Marching stairs, platforms and railings steel conditions. Marching stairs, platforms and steel railings

1 area of use

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 Main parameters and dimensions

Table 1 - Parameters and dimensions of flights of stairs

Table 2 - Dimensions of rectangular areas

Table 3 - Parameters and dimensions of stair railings

Table 4 - Dimensions of site fences

6 Technical requirements

7 Acceptance rules

8 Control methods

9 Transport and storage

10 Installation instructions

11 Manufacturer's warranties

Layout schemes of mid-flight stairs

1. Main parameters and dimensions

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Control methods

6. Marking, packaging, transportation and storage

Marching stairs, platforms and railings steel conditions. Marching stairs, platforms and steel railings

1 area of ​​use

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 Main parameters and dimensions

Table 1 - Parameters and dimensions of flights of stairs

Table 2 - Dimensions of rectangular areas

Table 3 - Parameters and dimensions of stair railings

Table 4 - Dimensions of site fences

6 Technical requirements

7 Acceptance rules

8 Control methods

9 Transport and storage

10 Installation instructions

11 Manufacturer's warranties

Layout schemes of mid-flight stairs

1. Main parameters and dimensions

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Control methods

6. Marking, packaging, transportation and storage

1 area of use

1 area of use

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 Main parameters and dimensions

6 Technical requirements

7 Acceptance rules

8 Control methods

9 Transport and storage

10 Installation instructions

11 Manufacturer's warranties

Annex A (informative). Layout schemes of mid-flight stairs

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Control methods

6. Packing, marking, transportation and storage

7. Installation instructions

Application (reference). Examples of railings for stairs, balconies and roofs

1. Main parameters and dimensions

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Control methods

6. Marking, packaging, transportation and storage

7. Installation instructions

8. Manufacturer's Warranties

Application
Reference

Layout schemes of mid-flight stairs

1 area of ​​use

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 Main parameters and dimensions

6 Technical requirements

7 Acceptance rules

8 Control methods

9 Transport and storage

10 Installation instructions

11 Manufacturer's warranties

Annex A (informative). Layout schemes of mid-flight stairs

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Control methods

6. Packing, marking, transportation and storage

7. Installation instructions

Application (reference). Examples of railings for stairs, balconies and roofs

1. Main parameters and dimensions

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Control methods

6. Marking, packaging, transportation and storage

7. Installation instructions

8. Manufacturer's Warranties

ApplicationReference

Layout schemes of mid-flight stairs

1 area of use

Application
Reference

Figure 2 - Sites (PM)

Figure 2 - Sites (PM)

L

Enacted by order federal agency on technical regulation and metrology of September 26, 2016 N 1213-st

Interstate standard GOST 23120-2016

"MIDDLE STAIRS, PLATFORM AND FENCES STEEL. TECHNICAL CONDITIONS"

Steel flights of steps, stair landings and railings. Specifications

Instead of GOST 23120-78

Foreword

The goals, basic principles and basic procedure for carrying out work on interstate standardization are established in GOST 1.0-2015 "Interstate standardization system. Basic provisions" and GOST 1.2-2015 "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Rules for the development, adoption , updates and cancellations"

About the standard

1 Developed by Closed Joint Stock Company "Central Order of the Red Banner of Labor Research and Design Institute building steel structures them. N.P. Melnikov" (CJSC "CNIIPSK named after N.P. Melnikov")

2 Introduced technical committee according to standardization TC 465 "Construction"

3 Adopted by the Interstate Council for Standardization, Metrology and Certification (Minutes of June 28, 2016 N 49)

4 Order of the Federal Agency for Technical Regulation and Metrology dated September 26, 2016 N 1213-st interstate standard GOST 23120-2016 was put into effect as a national standard Russian Federation since March 1, 2017

5 Instead of GOST 23120-78

This standard applies to steel marching stairs, platforms and fences to them, used in industrial buildings and structures erected and operated at a temperature not higher than plus 100°С and not lower than minus 60°С.

This International Standard specifies technical requirements on mid-flight stairs with an inclination angle of 45° and 60°, rectangular transition platforms and railings to them, made of cold-formed and hot-rolled profiles and designed for standard live loads of 200, 300 and 400 kgf / m 2.

This standard uses Normative references to the following interstate standards:

GOST 2.321-84 one system design documentation. Letter designations

GOST 9.032-74 Unified system of protection against corrosion and aging. Paint coatings. Groups, technical requirements and designations

GOST 21.001-2013 System project documentation for construction. General provisions

GOST 21.501-2011 System of project documentation for construction. Execution rules working documentation architectural and constructive solutions

GOST 535-2005 Sectioned and shaped rolled products made of carbon steel of ordinary quality. General specifications

GOST 1759.0-87 Bolts, screws, studs and nuts. Specifications

GOST 1759.5-87 (ISO 898-2-80)*(1) Nuts. Mechanical properties and test methods

GOST 2991-85 Non-separable plank boxes for loads weighing up to 500 kg. General specifications

GOST 5915-70 Hexagon nuts of accuracy class B. Design and dimensions

GOST 7798-70*(2) Hexagon head bolts of accuracy class B. Design and dimensions

GOST 11371-78 Washers. Specifications

GOST 14637-89 Thick-rolled products from carbon steel ordinary quality. Specifications

GOST 15150-69 Machinery, instruments and other technical products. Versions for different climatic regions. Categories, operating conditions, storage and transportation in terms of the impact of climatic factors external environment

GOST 18123-82*(3) Washers. General specifications

GOST 23118-2012 Steel building structures. General specifications

GOST 26047-2016 Steel building structures. Symbols (brands)

GOST 26663-85 Transport packages. Formation using packaging tools. General technical requirements

GOST 27772-88 Rolled products for building structures. General specifications

NOTE When using this standard, it is advisable to check the validity of the referenced standards in information system common use on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or the annual information index "National Standards", which was published as of January 1 of the current year, and on the issues of the monthly information index "National Standards" for this year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

This standard uses the terms according to GOST 21.001, GOST 21.501 and in accordance with the current normative documents*(4).

This standard uses the terms and letter designations according to GOST 2.321, GOST 26047, as well as the following abbreviations:

KMD - detail drawings of metal structures;

POS - construction organization project;

PPR - a project for the production of works (installation).

5.1 Basic parameters and dimensions flights of stairs, rectangular platforms and fences to them must comply with those indicated in figures 1 - 4 and those given in tables 1 - 4.

In millimeters


















Note - In mid-flight stairs with an angle of inclination of 60 °, the distance h (see Figure 1) should be no more than 250 mm for lifting into the cabin of an overhead crane.

