Flight stairs, platforms and steel railings. Flight stairs, platforms and railings steel conditions Basic parameters and dimensions

GOST 23120-78

INTERSTATE STANDARD

STAIRS STAIRS, PLOTS
AND STEEL FENCES

IPK Standards Publishing House
M osqua

INTERSTATE STANDARD

Date of introduction 01.01.79 g.

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

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

Marching stairs, platforms and fences to them must meet all the requirements of GOST 23118 and the requirements set out in the relevant sections of this standard.

1. Basic parameters and dimensions

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


	600 to 1300

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

MLHSh45-6.8 GOST 23120-78

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

PMHF-9.6 GOST 23120-78

The same, the left handrail (ОГл) of the staircase 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, the right fence (OGp) with an onboard element (Eb):

OGpMLHEb45-10.24 GOST 23120-78

The same for the platform fencing made of a cold-formed profile with a side element and dimensionsH og = 10 dm and L og = 9 dm:

OGPMHEb-10.9 GOST 23120-78

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

1 - solid corrugated steel (F);

2 - lattice, versions:

Ш - from stamped elements;

P - from strips to the edge and round steel;

C - from stripes per edge in one direction;

B - from expanded steel.

1.3. The types of steps of mid-flight stairs and floorings in rectangular platforms are shown in Fig. ...

Types of steps of mid-flight stairs and platform decking

Crap. 5

1.4. Layout diagrams of flight stairs, platforms and fences are given in the appendix.

2. Technical requirements

2.1. Structures of flights of stairs, platforms and fences to 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 structural steelwork, approved in the prescribed manner.

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

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

St3Gps - the same, with a design outside air temperature below minus 40° C to minus 65 ° C incl.

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

Table 5

	Prev off stairs, landing, stairway fences and landings
1. Length L To; L P; L og up to 1000 incl.
2. Width V 1 St. 1000 to 1600 incl.
3. Height N P; N 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 sites l 0
5. Distance between fence posts l 0
6. Inequality of diagonals (non-rectangularity), no more
7. Distance between hole centers within one group A
8. Distance between groups of holes A
9 deviation from straightness (d) in length L:
up to 1000 incl.
St. 1000 to 1600 incl.
"1000" 2500 "
"2500" 4000 "
"4000" 8000 "

2.4. Welded joints of elements must be performed mechanically. 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 accepted 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. The primer and painting must correspond to the fifth class of coating in accordance with GOST 9.032.

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

3. Completeness

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 an amount 10% more than specified in the KMD drawings);

technical documentation in accordance with the requirements of GOST 23118.

4. Acceptance rules

4.1. Designs to verify compliance with the requirements of this standard must be adopted by the technical control of the manufacturer.

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

4.3. Acceptance of structures must be carried out in batches. The batch includes structures of the same type, made using 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 structures selected from the batch in the amount of 3 pcs. must be subjected to piecewise control for compliance with the requirements established by this standard.

4.5. If, when checking selected structures, there is at least one structure that does not meet the requirements of this standard, you should select a double number of structures from the same batch and conduct them re-check... If, upon repeated inspection, there is at least one design that does not meet the requirements of this standard for one of the indicators, then this batch is rejected and sent for revision.

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

5. Methods of control

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

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

6. Marking, packaging, transportation and storage

6.1. Manufactured structures 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. Fence 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 structure, on which the following markings should be applied:

Order number;

the number of the KMD drawing, according to which the structure was made.

6.5. Each structural element must be applied symbol element brands (without designation of the standard, see p.).

6.6. Markings should be applied with indelible paint on the wall of the staircase stringer on the right side along the ascent, on the wall of the platform beam and on the upper edge of the guardrail.

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

6.8. Package weight should not exceed 3 tons.

6.9. Structures should be transported and stored in stacks in a horizontal position with support on wooden pads and spacers. The pads must be at least 50 mm thick and at least 100 mm wide. Spacers 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.

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

GOST 23120-78

Group W34

STATE STANDARD OF THE UNION OF SSR

STEEL STAIRS, STEEL PLATES AND FENCES

Technical conditions

Steel flights of steps, stair landings and railings.
Specifications

Date of introduction 1979-01-01

INFORMATION DATA

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

All-Union Scientific Research and Design Technological Institute (VNIKTIstalkonstruktsiya)

All-Union State Design Institute for Industrialization installation works(Gipromontazhindustriya) USSR Ministry of Montazhspetsstroy

DEVELOPERS

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

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

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS


	Item number
GOST 9.032-74
GOST 380-88
GOST 2991-85
GOST 7798-70
	Preamble, 3.1, 7.1
SNiP II-V.3-72

5. REPUBLICATION. May 1992

6. By the decree of the State Committee of the USSR for Construction Affairs No. 354 of 02/29/84, the limitation of the validity period was lifted

This standard applies to steel staircases, platforms and fences to 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 angle of inclination of 45 and 60 °, rectangular transition platforms and railings for them, made of cold-formed and hot-rolled profiles and designed for the action of standard temporary loads of 200, 300 and 400.

