PROJECT OF WORKS (PPR)

Project for the installation of scaffolding LSPR-200

PPR is applicable directly to the installation of the most widely used rack-mounted scaffolding, manufactured according to the technical specifications of GOST 27321. The scaffolding can be of any degree of prefabrication (tubular, frame and frame) and varied in the design of the node connections (clamp, hook, wedge or pin); in this case, the racks, frame and frame elements are joined using pipes.

The PPR consists of text and graphic parts. The graphic part is presented with diagrams of fencing the danger zone, installation sequence, and fastening the scaffolding to the wall.

The PPR has the following sections:

1. Explanatory note.

2. List of documents used.

3.1. Preparatory work.

3.2. Main works.

4.Quality requirements and acceptance of work.

5. The need for mechanization, tools, equipment and devices.

6. Safety precautions and labor protection.

7. Features of scaffolding installation high rise buildings, on buildings with balconies (loggias).

8. Technical and economic indicators.

1. Explanatory note

The PPR for the installation of scaffolding for the construction of a ventilated façade on the fitness center building was developed on the basis of the technical specifications and the submitted initial data. The technical specifications and initial data include: working documentation for the installation of a ventilated facade, a passport and instructions for the installation of scaffolding (for example, frame scaffolding LSPR-200), drawings for the building.

This PPR was developed using the following initial data.

LSPR-200 scaffolding is attached; when installing a ventilated facade, it can reach a height of 40 m. The tier height step is 2 m, the frame step along the wall is 3 m, the passage width between the posts is 0.95 m. Standard load at a height of more than 20 m no more than 100 kgf/m0 " style="background:white;border-collapse:collapse">

Components of scaffolding LSPR-200

Frame (2x1 m)

Frame with ladder (2x1 m)

Communication (3.05 m)

Diagonal connection (3.3 m)

Anchor plug

Blind clamp, 48x48 mm

End fencing

Flooring transom

The table shows that the weight of the scaffolding components does not exceed 12 kg and they can be lifted in a package to the installation horizon using a winch or roof crane with a lifting capacity of no more than 250 kg.

Building - rectangular shape, length along the facade 72.0 m, height no more than 40 m.

The U-kon curtain wall system with cladding elements is installed on the façade of the building - ceramic tile and aluminum profiles. In accordance with this, scaffolding is mounted along the facade in axes 1-12.

2. List of documents used

When developing the PPR, regulatory, methodological and reference documents were used, which are indicated in the list of references. The text also contains references to the following regulatory documents:

GOST 2.601-2006 ESKD. Operational documents

GOST 2.602-95* ESKD. Repair documents

GOST 9.104-79* ESKD. Paint and varnish coatings. Groups of operating conditions

GOST 7502-98 Metal measuring tapes. Specifications

GOST 7948-80 Steel plumb lines for construction. Specifications

GOST 8486-86* Softwood lumber. Specifications

GOST 9467-75* Coated metal electrodes for manual arc welding structural and heat-resistant steels. Types

GOST 15150-69* Machines, instruments and other technical products. Versions for different climatic regions. Categories, operating, storage and transportation conditions regarding the impact of environmental climatic factors

GOST 23407-78 Inventory fencing for construction sites and areas for construction and installation work. Specifications

MDS 12-41.2008 Assembly equipment for temporary fastening of prefabricated elements of erected and dismantled buildings.

3. Organization and technology of work execution

3.1. Preparatory work

Installation workers are instructed on the procedure, techniques and rules for assembling and attaching scaffolding to the wall.

Figure 1 shows an example of a fragment of a construction site plan. The symbols show scaffolding, the boundary of the danger zone when an object falls from the last tier of scaffolding, and temporary fencing of the construction site.

https://pandia.ru/text/80/128/images/image003_66.jpg" width="35" height="25">load-bearing external walls

Scaffolding

boundary of the danger zone when an object falls from a scaffolding layer

temporary fencing for scaffolding installation

Inspection, control and assessment of the technical condition of the components of the assembled scaffolding are carried out. Damaged components must be discarded.

Preparation for work, installation and launch is carried out lifting mechanisms(roof crane or winch) for lifting and lowering scaffolding components. These works are carried out in accordance with the instructions of the manufacturers of lifting mechanisms.

Mechanization equipment (hand drilling machines, hammer drills, rammers, etc.) and tools are prepared, their completeness and readiness for work is checked.

For the installation of scaffolding, a planned and compacted platform is prepared, from which water drainage must be arranged, or a platform with asphalt concrete pavement. If the soil is wet, then compaction is carried out with the addition of crushed stone, broken brick, and concrete.

Due to (according to the initial data) a height difference of up to 400 mm, the area for scaffolding along the facade in axes 1-12 is aligned horizontally in the longitudinal and transverse directions. To level out height differences of up to 500 mm, standard concrete slabs and boards with a thickness of at least 40-50 mm are used.

The scope of work is divided into three sections with a length of 24 m along the facade of the building and a height of no higher than 40 m. In this case, one set of scaffolding LSPR-200 is used (960 m with dimensions 40x24 m).

Marking of installation points for anchor plugs on the building wall is carried out in accordance with the working drawing for the wall or “in place”.

On initial stage determine the beacon points for marking the wall so that the points do not coincide with the window openings. If the attachment point coincides with the opening in the wall, the scaffolding is attached to load-bearing structures(walls, columns, ceilings) from the inside of the building using fastening devices and devices; It is not allowed to attach scaffolding to balconies, cornices, or parapets.

The distance from the anchor (dowel) installation point to the opening must be at least 150-200 mm. The horizontality of the extreme points is determined using a level, the points are marked with indelible paint. At two extreme points using laser level and a tape measure, determine and mark with paint intermediate points for installing anchor plugs. Then, at the extreme points of the horizontal line, vertical lines are determined. Indelible paint marks the installation points of anchors (dowels) on the outermost vertical lines.

3.2. Main works

The work is carried out with grips 24 m long along the facade of the building and a height of no higher than 40 m, starting from the first grip. If there are several sets of scaffolding, the installation of a ventilated facade and, accordingly, the installation of scaffolding can be carried out in parallel grips.

The scaffolding is assembled from frames, diagonal braces, shoes with screw height adjustment, deck crossbars and decking.

The scaffolding is secured to the wall using standard anchors (dowels).

The frames are built on top of each other to the required height and connected to each other using locks (clamps) with horizontal and diagonal connections. The deck crossbars are hung with their brackets on the upper links of adjacent frames on two upper tiers, one of which is working, the other is safety. Wooden flooring is laid on the crossbars.

The scaffolding is installed in accordance with the manufacturer's instructions, in tiers for the length of the grip.

The installation process consists of assembling the first, second, third and other tiers and attaching them to the wall.