In millimeters

	900, 1200, 1500, 1800, 2100, 2400, 3000, 3600, 4200, 4800, 5400, 6000


	From 600 to 1300

Example symbol grades of a flight of stairs (ML) from a cold-formed profile (X) with stamped steps (W), at an angle of 45 ° and dimensions H = 6 dm and H = 8 dm:

MLKhSh45-6.8 GOST 23120-2016

The same, platforms (PM) from a cold-formed profile with corrugated flooring (F) and dimensions L p = 9 dm and B = 8 dm:

PMHF-9.8 GOST 23120-2016

The same, the left railing (OGl) of a flight of stairs from a cold-formed profile without a side element, at an angle of 45 ° and dimensions H og = 10 dm and H = 24 dm;

OGlMLH45-10.24 GOST 23120-2016

The same, right guard (OGp) with onboard element (Eb):

OGpMLKhEb45-10.24 GOST 23120-2016

The same, fencing of the platform from a cold-formed profile (X) with an onboard element (Eb) and dimensions H og = 10 dm and L og = 9 dm:

OGPMKhEb-10.9 GOST 23120-2016

5.2 Depending on the operating conditions, the steps of mid-flight stairs and the decking of rectangular platforms should be made of two types;

1 - solid corrugated steel (F);

2 - lattice, executions:

Ш - from stamped elements;

R - from strips on the edge and round steel;

C - from stripes to an edge in one direction;

B - from expanded steel.

5.3 Types of steps of mid-flight stairs and decking in rectangular areas are shown in Figure 5.

Figure 5 - Types of steps of mid-flight stairs and decking of rectangular platforms

5.4 Layout diagrams of mid-flight stairs, platforms and fences are given in Appendix A.

6.1 The structures of flights of stairs, landings and railings for them (hereinafter referred to as structures) should be manufactured in accordance with the requirements of GOST 23118 and this standard, according to working detail drawings (KMD) approved in the prescribed manner.

6.2 Structures should be made of carbon steel of the following grades given in Table 5.

Table 5

Steel grades		The conditions for the use of steel at design temperature t, °C
	GOST 535, GOST 14637		45 > t ≥-55


Note - The sign "+" means that this steel should be used; sign "-" - this steel should not be used.

6.3 Limit deviations linear dimensions of structures from the nominal, deviations of the shape and location of surfaces from the design ones are given in table 6.

Table 6

Dimensions in mm
Nominal size and deviation name	Limit deviations stairs, platforms, stair railings and landings
1 Lengths L k , L p, l og up to 1000 inclusive.		Drawings 1 - 4
2 Width B 1 over 1000 to 1600 incl.
3 Heights N p, N l St. 1600 to 2500 incl.
4 The distance between the ribs in the stringers and beams of the platforms l 0		Figures 1 and 2
5 Distance between guard posts l 0		Figures 3 and 4
6 Equality of diagonals (rectangularity), no more
7 Distance between hole centers within the same group A
8 Distance between groups of holes A δ
9 Deviation from straightness (δ) along the length L: up to 1000 incl. St. 1000 to 1600 incl.

6.4 Welded joints of the elements should be performed mechanically. Allowed, in the absence of equipment for welding by mechanized methods, the application of manual welding.

6.5 Materials for welding should be taken in accordance with the current regulatory documents * (5).

6.6 For bolted connections bolts of normal accuracy in accordance with GOST 7798 and GOST 1759.0, nuts in accordance with GOST 5915 and GOST 1759.5, washers in accordance with GOST 11371 and GOST 18123 and in accordance with applicable regulatory documents * (5)

6.7 Structures must be primed and painted. Priming and painting must comply with coating class V according to GOST 9.032.

6.8 Factory and assembly joints of fencing elements should not have sharp protrusions and edges.

6.9 Completeness

The structures must be supplied by the manufacturer as a complete set.

The kit should include:

Stair flights, platforms and protections to them;

Additional details for connecting structures;

Bolts, nuts and washers (supplied 10% more than the number specified in the KMD drawings);

Technical documentation in accordance with the requirements of GOST 23118.

6.10 Marking

6.10.1 Manufactured structures must be marked.

6.10.2 Attach a tag to each package or structure, which must bear the following markings:

Name or trademark of the manufacturer;

Order number;

Element mark;

The number of the KMD drawing according to which the structure is made;

date of manufacture;

Acceptance stamp technical control.

6.10.3 Each structural element shall be marked with a symbol of the element brand (without standard designation, see 5.1).

6.10.4 Markings should be applied with indelible paint on the wall of the stringer of the flight of stairs with right side along the rise, on the wall of the platform beam and on the upper edge of the railing.

6.11 Packaging

6.11.1 Packing of structural elements in packages is carried out in accordance with the requirements of GOST 26663. It should exclude their mutual displacement and damage during their loading, unloading, transportation and storage.

6.11.2 The mass of the package must not exceed 3 tons.

6.11.3 Structural fittings and fasteners should be supplied with the structures. By agreement with the customer, it is allowed to supply connecting parts separately from the structures, in which case they must be packed in wooden boxes according to GOST 2991.

7.1 Designs for verification of their compliance with the requirements of this standard shall be accepted by the technical control of the manufacturer.

7.2 Control of deviations of the linear dimensions of structures (including the dimensions of sections of rolled profiles) from the nominal ones, deviations of the shape and location of the surfaces of parts from the design ones, the quality of welded joints and surface preparation for protective coatings should be carried out before priming structures.

7.3 Acceptance of structures should be carried out in batches. The composition of the batch includes the same type of construction, made according to the same technology, from materials of the same quality.

The batch size is set by agreement between the manufacturer and the consumer.

7.4 Selective acceptance control three designs are selected from the batch, which must be subjected to piece-by-piece control for compliance with the requirements established by this standard.

7.5 If during the verification of the selected designs there is at least one design that does not comply with the requirements of this standard, twice the number of designs from the same lot should be selected and re-tested. If, upon re-checking, there is at least one design that does not meet the requirements of this standard in one of the indicators, then this batch is rejected and sent for revision.

7.6 The consumer has the right to carry out the acceptance of structures, while applying the acceptance rules and control methods established by this standard.

8.1 Control of deviations of the linear dimensions of structures from the nominal ones, deviations of the shape and location of surfaces from the design ones should be carried out by universal methods and means.

8.2 The quality control of the seams of welded joints and the dimensions of their sections should be carried out in accordance with the requirements of GOST 23118.

9.1 Structures of flights of stairs and landings should be transported element by element or in packages consisting of several elements. Fencing structures should only be transported in packages.