Since the operations for assembling tiers are described in detail in the factory instructions for installing scaffolding, they are not given here.

To fasten scaffolding with anchors (dowels), holes are drilled in the wall at marked points every four meters in a checkerboard pattern, with a diameter and depth corresponding to the anchors. The strength of the fastening is checked by calculation (see section 2) and must be tested selectively using a special device.

If a hole is drilled by mistake in the wrong place, and a new one needs to be drilled, then the latter must be at least one depth away from the wrong one drilled hole. This rule is not necessary if the erroneous hole is pre-concreted or filled with a polymer composition of similar strength.

Cleaning the holes from drilling waste (dust) is done with compressed air.

The dowel is inserted into the prepared hole and hammered down with a mounting hammer.

End and longitudinal fences are installed on the working and safety tiers. In places where there are no diagonal connections installed on the working level, longitudinal fences are installed.

Dismantling of scaffolding for its relocation to a new grip is carried out in the reverse order of its installation. The lowering of the dismantled scaffolding components is carried out using a winch or roof crane.

4. Quality requirements and acceptance of work

The quality of scaffolding installation is ensured by ongoing monitoring of technological operations of preparatory and main work, and is also checked upon acceptance of work. Based on the results of the current control of technological operations, inspection reports of hidden work are drawn up (for the strength of fastening the scaffolding to the wall).

In progress preparatory work check:

Readiness of the wall and structural elements buildings, mechanization and tools for implementation installation work;

The quality of scaffolding components (size, absence of dents, bends and other defects of scaffolding elements);

Correct and reliable installation of scaffold shoes on the base.

During installation work, check:

Wall marking accuracy;

Diameter, depth and cleanliness of holes for anchors (dowels);

Strength of anchor fastening;

Verticality of frame posts and horizontality of ties, crossbars, scaffolding.

When extending frames, the gap between pipes and pipes should not exceed 3 mm.

When laying the flooring, the strength of the fastening and the absence of the possibility of shifts are checked.

When accepting work, the acceptance committee inspects the assembled scaffolding as a whole and especially carefully the places of fastening and interfaces.

Scaffolding is subject to a standard load test for two hours in the presence of the acceptance committee. At the same time, their strength and stability, reliability of fastening to the wall, flooring and fences, and grounding are assessed.

The railings of the fence must withstand a concentrated load of 70 kgf applied to them in the middle and perpendicularly.

Bearing horizontal connections must withstand a concentrated load of 130 kgf applied in the middle.

Acceptance of assembled scaffolding is documented in a work acceptance certificate. The certificate of inspection of hidden work is attached to the work acceptance certificate.

The quality of scaffolding installation is assessed by the degree of compliance with the actual parameters and characteristics specified in the design and regulatory technical documentation.

The main controlled parameters and characteristics, methods of their measurement and evaluation are given in Table 4.1.

Table 4.1


Technological operations	Controlled parameter, characteristic	Permissible value, requirement	Control method and tool
Marking the extreme points horizontally	Marking accuracy
Marking the extreme points vertically	Marking accuracy		Theodolite
Marking intermediate attachment points	Marking accuracy		Laser level, plumb line, tape measure
Drilling holes for plugs	Depth, Diameter,	screw length +10.0 screw diameter +0.2 mm	Depth gauge, bore gauge
	Distance to opening, building corner	Not less than 150.0
	Hole cleanliness	No dust	Visually
Installation of shoes	Thickness of the board lining		Metal ruler
Assembly of sections and tiers of scaffolding	Deviation from verticality	±1.0 mm at 2 m height	Plumb line, ruler
	Deviation from horizontality	±1.0 mm per 3 m length	Level, ruler
	The gap between the building wall and the decking	No more than 150 mm
	Linear dimensions	Up to 50 m - ±1%	Laser tape measure DISTO
Attaching scaffolding to the wall	The force that pulls the anchor out of the wall	Not less than 300 kgf	Plug monitoring device
Laying the flooring	Gap between boards	No more than 5 mm
	Board protrusions	No more than 3 mm
	Covering support deck joints	Not less than 200 mm	Metal ruler
Scaffolding grounding device	Ground resistance	No more than 15 Ohm	Testor Shch4313

5. The need for mechanization, tools, equipment and devices

The need for fixed mechanization equipment, tools, equipment and accessories is shown in Table 5.1.

Table 5.1


Name	Type, brand, GOST, N of drawing, manufacturer	Technical specifications	Purpose
Roof crane	"Pioneer" JSC "TEMZ" TL-12	Load capacity 150-500 kgf	Raising and lowering scaffolding components and façade elements
		Traction force 250 kgf
Plumb line, cord	OT400-1, GOST 7948 Three-strand nylon cord	Plumb weight no more than 0.4 kg, length 98 m. Cord length - 5 m, diameter 3 mm	Marking grips, checking verticality
Laser level	BL 40 VHR SKB "Stroypribor"	Measurement accuracy 0.1 mm/m	Height measurement
Laser level	BL 20 SKB "Stroypribor"	Measurement accuracy 0.1 mm/m	Checking horizontal planes
	Interskol DU 1000-ER	Power 1.0 kW, hole drilling diameter up to 25 mm	Drilling holes in the wall
Steel tape measure	R20UZK, GOST 7502	Length 20 m, weight 0.35 kg	Measuring linear dimensions
Screwdriver with tip	Screwdriver Pro LLC "INFOTEX"	Reversible lever	Screwing - unscrewing screws
Device for pulling dowels out of the wall		Measurement limits 100-500 kgf Dimensions: 1240x1200x175 mm Weight - 7.8 kg	Measuring the strength of scaffolding to the wall
Fencing the work site		Inventory	Work safety
Protective mesh for scaffolding	4.603; 4.504; 4.501.1 from Apex, Vert or other companies	Made from polymer fibers	Protection against falling objects from heights

6. Safety precautions and labor protection

When organizing and carrying out work on the installation of scaffolding, the requirements of SNiP 12-03, SNiP 12-04, GOST 12.4.011 must be met.

The scaffolding must display a layout diagram and the magnitude of the permissible loads on the scaffolding. More than three people are not allowed to gather on the scaffolding floor.

Workers who have the right to work at height are allowed to install scaffolding. Installers must be provided with safety belts.

Fire safety at workplaces must be provided in accordance with the rules of PPB-01.

Electrical safety at workplaces must be ensured in accordance with the requirements of POT R M-016.

When organizing a construction site, a danger zone is established from falling objects from the height of scaffolding, in this example from a height of 25 m, equal to 7 m. Dangerous area marked with safety signs and inscriptions established form in accordance with GOST 12.4.026. A protective net can be hung on the scaffolding. The danger zone may not be indicated.