9.2 Structures should be transported and stored in stacks in horizontal position resting on wooden linings and gaskets. Linings must be at least 50 mm thick and at least 100 mm wide. Gaskets must be at least 20 mm thick and at least 100 mm wide.

The height of the stack should be no more than 1.5 m for fences and 2.0 m for flights of stairs and landings.

9.3 The conditions for transportation and storage of structures should be established depending on the climatic factors of the external environment in accordance with GOST 15150.

10.1 Installation of structures is carried out in accordance with the requirements of regulatory documents for installation and the rules established by POS and PPR.

10.2 Installation of structures should ensure their design position, excluding the formation of a reverse slope of steps of more than 1 °.

The manufacturer shall ensure that structures comply with the requirements of this standard subject to the conditions of transportation, storage and installation established by this standard.

_____________________________

*(1) In the Russian Federation, GOST R ISO 898-2-2013 "Mechanical properties of fasteners made of carbon and alloy steels - Part 2: Nuts of established strength classes with coarse and fine thread pitch" is in force.

*(2) In the Russian Federation, GOST R ISO 4014-2013 "Hexagon head bolts. Accuracy classes A and B" is in force.

*(3) In the Russian Federation, GOST R ISO 4759-3-2009 "Fastening products. Tolerances. Part 3. Flat round washers for bolts, screws and nuts. Accuracy classes A and C" is also valid in terms of washer tolerances.

*(4) In the Russian Federation, GOST R 21.1101-2013 "The system of design documentation for construction. Basic requirements for design and working documentation" is also in force.

*(5) SP 16.13330.2011 "SNiP II-23-81 Steel structures" is in force on the territory of the Russian Federation.

Annex A
(reference)

Figure A.1

In schemes 2 - 5 of Figure A.1, the nodes marked with a circle are made rigid in welding with the help of additional elements.

GOST 23120-2016

INTERSTATE STANDARD

STAIRCASES, PLATFORM AND STEEL FENCES

Specifications

Steel flights of steps, stair landings and railings. Specifications

MKS 91.060.30

Introduction date 2017-03-01

Foreword

1 DEVELOPED by Closed Joint-Stock Company "Central Order of the Red Banner of Labor Research and Design Institute of Building Metal Structures named after N.P. Melnikov" (CJSC "TsNIIPSK named after N.P. Melnikov")

2 INTRODUCED by the Technical Committee for Standardization TC 465 "Construction"

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Minutes of June 28, 2016 N 49)

Voted to accept:


Short name of the country according to MK (ISO 3166) 004-97		Abbreviated name of the national standards body
Armenia		Ministry of Economy of the Republic of Armenia
Belarus		State Standard of the Republic of Belarus
Kyrgyzstan		Kyrgyzstandart
Russia		Rosstandart

4 By order of the Federal Agency for Technical Regulation and Metrology dated September 26, 2016 N 1213-st, the interstate standard GOST 23120-2016 was put into effect as the national standard of the Russian Federation from March 1, 2017.

5 INSTEAD OF GOST 23120-78

Information about changes to this standard is published in the annual information index "National Standards", and the text of changes and amendments - in the monthly information index "National Standards". In case of revision (replacement) or cancellation of this standard, a corresponding notice will be published in the monthly information index "National Standards". Relevant information, notification and texts are also posted in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet (www.gost.ru)

This standard applies to steel mid-flight stairs, platforms and railings for them, used in industrial buildings and structures erected and operated at temperatures not higher than plus 100 ° C and not lower than minus 60 ° C.

This standard establishes technical requirements for mid-flight stairs with an inclination of 45 ° and 60 °, rectangular transition platforms and railings for them, made of cold-formed and hot-rolled profiles and designed for standard live loads of 200, 300 and 400 kgf / m.

This standard uses normative references to the following interstate standards:

GOST 2.321-84 Unified system for design documentation. Letter designations

GOST 9.032-74 Unified system of protection against corrosion and aging. Paint coatings. Groups, technical requirements and designations

GOST 21.001-2013 Design documentation system for construction. General provisions

GOST 21.501-2011 System of project documentation for construction. Rules for the implementation of working documentation for architectural and structural solutions

GOST 535-2005 Sectioned and shaped rolled products made of carbon steel of ordinary quality. General specifications

GOST 1759.0-87 Bolts, screws, studs and nuts. Specifications

GOST 1759.5-87 * (ISO 898-2-80)* Nuts. Mechanical properties and test methods
_______________
GOST R ISO 898-2-2013 "Mechanical properties of fasteners made of carbon and alloy steels. Part 2. Nuts of established strength classes with coarse and fine thread pitch".

GOST 2991-85 Non-separable plank boxes for loads weighing up to 500 kg. General specifications

GOST 5915-70 Hexagon nuts of accuracy class B. Design and dimensions

GOST 7798-70 * Hexagon head bolts of accuracy class B. Design and dimensions
_______________
* In the Russian Federation, GOST R ISO 4014-2013 "Hexagon head bolts. Accuracy classes A and B" is in force.

GOST 11371-78 Washers. Specifications

GOST 14637-89 Carbon steel plate of ordinary quality. Specifications

GOST 15150-69 Machinery, instruments and other technical products. Versions for different climatic regions. Categories, conditions of operation, storage and transportation in terms of the impact of environmental climatic factors

GOST 18123-82 * Washers. General specifications
_______________
* In the Russian Federation, GOST R ISO 4759-3-2009 "Fastening products. Tolerances. Part 3. Flat round washers for bolts, screws and nuts. Accuracy classes A and C" is also valid in terms of washer tolerances.

GOST 23118-2012 Steel building structures. General specifications

GOST 26047-2016 Steel building structures. Symbols (brands)

GOST 26663-85 Transport packages. Formation using packaging tools. General technical requirements

GOST 27772-88 Rolled products for building structures. General specifications

Note - When using this standard, it is advisable to check the validity of reference standards in the public information system on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or the annual information index "National Standards", which was published as of January 1 of the current year, and according to issues of the monthly information index "National Standards" for the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

This standard uses the terms according to GOST 21.001, GOST 21.501 and in accordance with the current regulatory documents **.
_______________
** In the Russian Federation, GOST R 21.1101-2013 "The system of design documentation for construction. Basic requirements for design and working documentation" is also in force.

This standard uses terms and letter designations according to GOST 2.321, GOST 26047, as well as the following abbreviations:

KMD - detail drawings of metal structures;

POS - construction organization project;

PPR - a project for the production of works (installation).

5.1 The main parameters and dimensions of flights of stairs, rectangular platforms and fences to them must correspond to those indicated in Figures 1-4 and given in Tables 1-4.

1 - kosour; 2 - step; 3 - support bar; 4 - support corner; 5 - rib

_______________
* According to KMD drawings.

Figure 1 - Flight of stairs (ML)

1 - beam;

2 - edging element; 3 - flooring; 4 - rib

_______________
* According to KMD drawings.

Figure 2 - Sites (PM)

1 - rack; 2 - handrail; 3 4 - onboard element

_______________
* According to KMD drawings.

Figure 3 - Fencing of the flight of stairs (OGM)

1 - rack; 2 - handrail; 3 - middle enclosing element; 4 - onboard element

_______________
* According to KMD drawings.

Figure 4 - Site fencing (OSF)

Table 1 - Parameters and dimensions of flights of stairs


In millimeters


















Note - In mid-flight stairs with an angle of inclination of 60 °, the distance h(see figure 1) should be no more than 250 mm for lifting into the cabin of an overhead crane.

Table 2 - Dimensions of rectangular areas


In millimeters

	600, 800, 1000
	500, 700, 900

Table 3 - Parameters and dimensions of stair railings


In millimeters

	From 1697 to 5940	479 to 790
	From 1385 to 6930	136 to 700

Table 4 - Dimensions of site fences


In millimeters

	900, 1200, 1500, 1800, 2100, 2400, 3000, 3600, 4200, 4800, 5400, 6000


	From 600 to 1300

An example of a symbol for a stair flight brand (ML) from a cold-formed profile (X) with stamped steps (Ш), at an angle of 45 ° and dimensions H=6 dm and AT=8 dm:

MLKhSh45-6.8 GOST 23120-2016

The same, platforms (PM) from a cold-formed profile with corrugated flooring (F) and dimensions = 9 dm and AT=8 dm:

PMHF-9.8 GOST 23120-2016

The same, the left railing (OGl) of the flight of stairs from a cold-formed profile without a side element, at an angle of 45 ° and dimensions = 10 dm and H=24 dm;

OGlMLH45-10.24 GOST 23120-2016

The same, right guard (OGp) with onboard element (Eb):

OGpMLKhEb45-10.24 GOST 23120-2016

The same, fencing of the platform from a cold-formed profile (X) with a side element (Eb) and dimensions = 10 dm and = 9 dm:

OGPMKhEb-10.9 GOST 23120-2016

5.2 Depending on the operating conditions, the steps of mid-flight stairs and decking of rectangular platforms should be made of two types:

1 - solid corrugated steel (F);

2 - lattice, executions:

Ш - from stamped elements;

R - from strips on the edge and round steel;

C - from stripes to an edge in one direction;

B - from expanded steel.

5.3 Types of steps of mid-flight stairs and decking in rectangular areas are shown in Figure 5.

Figure 5 - Types of steps of mid-flight stairs and decking of rectangular platforms

5.4 Layout diagrams of mid-flight stairs, platforms and fences are given in Appendix A.

6.2 Structures should be made of carbon steel of the following grades given in Table 5.

Table 5


Steel grades	Conditions for the use of steel at the design temperature t, ° С
		t<-55


Note - The sign "+" means that this steel should be used; sign "-" - this steel should not be used.

6.3 Limit deviations of the linear dimensions of structures from the nominal ones, deviations of the shape and location of surfaces from the design ones are given in Table 6.

Table 6


Dimensions in mm
Nominal size and deviation name	Limit deviations of a flight of stairs, landings, railings of a flight of stairs and landings
1 Lengths , , up to 1000 incl.		Figures 1-4
2 Width St. 1000 to 1600 incl.
3 Heights,



4 The distance between the ribs in the stringers and beams of the platforms		Figures 1 and 2
5 Distance between guard posts		Figures 3 and 4
6 Equality of diagonals (rectangularity), no more
7 Distance between hole centers within the same group A
8 Distance between groups of holes A
9 Deviation from straightness () along the length L:

6.4 Welded joints of the elements should be performed mechanically. It is allowed, in the absence of equipment for welding by mechanized methods, the use of manual welding.

6.5 Materials for welding should be taken in accordance with the current regulatory documents *.
_______________
* On the territory of the Russian Federation, SP 16.13330.2011 "SNiP II-23-81 Steel structures" is in force.

6.6 For bolted connections, bolts of normal accuracy in accordance with GOST 7798 and

6.8 Factory and assembly joints of fencing elements should not have sharp protrusions and edges.

6.9 Completeness

The structures must be supplied by the manufacturer as a complete set.

The kit should include:

- flights of stairs, landings and railings to them;

- additional details for connecting structures;

- bolts, nuts and washers (supplied 10% more than the number specified in the KMD drawings);

- technical documentation in accordance with the requirements of GOST 23118.

6.10 Marking

6.10.1 Manufactured structures must be marked.

6.10.2 Attach a tag to each package or structure, which must bear the following markings:

- name or trademark of the manufacturer;

- Order number;

- brand of the element;

- number of the KMD drawing according to which the structure was made;

- date of manufacture;

- a stamp on acceptance by technical control.

6.10.3 Each structural element shall be marked with a symbol of the element brand (without standard designation, see 5.1).

6.10.4 Markings should be applied with indelible paint on the wall of the stringer of the flight of stairs on the right side along the ascent, on the wall of the landing beam and on the upper edge of the railing.

6.11 Packaging

6.11.1 Packaging of structural elements in packages is carried out in accordance with the requirements of GOST 26663. It should exclude their mutual displacement and damage during their loading, unloading, transportation and storage.

6.11.2 The mass of the package must not exceed 3 tons.

7.1 Designs for verification of their compliance with the requirements of this standard shall be accepted by the technical control of the manufacturer.

7.2 Control of deviations of the linear dimensions of structures (including the dimensions of sections of rolled profiles) from the nominal, deviations of the shape and location of the surfaces of parts from the design ones, the quality of welded joints and surface preparation for protective coatings should be carried out before priming the structures.

7.4 During selective acceptance control, three designs are selected from the lot, which must be subjected to piece-by-piece control for compliance with the requirements established by this standard.

7.6 The consumer has the right to carry out the acceptance of structures, while applying the acceptance rules and control methods established by this standard.

8.2 The quality control of the seams of welded joints and the dimensions of their sections should be carried out in accordance with the requirements of GOST 23118.

9.1 Structures of flights of stairs and landings should be transported element by element or in packages consisting of several elements. Fencing structures should only be transported in packages.

9.2 Structures should be transported and stored in stacks in a horizontal position supported by wooden linings and pads. Linings must be at least 50 mm thick and at least 100 mm wide. Gaskets must be at least 20 mm thick and at least 100 mm wide.