The location and design of the construction site fencing are adopted in accordance with the requirements of GOST 23407.

Warehousing and storage of scaffolding components, materials, products and equipment must be carried out in accordance with the requirements of standards or technical specifications for scaffolding, materials, products and equipment, as well as SNiP 12-03.

When working at night, the construction site, scaffolding, passages and approaches to them must be illuminated in accordance with GOST 12.1.046. Illumination should be uniform, without glare from lighting fixtures.

Scaffolding stairs must be equipped in accordance with GOST 26887. The slope of the stairs to the horizon should be no more than 75°. Stairs must have non-slip steps.

Loads are lifted onto scaffolding using a winch or roof crane. Lifting loads onto scaffolding using jib cranes is unacceptable.

Lightning protection of scaffolding must be arranged with a grounding resistance of no more than 15 Ohms.

During the installation and dismantling of scaffolding, electrical wires located closer than 5 m from the scaffolding are de-energized.

During thunderstorms, snowfall and when the wind is more than 6 points, installation or dismantling of scaffolding is not carried out.

During installation and dismantling of scaffolding, window, balcony and door openings must be closed.

The technical condition of scaffolding is monitored before each shift and periodic inspections every 10 days. If the scaffolding has not been used for a month, then it is allowed to be used after acceptance by the commission. The results of acceptance and inspection are noted in the logbook in accordance with GOST 24258.

Scaffolding is subject to additional inspection after rain or thaw, which can reduce the bearing capacity of the foundation.

7. Features of installing scaffolding on high-rise buildings, on buildings with balconies (loggias)

In Russian megacities, the volume of construction of high-rise (30 floors and above) monolithic reinforced concrete residential and public buildings is growing.

The buildings in the plan have complex shape with rectangular and oval wall outlines, dimensions: length along the facade is not less than 50.0 m, width - 30 m, height up to 160 m. The thickness of the walls and interfloor ceilings is not less than 200 mm, window and other openings allow the installation of support devices for installing scaffolding at height.

Various works are carried out on the facades of these buildings using scaffolding: finishing, insulation, cladding and others. Conventional tubular, clamp scaffolding is used in accordance with GOST 27321, the racks of which are joined using pipes.

Scaffolding, for example, LSPH-200-60 - rack-mounted, attached, the height of the tier is 2 m, the spacing of the racks along the wall is 2.5 m, the width of the passage between the racks is 1.25 m. Flooring panels can be laid on all tiers at the same time. Standard load is no more than 200 kgf/m. Maximum height forests - 60 m.

The scaffolding is mounted from tubular elements: racks and half-racks with a diameter of 60 mm, installed in support shoes with wooden linings, longitudinal links with a diameter of 48 mm, connected to the racks using clamps, crossbars securing the scaffolding to the wall using metal or polymer plugs (dowels). On the outer sections of the scaffolding, diagonal connections are installed using rotary clamps.

Racks and half-racks are joined using pipes.

The links are connected to each other using bolts.

A non-rotating clamp connects posts and half-posts with crossbars and railings at right angles. A rotary clamp connects posts with diagonal braces at an acute or obtuse angle.

The design of the scaffolding allows the use of various schemes for installing the scaffolding of a high-rise building, depending on the configuration of the walls, the height of the building and other local conditions.

Before installation work begins, the usual preparatory work is carried out.

Scaffolding is mounted to a height of up to 160 m. A feature of the installation is the use of double racks, as a rule, up to a height of 80 m, and above that - single racks. The distance between double racks is usually taken to be 300 mm (Fig. 2).

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Fig.3. Attaching scaffolding to the wall through a window opening

The inventory fastening device is made, as a rule, from the same tubular elements as the scaffolding.

Elongated transverse scaffolding links are inserted into the opening, then longitudinal pipes are laid on them close to the wall. Fastening of connections and pipes is carried out using clamps or another method.

If the wall configuration does not allow using the usual scheme installation with the shoes resting on the ground, then the scaffolding is installed on supporting devices at a height. Supporting devices are mounted on the ceiling using cantilever beams or on the wall using brackets.

Let's take a look at these support devices.

The supporting device on the floor consisting of two cantilever beams and spacer posts is shown in Fig. 4.

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Fig.5. Support device mounted on reinforced concrete wall using a bracket

To install the bracket, a hole is made in the reinforced concrete wall into which a pin is inserted. A stand is hung on the stud, which has eyelets at the top and bottom for hinge mounting of the brace and beam on the studs. Standard shoes are welded to the beam, into which scaffolding posts are inserted and the scaffolding is installed.

Bracket parts are made from rolled steel profiles in two versions. According to the first option, the rack and beam are made of channels N 10 - N 16 in accordance with GOST 8240, depending on the load from the scaffolding, and the brace is made of strip steel. Moreover, the beam is welded from two channels. According to the second option, the rack is made from two angles N 5 - N 9 according to GOST 8509, and the beam is made from an I-beam N 12 - N 18. Strip steel is used for stretching.

The point of attachment of the brace on the beam, from the condition of equality of bending moments (the economical cross-section of the beam and the least weight), should be located at a distance of 4/5 of the length of the beam from the wall.

The standard stud for attaching the bracket to the wall is with a thread of at least M18.

The studs in the bracket hinges can be structurally identical with a diameter in the unthreaded section of at least 28 mm.

Calculations show that each bracket can withstand a load from two scaffolding posts of at least 2400 kgf.

The diagram for installing scaffolding on a building with balconies (loggias) is shown in Fig. 6.

Foundation blocks" href="/text/category/fundamentnie_bloki/" rel="bookmark">FB type foundation block weighing 200-300 kg.

Tests of the strength of the scaffolding to the wall indicate that the pull-out force does not exceed the force of the scaffolding to the wall provided by the dowel. In order to increase the safety margin of fastening the scaffolding to the wall, an additional attachment point is arranged at the level of the outrigger support of the scaffolding.

8. Technical and economic indicators

Table GESN 08-07-001 Installation and dismantling of external inventory scaffolding

Scope of work:

for standards 1-3:

01. Layout of the installation site for external scaffolding. 02. Assembly and installation of inventory scaffolding with the installation of decking, fences, stepladders and walking stairs. 03. Dismantling of scaffolding. 04. Refurbishment of scaffolding parts at each rotation. 05. Delivery of finished scaffolding elements from the on-site warehouse to the site and their transportation from the site to the on-site warehouse.

for standards 4, 5:

01. Assembly and installation of inventory scaffolding with the installation of decking, fences, stepladders and walking stairs. 02. Dismantling of scaffolding. 03. Refurbishment of scaffolding parts at each rotation. 04. Delivery of finished scaffolding elements from the on-site warehouse to the site and their transportation from the site to the on-site warehouse.

Meter: 100 m0 " style="background:white;border-collapse:collapse">

Installation and dismantling of external inventory scaffolding up to 16 m high:

tubular for masonry cladding

tubular for others finishing works

hanging

For every subsequent 4 m of height of external inventory scaffolding, add:

to standards 08-07-001-01, 08-07-001-02

to normal 08-07-001-03


Resource code	Cost element name	Unit measured	08-07- 001-01	08-07- 001-02	08-07- 001-03	08-07- 001-04	08-07- 001-05
	Labor costs of construction workers
	Average job level
	MACHINES AND MECHANISMS
	Flatbed vehicles, load capacity up to 5 tons
	MATERIALS
	Details of wooden scaffolding
	Details of steel tubular scaffolding
	Flooring panels

(Table GESN 08-07-001 as amended by the Amendments approved by order of the Ministry of Regional Development of Russia dated 01.01.2001 N 339).

List of used literature

SNiP 3.03.01-87 Load-bearing and enclosing structures.

SNiP 12-01-2004 Organization of construction.

SNiP 12-03-2001 Labor safety in construction. Part 1. General requirements.

SNiP 12-04-2002 Labor safety in construction. Part 2. Construction production.

SNiP II-23-81* Steel structures.

GOST 12.1.004-91* SSBT. Fire safety. General requirements.

GOST 12.1.030-81* SSBT. Electrical safety. Protective grounding, grounding.

GOST 12.1.046-85 SSBT. Construction. Lighting standards for construction sites.

GOST 12.4.011-89 Protective equipment for workers. General requirements and classification.

GOST 12.4.026-81 SSBT. Signal colors and danger signs.

GOST 12.4.059-89 SSBT. Construction. Inventory safety fences. General technical conditions.

GOST 24258-88 Scaffolding means. General technical conditions.

GOST 26887-86 Platforms and stairs for construction and installation work. General technical conditions.

GOST 27321-87 Rack-mounted attached scaffolding for construction and installation work. Technical conditions.

Decree of the Government of the Russian Federation of April 25, 2012 N 390 On the fire safety regime.

POT R M-016-2001 Interindustry rules on labor protection (safety rules) during the operation of electrical installations (as amended on 01/01/2001).

GOST 380-2005 Carbon steel of ordinary quality. Stamps.

GOST 3242-79 Welded joints. Quality control methods.

GOST 3262-75* Steel water and gas pipes. Technical conditions.

GOST 8240-97. Hot-rolled steel channels. Assortment.

GOST 8509-93 Hot-rolled equal flange steel angles. Assortment.

GOST 10704-91. Electric-welded straight-seam steel pipes. Assortment.

Working documentation and instructions for the use of mounted scaffolding for work on the facades of buildings under construction. - M.: TsNIIOMTP, 1998.

In our company you can order a PPR for the installation of scaffolding and scaffolding; we always meet deadlines, and our specialists have great experience on registration of PPR.

The PPR for the installation of scaffolding is a package of documents that includes diagrams and technological instructions for performing various processes at the facility being constructed/repaired. Scaffolding is an auxiliary structure with the help of which facade, installation and other dangerous work is carried out at height. Therefore, the preparation of PPR for their installation is a mandatory measure that regulates the procedure for carrying out all engineering work, sets construction deadlines, and also describes existing risks and construction site safety practices.

The price for preparing a project for scaffolding is from 30,000 rubles

The financial issue of developing project documentation depends on the specifics of the source data and wishes that the customer will indicate in the technical specifications. Main factors influencing cost:

TEP (technical and economic indicators);
complexity of installation processes (difficult construction, a large number of floors, the presence of overhanging or protruding parts of the structure, the need to arrange multi-post scaffolding, etc.);
development urgency requirements.

Starting information for the project

When drawing up the PPR for the installation of scaffolding, the type of development, as well as the specifics of the planned work, are taken into account. The design of this auxiliary device includes many tiers and sections for organizing several workplaces at a height, located both in the vertical and horizontal planes. Scaffolding is indispensable during construction and reconstruction multi-storey buildings. The most functional is the rack-mounted attached type of scaffolding, which is used for:

stone and facing masonry using small-sized materials (bricks, small-sized blocks, etc.);
repair and insulation work;
reconstruction of facades;
painting, plastering and other finishing processes.

The type of scaffolding is selected based on technical characteristics serviced object and economic feasibility. The main parameters of auxiliary structures are their maximum height and permissible level flooring loads. The PPR for forests must also indicate:

number of mounting elements used;
permissible weight of individual parts of the structure;
cost of work;
complexity of installation.

Documents for PPR

PPR on scaffolding created on the basis of existing working documentation. The effectiveness of installation work and safe operation of auxiliary structures depends on the correct preparation of the project. To begin creating a PPR, the following documents are required:

technical specifications from the customer;
POS (construction organization project);
data on the building layout and façade characteristics;
site plan with its topographic and engineering parameters.

PPR sections

To install scaffolding, the work project must be agreed upon with the relevant authorities. The PPR includes the following mandatory sections:

scheduling;
construction master plan;
technical maps of scaffolding installation works;
safety and labor protection standards;
basic instructions for carrying out work;
measures for food safety and environmental protection.

The work plan for the installation of scaffolding includes a text and graphic part. The latter contains drawings and diagrams that accurately depict the stages of installation of auxiliary building structures. The developer indicates areas for attaching scaffolding to the building and dangerous areas where reliable fixation or safe stay of workers is impossible. Composition of the graphic part:

construction master plan;
scaffolding installation plan;
facade diagrams with marked places for fastening structures.

The text part is an explanatory note that regulates:

standards for installation and dismantling of construction scaffolding;
organizational and technological parameters of work execution;
requirements for quality and acceptance of work;
safety and labor protection rules at the site;
a list of necessary equipment, tools, special devices and mechanization equipment.

Thanks to our extensive experience in this field, our company guarantees the prompt preparation of a work permit for the installation of scaffolding and scaffolding in full compliance with existing standards.

In fact, scaffolding is a universal equipment that can be used to perform various types of work. Be it easy redecorating or masonry, the use of these installations will be relevant in any case.

If you decide to purchase such equipment, first of all you should study the PPR for scaffolding. Using this document, you can effectively plan and organize work and accurately position the structure. Error-free installation requires the following: positive points:

— the efficiency of work performed is significantly increased;

— time resources for their implementation are saved;

— ensuring the safety of workers.

Therefore, PPR for the installation of scaffolding should be used by both beginners and experienced builders.