The height of the stack should be no more than 1.5 m for fences and 2.0 m for flights of stairs and platforms.

9.3 The conditions for transportation and storage of structures should be established depending on the climatic factors of the external environment in accordance with GOST 15150.

10.1 Installation of structures is carried out in accordance with the requirements of regulatory documents for installation and the rules established by POS and PPR.

10.2 Installation of structures should ensure their design position, excluding the formation of a reverse slope of steps of more than 1 °.

The manufacturer shall ensure that structures comply with the requirements of this standard subject to the conditions of transportation, storage and installation established by this standard.

Annex A
(reference)

Floor height or distance between floors; H, L, V, , - nominal dimensions of the elements of stairs; - the angle of inclination of the stairs; b- step width; h- step height

Figure A.1

In diagrams 2-5 of Figure A.1, the nodes marked with a circle are made rigid for welding with the help of additional elements.


UDC 669.714.026.22:006.354			MKS 91.060.30

Keywords: steel mid-flight stairs, platforms, railings, steps, dimensions, technical requirements, acceptance rules, control methods, transportation, storage, installation instructions, manufacturer's warranties

Electronic text of the document
prepared by Kodeks JSC and verified against:
official publication
M.: Standartinform, 2016

GOST 25772-83

Group Zh34

STATE STANDARD OF THE UNION OF THE SSR

Railings for stairs, balconies and roofs
steel

General specifications

Steel guardrailing of stalrways, balconies and roofs.
General specifications

OKP 52 6200

Introduction date 1984-01-01

INFORMATION DATA

1. DEVELOPED by the Kyiv Zonal Research and Design Institute for Standard and Experimental Design of Residential and Public Buildings (KyivZNIIEP) of Gosgrazhdanstroy

DEVELOPERS

V.V. Samoylovich, Ph.D. tech. sciences (topic leader); L.B. Zaionchkovskaya; N.P. Babich; N.I. Aivazova; THEM. Karpilov; V.P. Poddubny

INTRODUCED by the State Committee for Civil Engineering and Architecture under the Gosstroy of the USSR

2. APPROVED AND INTRODUCED BY Decree of the State Committee of the USSR for Construction Affairs dated April 18, 1983 No. 72

3. Period of verification - 1995, frequency - 5 years

4. INTRODUCED FOR THE FIRST TIME

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS


		Item number













	SniP II-23-81

6. RE-ISSUED (March 1994) with Amendment No. 1 approved in May 1989 (IUS 8-89)

This standard applies to steel railings for stairs and landings, balconies and roofs.

The standard does not apply to railings of steel stairs and platforms.

1. Types, basic parameters and dimensions

1.1. According to the purpose, the fences are divided into types given in table. one.

Table 1


The purpose of the fence	Type designation
For flights of stairs:
Internal
outdoor
Preschool
For staircases:
Internal
outdoor
Preschool
For balconies:
Buildings up to 30 m high
Buildings tall St. 30 m
Preschool
Smoke-free stairwells
For roofs:
Without parapet
with parapet
Note. and - according to GOST 9818.

1.2. According to the filling of the frame, the fences are divided into types:

P - lattice;

E - screen (for hanging screens from sheet or plate materials);

K - combined (with lattice and screen areas).

1.3. The main dimensions of the fences and the dimensions between the elements of the fences must correspond to those indicated in Table. 2.

table 2


Fencing type			No more












Note. The letter designations of the dimensions ( and ) of the fences are given in the appendix.

1.4. The railings of operated roofs must be made in accordance with the requirements for balcony railings.

1.5. Steel roof railings mounted on a parapet must have a height minus the height of the parapet.

1.6. The symbol for the brand of the fence is taken in accordance with the scheme:

An example of a symbol for the brand of a staircase railing of an internal staircase with a length of 2700 and a height of 900 mm, lattice:

MV 27.12-27.9 R GOST 25772-83

The same, the railings of the landing of the outer staircase, 2400 mm long and 1200 mm high, screened:

PN - 24.12 E GOST 25772-83

The same, roof railings without a parapet 3800 long and 600 mm high, lattice:

KO - 38.6 R GOST 25772-83

2.1. Fencing should be manufactured in accordance with the requirements of this standard, GOST 23118, standards or specifications for fencing of specific types according to working drawings approved in the prescribed manner.

2.2. The quality of the surface and the appearance of the fences must correspond to standard samples approved in the prescribed manner. On the surface of the fences there should be no mechanical damage, burrs, distortions, scale or rust.

2.3. Fencing must withstand the loads provided for in SNiP 2.01.07.

2.4. Materials for steel elements of fences should be taken in accordance with SNiP II-23.

2.5. Fencing frames should be welded. Welding should be performed in accordance with SNiP III-18.

2.6. For balconies of residential buildings, with the exception of balconies of smoke-free staircases, only screen railings should be used.

2.7. The railings of stairs and balconies of preschool institutions should not have intermediate inclined and horizontal elements.

2.8. The design of screen and combined fences should be equipped with elements that provide fastening and replacement of screens.

2.9. Limit deviations of sizes and deviations of the shape of fences from the nominal ones are given in table. 3.

Table 3


	Name of indicator	Previous off
	Length :
	up to 1500 incl.
	St. 1500"3900"

	Height
	Sizes 300 or less ()
	Railing perpendicularity (except stairs)
	Specified element mating angle (for stairs)
	Straightness in the plane and from the plane of the fence with a length of:
	up to 1500 incl.
	St. 1500"3900"
	" 3900 " 7200 "
	Note. Limit deviations from straightness apply both to the fence as a whole and to its individual elements.

2.10. Fencing must be protected from corrosion in accordance with SNiP 2.03.11.

3.1. Guardrails must be supplied as a set. The package should include:

- fences;

- fasteners for screen and combined fences;

- technical documentation in accordance with the requirements of GOST 23118.

3.2. The scope of delivery does not include screens for screen and combined fences.

4.1. Guardrails must be accepted by the technical control department of the manufacturer in batches. A batch should be considered fences of the same brand, manufactured using the same technology.

The batch size is set by agreement between the manufacturer and the consumer, but not more than 200 pcs.

4.2. To control the appearance, dimensions and quality of the anti-corrosion coating, 5% of the fences are selected from different packages of each batch, but not less than 5 pcs.

4.3. If unsatisfactory control results are obtained for at least one of the quality indicators, a repeated control is carried out for this indicator on a double number of samples taken from the same batch.

If, upon re-checking, there is at least one fence that does not meet the requirements of this standard, then the entire batch is subjected to piece acceptance.