Also, the versatility of scaffolding lies in the possibility of using it on various types construction sites. Their use is relevant in the construction of small private buildings, as well as in the construction of large objects. Scaffolding is often used when performing façade work on multi-storey buildings. Thus, the equipment itself becomes a large structure that is tightly adjacent to the construction site. Thus, it becomes necessary to develop a project for the creation and installation of scaffolding. A carefully thought-out layout will make it possible to position the structure as correctly and accurately as possible, saving money on their purchase and installation.

There are several options for developing such a document. The best solution is to prepare it yourself. Specialists who know all the intricacies of planning can also help in this matter. It is especially important to turn to professionals when it is necessary to work with complex facades. And if future work is not specific, you can easily download a free PPR for scaffolding on the Internet. However, in this option there are some nuances. Poor workmanship that contains errors can result in a scaffolding project that is not only ineffective, but also dangerous. Therefore, before downloading a project online, you must first carefully study existing options PPR for scaffolding. The sample must be properly designed and comply with all standardized rules and requirements. It's also better to check if it was actually implemented. It is you, and not the first developer of the PPR for the installation of scaffolding, who will be responsible for the result obtained.

From the above it follows that the most ideal option there will be an appeal to professionals who will prepare a personal project corresponding to the upcoming work. This will guarantee the correct installation of the scaffolding and the safe work of people.

If you will independently prepare a work permit for the installation of scaffolding, you will need to download several options. When carefully studying the documents, you should take into account the huge number of subtleties and details that need to be understood. For example, what should be the distance between the wall of the structure and the scaffolding. It is also necessary to have information regarding permissible height differences on scaffolding. You can download the PPR for scaffolding on the websites of scaffolding manufacturers like ours. However, only experienced specialists can know such clarifications.

By turning to professionals, the PPR will be developed with high quality and in the shortest possible time. After which, you can confidently begin to carry out work. Without of this document the activity is in principle impossible, or rather, even illegal. After all, documentary evidence of correct installation and safety is the basis of any construction activity. Only after confirming this with existing standards is it possible to begin installing scaffolding. PPR for installation of auxiliary structures are an integral part of organizational and technological documents and are necessary when preparing permits for any construction works.

MDS 12-57.2010

Moscow 2010

INTRODUCTION

In Russian megacities, there is an increase in the volume of construction of high-rise (from 30 floors and above) monolithic reinforced concrete residential and public buildings. Various works are carried out on the facades of these buildings using scaffolding: finishing, insulation and others.

Scaffolding is applicable for buildings with a variety of architectural, planning and design parameters, configuration, height and length.

Scaffolding is indispensable in cramped urban conditions, where they are used as a universal means of scaffolding, as well as for placing building materials and facade structures.

The labor intensity of scaffolding installation does not, as a rule, exceed 0.6 man-hours per 1 m2 of façade area.

Projects for the execution of works for the installation of scaffolding are part of the main organizational and technological documents for construction and are in demand by local government supervision authorities when issuing permits for construction work.

The document is directly applicable to the installation of the most widely used scaffolding, manufactured according to the technical specifications of GOST 27321-87. In this work project, tubular, clamp scaffolding is used, the racks of which are joined using pipes.

The work production project consists of text and graphic parts. The graphic part is represented by diagrams of components, installation sequence, fastening of the scaffolding to the wall, and the supporting device of the scaffolding on the floor of the building.

This methodological document is intended to assist design, design and technological and construction organizations in the development of a project for the installation of high-rise scaffolding.

The methodological document is based on the results of the work of ZAO TsNIIOMTP and other design and technological institutes, as well as a generalization of the practical experience of scaffolding installation by REMSTROYSERVIS-R LLC and other Moscow construction organizations.

1 CHARACTERISTICS OF THE BUILDING AND SCAFFOLDING

The monolithic reinforced concrete residential building has a complex shape in plan with rectangular and oval outlines of the walls, overall dimensions: length along the facade is not less than 50 m, width - 30 m, height - up to 160 m. The thickness of the walls and interfloor ceilings is not less than 200 mm, window and other openings allow the installation of support devices for installing scaffolding at height.

The project for the installation of scaffolding was developed on the basis of a contract, technical specifications and the submitted initial data. The technical specifications and initial data include: working documentation for construction work on the facade, passport and instructions for installing scaffolding, drawings for the building (to the extent necessary for installing scaffolding).

This work project was developed using the following initial data.

The design of clamp scaffolding is inventory, lightweight, collapsible, reusable. Scaffold turnover is at least 60 times, and service life is at least 5 years.

Scaffolding, for example: LSPKH-200-60 from Metakon, rack-mounted attached clamps in accordance with GOST 27321. The height of the tier is 2 m, the pitch of the racks along the wall is 2.5 m, the width of the passage between the racks is 1.25 m. Panels floorings can be laid on all tiers at the same time. Standard load is no more than 200 kgf/m2. The maximum height of the scaffolding is 60 m.

The scaffolding is mounted from tubular elements - racks and half-posts with a diameter of 60 mm, installed in support shoes with wooden linings, from longitudinal links with a diameter of 48 mm, connected to the racks using clamps, crossbars, securing the scaffolding to the wall using metal or polymer plugs (dowels) . On the outer sections of the scaffolding, diagonal connections are installed using rotary clamps.

Racks and half-racks are joined using pipes.

The links are connected to each other using bolts.

The plugs are inserted into holes drilled in the wall. Hooks are screwed into the plugs, and the plugs are wedged out. The eyes of the crossbars are put on the hooks, after which the crossbars are secured with clamps to the racks.

A non-rotating clamp connects posts and half-posts with crossbars and railings at right angles. A rotary clamp connects posts with diagonal braces at an acute or obtuse angle.

The outer rows of racks are fastened through one tier in height, the inner rows of racks are fastened in a checkerboard pattern through two tiers in height and through two racks horizontally.

When using scaffolding in accordance with GOST 27321, for example, type LSPH-200-60 from Metakon, for installation on high-rise buildings, a number of measures based on calculations are performed that are not provided for by the manufacturer.

To increase the load-bearing capacity of high-rise scaffolding, so-called double racks made of pipes with an outer diameter of 60 mm are used, which are the main element of high-rise scaffolding and the main condition for installing standard scaffolding on high-rise buildings. The bearing capacity of the rack must be checked by calculation; the load on the rack should not exceed 3 tf. The actual load on the most loaded racks should be selectively determined experimentally, using instruments, such as special scales, and recorded in the work log.

In addition to this main event, the following activities are also carried out.

Thus, the standard load on forests is not set at 200 kgf/m2, but reduced, for example, no more than 100 kgf/m2.

To reduce the load on the scaffolding, according to the calculation, the number of working and protective flooring is reduced. In this case, flooring panels can not be laid on all tiers at the same time, but one by one and staggered.

Depending on local conditions, it may be necessary to change the pitch of the racks along the wall: for example, not 2.5 m, but 2.6 m or 2.4 m.

The width of the passage between the racks can be taken not 1.25 m, but, for example, 1.31 m.

The scheme for attaching the scaffolding to the wall, specified in the manufacturer's operating instructions, may be changed.

Scaffolding can be mounted not on a dirt site (without or with an asphalt concrete surface), but at a height - on supporting devices made of cantilever beams.

With simple architectural and construction solutions for a building, one or two of the above activities are carried out. Modern architectural and construction solutions for buildings are complex, which requires the development of almost all or all of the above measures and their corresponding reflection in the scaffolding installation project.

All of these measures, as stated, must be justified by calculations and agreed with the manufacturer.

The implementation of the above measures allows the use of various installation schemes for high-rise scaffolding, depending on the configuration of the walls, the height of the building and other local conditions.

The project outlines the provisions for the organization and technology of scaffolding installation, requirements for the quality and acceptance of work, determines the need for mechanization, tools, equipment and devices, and specifies safety and labor protection requirements.

When developing the project, the regulatory, methodological and reference documents specified in the List of Used Documents were used.

2 LIST OF DOCUMENTS USED

SNiP 3.03.01-87. Load-bearing and enclosing structures.

SNiP 12-01-2004. Organization of construction.

SNiP 12-03-2001. Occupational safety in construction. Part 1. General requirements.

SNiP 12-04-2002. Occupational safety in construction. Part 2. Construction production.

GOST 12.1.004-91. SSBT. Fire safety. General requirements.

GOST 12.1.019-79. SSBT. Electrical safety. General requirements and nomenclature of types of protection.

GOST 12.1.030-81. SSBT. Electrical safety. Protective grounding, grounding.

GOST 12.1.046-85. SSBT. Construction. Lighting standards for construction sites.

GOST 12.4.011-89. SSBT. Protective equipment for workers. General requirements and classification.

GOST R 12.4.026-2001. SSBT. Signal colors, safety signs and signal markings.

GOST 12.4.059-89. SSBT. Construction. Inventory protective fences. General technical conditions.

GOST 7502-98. Metal measuring tapes. Technical conditions.

GOST 7948-80. Steel plumb lines for construction. Technical conditions.

GOST 8240-97. Hot-rolled steel channels. Assortment.

GOST 23407-78. Inventory fencing for construction sites and construction sites. Technical conditions.

GOST 24258-88. Scaffolding means. General technical conditions.

GOST 26887-86. Platforms and stairs for construction and installation work. General technical conditions.

GOST 27321-87. Rack-mounted, attached scaffolding for construction and installation work. Technical conditions.

PPB-01-03. Fire safety rules in the Russian Federation.

POT R M-016-2001. Interindustry rules on labor protection (safety rules) during the operation of electrical installations.

MDS 12-25.2006. Scaffolding. Installation, calculation, operation. - M.: JSC "TsPP", 2006.

MDS 12-41.2008. Assembly equipment for temporary fastening of prefabricated elements of erected and dismantled buildings. - M.: JSC "TsPP", 2008.

3 ORGANIZATION AND TECHNOLOGY OF WORK EXECUTION

3.1 Preparatory work

3.1.1 Before the start of installation work, the following preparatory work is carried out:

The scaffolding installation area (as well as the approaches to it and nearby areas) is cleared of building structures, materials, machinery and construction waste and is fenced in accordance with the requirements of SNiP 12-03. Fences must meet the requirements of GOST 23407; warning signs are installed in accordance with GOST R 12.4.026;

Installation workers are instructed on the procedure, techniques and rules for assembling and attaching scaffolding to the wall.

The plan for the scaffolding installation area is given in the work production project on sheets, usually in A2 (420×594) or A3 (297×420) format. In Fig. 1 shows as an example a fragment of a plan for the scaffolding installation area on an area corresponding to the factory set of scaffolding. Symbols according to RD-11-06 show scaffolding, the boundary of the danger zone when an object falls from a scaffolding layer, and temporary fencing of the installation area.

The boundary of the danger zone is established by calculation according to RD-11-06, depending on the height of the scaffold layer.

LEGEND:

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3.1.2 Inspection, control and assessment of the technical condition of the components of the erected scaffolding are carried out. Damaged components must be discarded.

The components sorted by detail are laid along the walls.

3.1.3 Preparations for work are carried out, installation and launch of lifting mechanisms (roof crane, jib crane, winch) for lifting and lowering scaffolding components. These works are carried out in accordance with the instructions of the factories that manufacture lifting mechanisms.

3.1.4 Mechanization equipment (hand-held drilling machines, hammer drills, rammers, etc.) and tools are prepared, their completeness and readiness for work are checked.

3.1.5 To support the scaffolding along the facade, a platform with a width of at least 3 m with an asphalt concrete surface or a leveled and compacted dirt platform is prepared. The bearing capacity of the sites is checked by calculation. Water drainage must be arranged from the site. If the soil is wet, then compaction is carried out with the addition of crushed stone, broken brick, and concrete.

If there is a difference in height, then the scaffolding area along the facade is leveled horizontally in the longitudinal and transverse directions. To level out the difference in height, standard concrete slabs and boards with a thickness of at least 40 - 50 mm can be used.

3.1.6 Marking of installation points for anchor plugs on the building wall is carried out in accordance with the working drawing for the wall or “in situ”.

At the initial stage, beacon points for marking the wall are determined so that the points do not coincide with the window openings. If the attachment point coincides with the opening in the wall, the scaffolding is attached to load-bearing structures (walls, columns, floors) from the inside of the building using fastening devices and devices; It is not allowed to attach scaffolding to balconies, cornices, or parapets.

The distance from the installation point of the anchor plug to the opening must be at least 150 - 200 mm. The horizontality of the extreme points is determined using a level, the points are marked with indelible paint. At the two extreme points, using a laser level and tape measure, determine and mark with paint the intermediate points for installing the anchor plugs. Then, at the extreme points of the horizontal line, vertical lines are determined. Use indelible paint to mark the installation points of the anchor plugs on the outermost vertical lines.

3.2 Basic work

3.2.1 Installation work from the zero level is carried out using grippers, taking into account, as a rule, the use of one set of scaffolding supplied by the manufacturer for gripping. The volume of the scaffold is usually set to no more than 50 m along the façade of the building and a height of no higher than 60 m. When installing scaffolding from an elevation of 60 m and above, the height of the scaffold is taken to be no higher than 20 m.

To speed up the installation of scaffolding (if there are several sets of scaffolding), work can be carried out with several parallel grips.

Independent parallel gripping can be organized when installing scaffolding on a support device made of cantilever beams, which is installed on the interfloor ceiling at a height, usually above 60 m.