4.4. To control the fences for compliance with the requirements of clause 2.3, one fence is checked when it is put into production, when the design or manufacturing technology is changed.

4.5. The consumer has the right to conduct a control check of the compliance of fences with the requirements of this standard, while observing the above procedure for selecting fences and applying the specified control methods.

5.1. The surface quality and appearance (clause 2.2) of the selected fences are determined visually by comparison with a standard sample approved in the prescribed manner.

5.2. Control of fences for compliance with the requirements of clause 2.3 is carried out according to the test schemes for fences of specific types approved in the prescribed manner.

5.3. The quality of steel and welding consumables must be certified by certificates of suppliers or according to the laboratory of the fence manufacturer.

5.4. Quality control of welds and their dimensions (clause 2.5) should be carried out in accordance with SNiP III-18.

5.5. The linear dimensions of the fences (clause 2.9) are controlled with a class 2 tape measure according to GOST 7502, a metal ruler according to GOST 427 and a caliper according to GOST 166.

5.6. The deviation from perpendicularity (clause 2.9) is checked with a metal square with a side 1 m long, made according to drawings agreed with the State Standard, and a metal ruler in accordance with GOST 427. The square is successively applied to all four corners of the fence. One side of the square is pressed tightly against the fence and the largest gap between the second side of the square and the fence is measured with a metal ruler.

5.7. The deviation from the specified angle of conjugation of the elements of the railings of the stairs (clause 2.9) is checked with a metal square template with a side length of 1 m, made according to the drawings agreed with the State Standard, and a metal ruler in accordance with GOST 427. The square is successively applied to two obtuse corners of the fence. One side of the square is pressed tightly against the fence and the largest gap between the second side of the square and the fence is measured with a metal ruler.

5.8. The deviation from straightness (clause 2.9) is checked by measuring the gap between the fence and the string fixed at the ends of the fence or its element with a metal ruler according to GOST 427.

5.9. Quality control of protective coatings against corrosion (clause 2.10) - according to SNiP 3.04.03.

6.1. Fences are packed in packages according to the manufacturer's drawings, approved in the prescribed manner. Packaging of packages should ensure the safety of fences and protective coating from mechanical damage.

The mass of the package must not exceed 3000 kg.

The maximum dimensions of overpacks must comply with the rules for the carriage of goods.

The formation of transport packages is carried out in accordance with the rules for the carriage of goods.

Requirements for packages and packaging means must comply with GOST 21650 and GOST 24597.

6.2. The marking applied to the metal, plastic or wooden label attached to the package must contain:

- the number of fences in the package;

- mass of the package;

- package number;

- brand (stamp) of the technical control department of the manufacturer.

Transport marking should be carried out in accordance with the requirements of GOST 14192.

6.1, 6.2. (Revised edition, Rev. No. 1).

6.3. Each batch of shipped fences must be accompanied by a document containing:

- name or trademark of the manufacturer;

- name of the consumer;

- Order number;

- symbol (brand) of the fence;

- type and color of the protective coating;

- number and numbers of packages indicating the weight of each package;

- stamp of the technical control department of the manufacturer.

6.4. Steel railings should be stored by brands in packages supported by wooden linings and linings.

Linings for the lower row of fences must be at least 50 mm thick and at least 100 mm wide and laid on a flat base every 1000 mm, but not less than two per fence.

The spacers between the fences must be at least 20 mm thick and at least 100 mm wide.

6.5. When transporting fences, it is necessary to ensure the stacking of packages with a description on wooden linings and linings in accordance with clause 6.4. Fences are transported by transport of any type in accordance with the Rules for the carriage of goods in force for this type of transport.

6.6. Conditions for transportation of fences under the influence of climatic factors - OZH1, storage conditions - OZH2 according to GOST 15150.

6.5, 6.6. (Revised edition, Rev. No. 1).

7.1. Installation of fences should be carried out in accordance with the requirements of GOST 23118 and SNiP 3.03.01.

7.2. The gaps between the fencing elements and reinforced concrete slabs and marches must correspond to those indicated in Table. four.

Table 4


	Fencing type
	MV, MN, PV, PN, BP, BV and BL
	MD, PD and DB

Note. The letter designation of the size is given in the appendix.

Application
Reference

a - lattice railings of flights of stairs; b - screen and combined fences
flights of stairs; in - lattice protections of landings;
g - screen and combined railings of landings;
d - lattice railings for balconies; e-screen and combined balcony railings;
g - roof fencing without a parapet; and - roof railings with a parapet: 1 - handrail;
2 - horizontal or inclined enclosing element; 3 - vertical enclosing
element; 4 - rack; 5 - screen (shown by a dotted line); 6 - horizontal or inclined
intermediate enclosing element; 7 - steps; 8 - landing plate;
9 - balcony slab; 10 - roof level

Notes:

1. The values of the pitch of the racks and the total length of the fence are taken according to the working drawings.

2. The value of the length of the rack for sealing it or welding it to the slab or flight of stairs is taken according to the working drawings.

3. Architectural solutions of fences are conditional.

The text of the document is verified by:
official publication
M.: Publishing house of standards, 1994

GOST 23120-78

INTERSTATE STANDARD

STAIRS, PLATFORM
AND FENCES STEEL

IPK Standards Publishing House
M oscow

INTERSTATE STANDARD

Introduction date 01/01/79

This standard applies to steel mid-flight stairs, platforms and railings for them, used in industrial buildings and structures erected and operated in areas with a design temperature of minus 65 ° C and above.

The standard establishes technical requirements for mid-flight stairs with an inclination of 45 and 60 °, rectangular transition platforms and railings for them, made of cold-formed and hot-rolled profiles and designed for standard live loads of 200, 300 and 400 kgf / m 2.

Mid-flight stairs, platforms and railings for them must meet all the requirements of GOST 23118 and the requirements set forth in the relevant sections of this standard.

Table 2

	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000

Table 3

Dimensions in mm

a

Table 4


	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000


	From 600 to 1300

Symbol examplegrades of a flight of stairs (ML) from a cold-formed profile (X) with stamped steps (Sh), at an angle of 45 ° and dimensions H= 6 dm and AT= 8 dm:

MLKhSh45-6.8 GOST 23120-78

The same, platforms (PM) from a cold-formed profile with corrugated flooring (F) and dimensionsL P = 9 dm and AT= 6 dm:

PMHF-9.6 GOST 23120-78

The same, the left railing (OHl) of the flight of stairs from a cold-formed profile without a side element, at an angle of 45 ° and dimensionsH og = 10 dm and H= 24 dm:

OGlMLH45-10.24 GOST 23120-78

The same, right guard (OGp) with onboard element (Eb):

OGpMLKhEb45-10.24 GOST 23120-78

The same, platform fencing made of cold-formed profile with side element and dimensionsH og = 10 dm and L og \u003d 9 dm:

OGPMKhEb-10.9 GOST 23120-78

1.2. Depending on the operating conditions, the steps of mid-flight stairs and the decking of rectangular platforms should be made of two types:

1 - solid corrugated steel (F);

2 - lattice, executions:

Ш - from stamped elements;

R - from strips on the edge and round steel;

C - from stripes to an edge in one direction;

B - from expanded steel.

1.3. Types of steps of mid-flight stairs and decking in rectangular areas are shown in Fig. .

Types of steps of mid-flight stairs and platform decks

Crap. 5

1.4. The layout diagrams of mid-flight stairs, platforms and fences are given in the appendix.

2.1. The structures of flights of stairs, landings and railings for them (hereinafter referred to as structures) should be manufactured in accordance with the requirements of this standard, SNiP III-18 according to working drawings of KMD approved in the prescribed manner.

2.2. Structures should be made of carbon steel of class C38 / 23 of the following grades in accordance with GOST 380:

St3kp - for construction areas with an estimated outdoor temperature of minus 40 ° C and above;

St3Gps - the same, with an estimated outdoor air temperature below minus 40° C to minus 65 °C incl.

2.3. Limit deviations of the linear dimensions of structures from the nominal ones, deviations of the shape and location of surfaces from the design ones are given in Table. .

Table 5

	Previous off stairs, landings, stair railings and landings
1. Length L to; L P; L og up to 1000 incl.
2. Width AT 1 St. 1000 to 1600 incl.
3. Height H P; H l
St. 1600 to 2500 incl.
St. 2500 to 4000 incl.
St. 4000 to 8000 incl.
4. The distance between the ribs in the stringers and beams of the platforms l 0
5. Distance between fence posts l 0
6. Inequality of diagonals (non-rectangularity), no more
7. Distance between hole centers within the same group BUT
8. Distance between groups of holes BUT
9 deviation from straightness (d) along the length L:
up to 1000 incl.
St. 1000 to 1600 incl.
» 1000 » 2500 »
» 2500 » 4000 »
» 4000 » 8000 »

2.4. Welded connections of the elements must be performed in a mechanized way. It is allowed, in the absence of equipment for welding by mechanized methods, the use of manual welding.

2.5. Materials for welding must be taken in accordance with SNiP II-B.3.

2.6. For bolted connections, bolts of normal accuracy in accordance with GOST 7798 and in accordance with SNiP II-B.3 should be used.

2.7. Structures must be primed and painted. Priming and painting must comply with the fifth class of coverage in accordance with GOST 9.032.

2.8. Factory and assembly joints of fencing elements should not have sharp protrusions and edges.

3.1. The structures must be supplied by the manufacturer as a complete set.

The kit should include:

flights of stairs, platforms and fences to them;

additional details for connecting structures;

bolts, nuts and washers (supplied in quantities of 10% more than those specified in the KMD drawings);

technical documentation in accordance with the requirements of GOST 23118.

4.1. The design to verify their compliance with the requirements of this standard shall be accepted by the technical control of the manufacturer.

4.2. The control of deviations of the linear dimensions of structures (including the dimensions of sections of rolled profiles) from the nominal ones, deviations of the shape and location of the surfaces of parts from the design ones, the quality of welded joints and surface preparation for protective coatings should be carried out before priming the structures.

4.3. Acceptance of structures must be carried out in batches. The composition of the batch includes the same type of construction, made according to the same technology, from materials of the same quality.

The batch size is established by agreement between the manufacturer and the consumer.

4.4. During selective acceptance control, the designs selected from the batch in the amount of 3 pcs. must be subjected to piece-by-piece control for compliance with the requirements established by this standard.

4.5. If during the inspection of the selected designs there is at least one design that does not comply with the requirements of this standard, double the number of designs from the same lot should be selected and re-tested. If, upon re-checking, there is at least one design that does not meet the requirements of this standard in one of the indicators, then this batch is rejected and sent for revision.

4.6. The consumer has the right to accept the structures, while applying the acceptance rules and control methods established by this standard.

5.1. The control of deviations of the linear dimensions of structures from the nominal ones, deviations of the shape and location of surfaces from the design ones should be carried out by universal methods and means.

5.2. The quality control of the seams of welded joints and the dimensions of their sections should be carried out in accordance with SNiP III-18.

6.1. Fabricated designs must be marked.

6.2. Structures of flights of stairs and landings must be transported element by element or in packages consisting of several elements. Fencing structures should only be transported in packages.

6.3. The method of connecting structural elements into packages should exclude their mutual displacement and damage during transportation and storage.

6.4. A tag is attached to each package or to the structure, on which the following markings should be applied:

Order number;

number of the KMD drawing according to which the structure is made.

6.5. On each structural element, a symbol of the element brand must be applied (without a standard designation, see p.).

6.6. Markings should be applied with indelible paint on the wall of the stringer of the flight of stairs on the right side along the ascent, on the wall of the landing beam and on the upper edge of the railing.

6.7. Structural fittings must be supplied with the structures. By agreement with the customer, it is allowed to supply connecting parts separately from the structures, in which case they must be packed in wooden boxes in accordance with GOST 2991.

6.8. The mass of the package should not exceed 3 tons.

6.9. Structures should be transported and stored in stacks in a horizontal position supported by wooden linings and pads. Linings must be at least 50 mm thick and at least 100 mm wide. Gaskets must be at least 20 mm thick and at least 100 mm wide.

The height of the stack should be no more than 1.5 m - for fences and 2.0 m - for marches and platforms.

H e - floor height or distance between floors; H, L, B, L P, H og - the nominal dimensions of the elements of the stairs;
a- the angle of the stairs ; b- step width; h- step height

USSR STATE COMMITTEE
CONSTRUCTION

DEVELOPED AND INTRODUCED of the Order of the Red Banner of Labor by the Central Research and Design Institute of Building Metal Structures (TsNIIprojectstalkonstruktsiya) of the USSR State Construction Committee

All-Union Scientific Research and Design and Technology Institute (VNIKTIstalkonstruktsiya) of the USSR MinmontazhSpetsstroy

All-Union State Design Institute for the Industrialization of Installation Works (Gipromontazhindustriya) of the USSR Ministry of Installation and Special Construction

PERFORMERS

V. M. Laptev(topic leader) L. A. Peskova, S. I. Bochkova, A. F. Gai, L. M. Dudilovsky, B. A. Shtepa

APPROVED AND INTRODUCED BY Decree of the State Committee of the Council of Ministers of the USSR for Construction of April 28, 1978 No. 71

STATE STANDARD OF THE UNION OF THE SSR

By the Decree of the State Committee of the Council of Ministers of the USSR for Construction of April 28, 1978 No. 71, the validity period is established

from 01.01.1979

until 01.01.1984

Mid-flight stairs, platforms and railings for them must meet all the requirements of GOST 23118-78 and the requirements set forth in the relevant sections of this standard.