3.2.2 When using double racks up to a height of 80 m, and above - single scaffolding is mounted at a height of up to 160 m. The distance between double racks is usually taken to be 300 mm (Fig. 2).

If the configuration of the wall does not allow the use of such a scheme, then the scaffolding is installed on the above support devices on the floor of the building. The height of the grip is assumed to be no higher than 20 m.

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3.2.3 Installation of scaffolding is carried out, according to the manufacturer’s instructions, in tiers for the length of the grip.

The technological installation process consists of assembling the first, second, third and other tiers, attaching scaffolding to the building and installing supporting devices at height.

3.2.4 The scaffold tiers are assembled as follows. Shoes with screw height adjustment are installed on a prepared platform that is level in the horizontal plane (see Section 3.1).

The height difference in the direction along the wall is leveled by laying concrete slabs and board linings.

Under the shoes of each pair of racks, a lining made of boards with a thickness of at least 40 - 50 mm is laid in the transverse direction. Installation of shoes is shown in Fig. 3, a.

The main parts of the tiers are assembled in the following sequence.

Double racks of the inner and outer rows of scaffolding are installed in the shoes (Fig. 3, b).

Transverse and longitudinal connections are installed on the internal and external rows of racks for the supports of the first assembly tier (Fig. 3, c).

At each rack, panels are laid on the longitudinal supports-supports of the first assembly tier.

From the platforms of the first assembly tier, longitudinal braces of the first working tier are installed and holes are drilled in the wall for plugs (dowels) for fastening the transverse braces of the first working tier.

Plugs (dowels) are inserted into the holes and cross braces are attached to the wall.

From the platforms of the first assembly tier, fences of the first working tier are installed, corner posts, transfer the panels of the assembly tier to the flooring of the first tier. The flooring is equipped with a side fence 150 mm high.

Racks are built up from the flooring of the first tier, a second mounting tier is installed, from which the second working tier is assembled.

The assembly operations of subsequent tiers are repeated.

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3.2.5 The scaffolding is attached to the building to a reinforced concrete wall with a thickness of at least 200 mm using factory-made metal plugs or polymer dowels and through openings (windows, doors, balconies).

Fastening scaffolding using dowels is shown in Fig. 4.

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Dowels, for example type MGD 14×100, with a MUNGO MGV 12×350 bolt with a ring are secured in the wall four meters apart in a checkerboard pattern according to the intended fastening points. The diameter and depth of the hole in the wall must correspond to the values specified in the factory instructions.

The strength of the fastening of the dowels in the wall is checked by calculation and must be tested selectively using a device (device) for pulling the plug out of the wall. The pulling force from concrete must be provided at least 300 kgf.

If a hole is drilled by mistake in the wrong place and a new one needs to be drilled, then the latter must be located at least one depth of the drilled hole from the mistaken one. This rule is not necessary if the erroneous hole is pre-concreted or filled with a polymer composition of similar strength.

Cleaning the holes from drilling waste (dust) is done with compressed air.

The dowel is inserted into the prepared hole and hammered down with a mounting hammer.

Attaching scaffolding to the wall through a window opening is shown in Fig. 5.

Rice. 5

The inventory fastening device is made, as a rule, from the same tubular elements as the scaffolding.

3.2.6 The supporting device at height is mounted from two cantilever beams and spacer posts. The beams are laid on the floor through sheet metal supports so that the length of their cantilever part allows the scaffolding to be installed at a distance of 600 mm from the wall to the axis of the internal rack. Then racks with screw mechanisms are installed on the opposite ends of the beams. The upper supports of the racks with wooden spacers are brought to the ceiling. Using screw mechanisms with a tightening torque of at least 5 kgf m, the racks rest against the ceiling and beams, pressing them against the ceiling and at the same time securing the support device in the opening.

To secure the scaffolding to the supporting device, loops welded to the beams are used.

A channel according to GOST 8240 is most often used as cantilever beams. The number of the channel (from No. 12 and more) is selected by calculation depending on the load from the scaffolding, which is determined by direct summation of the weight of the scaffolding parts (no more than 20 m in height) and the working load. The weight of the cantilever beam should not exceed 140 - 150 kgf, provided that the installation team performs installation operations manually. Therefore, the channel number must correspond to the minimum allowable safety factor of the cantilever beam.

For spacer posts, mounting posts of a telescopic design with a screw mechanism for adjusting the height of the supports are used. The main parameters of the racks: height up to 3100 mm, thrust force from 3000 to 5000 kgf (see MDS 12-41).

The values of thrust forces from the racks transmitted to the interfloor floors must be determined by calculation and selectively tested experimentally. The values and places of application of these forces from the racks must be agreed upon with the organization that designed the building and entered into the work log. If temporary reinforcement of floors is necessary, mounting telescopic racks are installed on the underlying floors.

3.2.7 Lifting scaffolding components to the installation horizon is carried out using winches installed on the ground, roof cranes and cantilever cranes installed on interfloor ceilings in building openings.

The speed of movement of the cargo rope must be at least 50 m/min. To eliminate dynamic loads during acceleration and deceleration of the load, the speed of movement of the cargo rope must have a smooth frequency control.

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Dismantling of scaffolding for its rearrangement to a new grip is carried out in the reverse order of their installation, that is, starting from the upper tier. Remains of building materials, equipment and tools are removed from the floorings. The lowering of the dismantled scaffolding components is carried out using the above winches and cranes.

4 QUALITY REQUIREMENTS AND ACCEPTANCE OF WORK

4.1 The quality of scaffolding installation is ensured by ongoing monitoring of technological operations of preparatory and main work, as well as during acceptance of work. Based on the results of the current control of technological operations, inspection reports for hidden work are drawn up: for the strength of fastening plugs for scaffolding anchors in the wall, for the stability and strength of fastening of scaffolding support devices at height.

4.2 During the preparatory work, check:

Readiness of the wall and structural elements of the building, mechanization equipment and tools for installation work;

Condition of scaffolding parts (dimensions, absence of dents, bends and other defects of scaffolding parts);

Condition of parts of supporting devices (absence of defects in cantilever beams and racks, reliability of beam hinges);

Evenness and equal strength of the base points on which the shoes are installed.

4.3 During installation work, check:

Wall marking accuracy;

Correct and reliable installation of scaffold shoes on the base;

Diameter, depth and cleanliness of holes for anchor plugs;

Strength of anchor fastening;

Verticality of racks and horizontality of connections, scaffolding.

The horizontality of the scaffolding in the longitudinal and transverse directions is ensured by level, verticality - by plumb.

When assembling the scaffolding, it is necessary to ensure that the racks fit into the pipes to the designed length.

When laying the flooring, the strength of the fastening and the absence of the possibility of shifts are checked.

4.4 When accepting work, the acceptance committee inspects the assembled scaffolding as a whole and especially carefully the places of fastening and interfaces.

The horizontality and verticality of forests are checked using geodetic instruments.

Defects found during inspection are eliminated.

The railings of the fence must withstand a concentrated load of 70 kgf applied to them in the middle and perpendicularly.

Bearing horizontal connections must withstand a concentrated load of 130 kgf applied in the middle.

4.5 Acceptance of assembled scaffolding is documented in a work acceptance certificate. Certificates of inspection of hidden work are attached to the work acceptance certificate (under clause 4.1).

4.6 The quality of scaffolding installation is assessed by the degree of compliance of the actual parameters and characteristics with the design ones specified in the design and normative-technical documentation.

The main controlled parameters and characteristics, methods of their measurement and evaluation are given in Table 1.

Table 1

Technological operations	Controlled parameter, characteristic	Permissible value, requirement	Control method and tool
Marking the extreme points horizontally	Marking accuracy
Marking the extreme points vertically			Theodolite
Marking intermediate attachment points			Level, plumb line, tape measure
Drilling holes for anchor plugs (dowels)	Depth N	N= screw length + 10.0 mm
	Diameter D	D= screw diameter + 0.2 mm	Depth gauge, bore gauge
	Distance to opening, building corner	Not less than 150.0 mm
	Hole cleanliness	No dust	Visually
Installation of shoes	Thickness of the board lining		Metal ruler
Assembly of sections and tiers of scaffolding	Deviation from verticality	±1.0 mm at 2 m height	Plumb line, ruler
	Deviation from horizontality	±1.0 mm per 3 m length	Level, ruler
	The gap between the building wall and the decking	No more than 150 mm
	Linear dimensions	Up to 50 m - ±1%	Laser tape measure DISTO
Attaching scaffolding to the wall	The force that pulls the anchor (dowel) out of the wall	Not less than 500 kgf	Force measuring device
Laying the flooring	Gap between boards	No more than 5 mm
	Board protrusions	No more than 3 mm
	Covering support deck joints	Not less than 200 mm	Metal ruler
Installation of racks	Torque		Torque wrench
Scaffolding grounding device	Ground resistance	No more than 15 Ohm	Testor Shch 4313

5 NEED FOR MECHANIZATION, TOOLS, INVENTORY AND DEVICES

The need for fixed mechanization equipment, tools, equipment and accessories is shown in Table 2.

table 2

Name	Type, brand, GOST, drawing No., manufacturer	Technical specifications	Purpose
Roof crane	Type "Pioneer", JSC "TEMZ"	Load capacity 150 - 500 kg	Raising and lowering scaffolding components and façade elements
Variable speed winch	Type LChS-3	Traction force up to 250 kgf
Plumb line, cord	OT400-1, GOST 7948 Three-strand nylon cord	The weight of the plumb line is no more than 0.4 kg, length 98 m. Cord length - 5 m, diameter - 3 mm	Marking grips, checking verticality
Laser level	BL 40 VHR SKB "Stroypribor"	Measurement accuracy 0.1 mm/m	Height measurement
Laser level	BL 20 SKB "Stroypribor"		Checking horizontal planes
	Interskol DU 1000-ER	Power 1.0 kW, hole drilling diameter up to 25 mm	Drilling holes in the wall
Device for measuring the load on scaffold posts (scales)	R20UZK, GOST 7502	Measurement limit 1.5 - 4.5 tf, weight 0.35 kg	Rack load control
Torque wrench		Measurement limits 3 - 8 kgf m, weight 3.5 kg	Monitoring the strength of fastening of the mounting posts of the scaffolding support device
Device for measuring the force of pulling out a plug (dowel)		Measurement limits 100 - 400 kgf. Dimensions: 1240? 1200? 175 mm. Weight - 7.8 kg	Checking the strength of the scaffolding to the wall
Fencing the work site		Inventory	Work safety
Protective mesh for scaffolding	Types 4.603; 4.504; 4.501.1 from Apex, Vert or others	Made from polymer fibers	Protection against falling objects from heights

6 SAFETY AND OCCUPATIONAL HEALTH

6.1 When organizing and carrying out work on the installation of scaffolding, the requirements of SNiP 12-03, SNiP 12-04, GOST 12.4.011 must be met.

The scaffolding must be posted with a layout diagram and the magnitude of the permissible loads. The gathering of three or more people on the scaffolding floor is not allowed.

Workers who have the right to work at height are allowed to install scaffolding. Installers must be provided with safety belts.

6.2 Fire safety in workplaces must be ensured in accordance with the rules of PPB-01.

6.3 Electrical safety at workplaces must be ensured in accordance with the requirements of GOST 12.1.019, GOST 12.1.030, POT R M-016.

6.4 When organizing work in the installation area, a danger zone is established from falling objects from the height of the scaffolding. The dangerous zone is indicated by safety signs and inscriptions of the established form in accordance with GOST R 12.4.026.

In each specific case, the work design must include measures so that the danger zone does not extend beyond the fenced scaffolding installation area.

A protective net can be hung on the scaffolding. The danger zone may not be indicated.

The location and design of the installation area fencing must be adopted in accordance with GOST 23407.

6.5 Warehousing and storage of scaffolding components, materials, products and equipment must be carried out in accordance with the requirements of standards or technical specifications for scaffolding, materials, products and equipment, as well as SNiP 12-03.

6.6 When working at night, the installation area, scaffolding, passages and approaches to them must be illuminated in accordance with GOST 12.1.046. Illumination should be uniform, without glare from lighting fixtures.

6.7 Scaffolding stairs must be equipped in accordance with GOST 26887. The slope of the stairs to the horizon should be no more than 75°. Stairs must have non-slip steps.

6.8 Loads are lifted onto scaffolding using a winch or roof crane. Lifting loads onto scaffolding using tower cranes is unacceptable.

6.9 Lightning protection of scaffolding must be arranged with a grounding resistance of no more than 15 Ohms.

6.10 During installation and dismantling of scaffolding electric wires, located closer than 5 m from the forests, cut off power.

During thunderstorms, snowfall and wind speeds of more than 6 m/s, scaffolding cannot be installed or dismantled.

6.11 The technical condition of scaffolding is monitored before each shift and periodic inspections every 10 days.

Particular attention should be paid to measuring and monitoring the actual loads on the posts and shoes, pulling out the forces of the anchors from the wall. At the same time, the deformation of the posts and wooden shoes, cross members and anchors and their relative movement must be measured and assessed.

If the scaffolding has not been used for a month, then it is allowed to be used after acceptance by the commission. The results of acceptance and inspection are noted in the logbook in accordance with GOST 24258.

Scaffolding is subject to additional inspection after rain or thaw, which can reduce the bearing capacity of the foundation.