1.1. The main parameters and dimensions of flights of stairs, rectangular platforms and railings to them must correspond to those indicated in Fig. 1 - 4 and in table. fourteen.

Flight of stairs

* According to KMD drawings.

1 - kosour; 2 - step; 3 - support bar; 4 - support corner; 5 - rib

Table 1

Dimensions in mm

a		L

Venues

* According to KMD drawings.

1 - beam; 2 - edging element; 3 - flooring; 4 - rib

table 2

	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000

Stair railing

* According to KMD drawings.

1 - rack; 2 - handrail 3 4 - onboard element

Table 3

Dimensions in mm

Site fencing

* According to KMD drawings.

1 - rack; 2 - handrail 3 - middle enclosing element; 4 - onboard element

Table 4


	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000


	From 600 to 1300

An example of a symbol for the brand of a flight of stairs (ML) from a cold-formed profile (X) with stamped steps (Sh), at an angle of 45 ° and dimensions H= 6 dm and AT= 8 dm:

The same, platforms (PM) from a cold-formed profile with corrugated flooring (F) and dimensions L n= 9 dm and AT= 6 dm:

The same, the left railing (OHl) of the flight of stairs from a cold-formed profile without a side element, at an angle of 45 ° and dimensions H or= 10 dm and H= 24 dm:

The same, right guard (OGp) with onboard element (Eb):

The same, platform fencing made of cold-formed profile with side element and dimensions H or= 10 dm and L or= 9 dm:

1.2. Depending on the operating conditions, the steps of mid-flight stairs and the decking of rectangular platforms should be made of two types:

1 - solid corrugated steel (F);

2 - lattice, executions:

Ш - from stamped elements;

R - from strips on the edge and round steel;

C - from stripes to an edge in one direction;

B - from expanded steel.

1.3. Types of steps of mid-flight stairs and decking in rectangular areas are shown in Fig. 5.

1.4. The layout diagrams of mid-flight stairs, platforms and fences are given in the appendix.

Types of steps of mid-flight stairs and platform decks

Type 1. Solid (F)

Type 2. Latticed

Version W Version R

Version C Version B

2.1. The structures of flights of stairs, platforms and railings for them (hereinafter referred to as structures) should be manufactured in accordance with the requirements of this standard, SNiP III-18-75 according to working drawings of KMD approved in the prescribed manner.

2.2. Structures should be made of carbon steel of class C38 / 23 of the following grades in accordance with GOST 380-71:

Vst3kp2 - for construction areas with an estimated outdoor temperature of minus 40 ° C and above;

VSt3Gps5 - the same, with an estimated outdoor air temperature below minus 40 °C to minus 65 °C inclusive.

2.3. Limit deviations of the linear dimensions of structures from the nominal ones, deviations of the shape and location of surfaces from the design ones are given in Table. 5.

2.4. Welded connections of the elements must be performed in a mechanized way. It is allowed, in the absence of equipment for welding by mechanized methods, the use of manual welding.

2.5. Materials for welding should be taken in accordance with SNiP II-B.3-72.

2.6. For bolted connections, bolts of normal accuracy in accordance with GOST 7798-70 and in accordance with SNiP II-B.3-72 should be used.

2.7. Structures must be primed and painted. Priming and painting must comply with the fifth class of coverage in accordance with GOST 9.032-74.

2.8. Factory and assembly joints of fencing elements should not have sharp protrusions and edges.

Table 5

Nominal size and deviation name		Previous off stairs, landings, stair railings and landings
Length L to; L p; L or	up to 1000 incl.		Crap. fourteen
Width IN 1	St. 1000 to 1600 incl.
Height N p; H l	St. 1600 to 2500 incl.
	St. 2500 to 4000 incl.
	St. 4000 to 8000 incl.
The distance between the ribs in the stringers and beams of the platforms lo			Crap. 1 and 2
Distance between guard posts lo			Crap. 3 and 4
Inequality of diagonals (non-rectangularity), no more
Distance between hole centers within the same group A
Distance between groups of holes A
Non-straightness ( d) by lenght L:
up to 1000 incl.
St. 1000 to 1600 incl.
» 1000 » 2500 »
» 2500 » 4000 »
» 4000 » 8000 »

3.1. The structures must be supplied by the manufacturer as a complete set.

The kit should include:

flights of stairs, platforms and fences to them;

additional details for connecting structures;

bolts, nuts and washers (supplied in quantities of 10% more than those specified in the KMD drawings);

technical documentation in accordance with the requirements of GOST 23118-78.

4.1. The design to verify their compliance with the requirements of this standard shall be accepted by the technical control of the manufacturer.

The batch size is established by agreement between the manufacturer and the consumer.

4.6. The consumer has the right to accept the structures, while applying the acceptance rules and control methods established by this standard.

5.2. The quality control of the seams of welded joints and the dimensions of their sections should be carried out in accordance with SNiP III-18-75.

6.1. Fabricated designs must be marked.

6.2. Structures of flights of stairs and landings must be transported element by element or in packages consisting of several elements. Fencing structures should only be transported in packages.

6.3. The method of connecting structural elements into packages should exclude their mutual displacement and damage during transportation and storage.

6.4. A tag is attached to each package or to the structure, on which the following markings should be applied:

Order number;

number of the KMD drawing according to which the structure is made.

6.5. Each structural element must be marked with a symbol of the element brand (without a standard designation, see clause 1.1).

6.8. The mass of the package should not exceed 3 tons.

The height of the stack should be no more than 1.5 m - for fences and 2.0 m - for marches and platforms.

7.1. Installation of structures must be carried out in accordance with the requirements of GOST 23118-78 and SNiP III-18-75.

7.2. Installation of structures should ensure their design position, excluding the formation of a reverse slope of steps of more than 1 °.

8.1. The manufacturer shall ensure that structures comply with the requirements of this standard subject to the conditions of transportation, storage and installation established by this standard.

N e- floor height or distance between floors; H, L, B, L p, H or- nominal dimensions of ladder elements; a- the angle of the stairs ; b- step width; h- step height

In schemes 2 - 5, the nodes circled are made rigid for welding with the help of additional elements.

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