Marching stairs, platforms and fences to them must meet all the requirements of GOST 23118 and the requirements set out in the relevant sections of this standard.

1. Basic parameters and dimensions

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

An example of a symbolic designation of a stairway brand (ML) from a cold-formed profile (X) with stamped steps (W), at an angle of 45 ° and dimensions of 6 dm and 8 dm:

MLHSh45-6.8 GOST 23120-78

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

PMHF-9.6 GOST 23120-78

The same for the left handrail (OGl) of a staircase made of a cold-formed profile without a side element, at an angle of 45 ° and dimensions = 10 dm and 24 dm;

OGlMLH45-10.24 GOST 23120-78

The same, the right fence (OGp) with an onboard element (Eb):

OGpMLHEb45-10.24 GOST 23120-78

The same for the platform fences made of a cold-formed profile with a side element and dimensions = 10 dm and = 9 dm:

OGPMHEb-10.9 GOST 23120-78

Flight of stairs

1 - stringer;

2 - stage;

3 - support bar; 4 - support corner; 5 - rib

Damn 1

Playgrounds

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

___________________
* According to KMD drawings.

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

1 - solid corrugated steel (F);

2 - lattice, versions:

Ш - from stamped elements;

P - from strips to the edge and round steel;

C - from stripes per edge in one direction;

B - from expanded steel.

1.3. The types of steps of flight stairs and floorings in rectangular platforms are shown in Fig. 5.

1.4. Layout diagrams of flight stairs, platforms and fences are given in the appendix.

Table 1

Dimensions in mm

table 2



	600; 800; 1000

2. Technical requirements

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

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

St3Gps - the same, with the design temperature of the outside air below minus 40 to minus 65 ° C incl.

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

Staircase railing

1 - rack;

2 - handrail, 3 - middle enclosing element; 4 - side element

___________________
* According to KMD drawings.

Site fencing

___________________
* According to KMD drawings.

Table 3

Dimensions in mm

2.4. Welded joints of elements must be performed mechanically. 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 accepted in accordance with SNiP II-B.3.

Table 4


	1000; 1200
	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000


	600 to 1300

Types of steps of mid-flight stairs and platform decking

Type 1. Solid (F)

Type 2. Lattice

Version W Version R

Version C Version B

Damn 5

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. The primer and painting must correspond to the V class of the coating according to GOST 9.032.

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

Table 5


Nominal size and name of deviation	Prev off stairs, landing, stairway fences and landings
1. Length; ; up to 1000 incl.
2. Width of St. 1000 to 1600 incl.		Damn 1-4
3. Height:
St. 1600 to 2500 incl.


4. The distance between the ribs in the stringers and beams of the sites		Damn 1 and 2
5. Distance between fence posts		Heck 3 and 4
6. Inequality of diagonals (non-rectangularity), no more
7. The distance between the centers of the holes within one group A
8. Distance between groups of holes A
9. Deviation from straightness by lenght :
up to 1000 incl.
St. 1000 to 1600 incl.

3. Completeness

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 an amount 10% more than specified in the KMD drawings);

technical documentation in accordance with the requirements of GOST 23118.

4. Acceptance rules

4.1. Designs to verify compliance with the requirements of this standard must be adopted by the technical control of the manufacturer.

4.2. Control of deviations of linear dimensions of structures (including dimensions of sections of rolled profiles) from nominal, deviations of the shape and location of surfaces of parts from the design, 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 batch includes structures of the same type, made using the same technology, from materials of the same quality.

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

4.5. If, when checking selected structures, there is at least one structure that does not meet the requirements of this standard, a double number of structures from the same batch should be selected and re-checked. If, upon repeated inspection, there is at least one design that does not meet the requirements of this standard for one of the indicators, then this batch is rejected and sent for revision.

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

5. Methods of control

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

6. Marking, packaging, transportation and storage

6.1. Manufactured structures 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. Fence 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 structure, on which the following markings should be applied:

Order number;

the number of the KMD drawing, according to which the structure was made.

6.5. Each structural element must bear the symbol of the element brand (without designation of the standard, see clause 1.1).

6.6. Markings should be applied with indelible paint on the wall of the staircase stringer on the right side along the ascent, on the wall of the platform beam and on the upper edge of the guardrail.

6.8. Package weight should not exceed 3 tons.

7. Installation instructions

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

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

8. Manufacturer's Warranties

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

Application (reference). Layout diagrams of flight stairs

Appendix
Reference

Floor height or distance between slabs;
,, - nominal dimensions of staircase elements;
- the angle of inclination of the stairs; - step width; - step height

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

The text of the document is verified by:
official publication
Ministry of Construction of Russia -
Moscow: Standards Publishing House, 1992

For the manufacture of critical structures, it is customary to use GOST standards in construction. Metal stairs and railings belong to this type of structure, therefore, certain standards are applied in the design and manufacture of these products.

The regulatory documents and drawings must indicate the requirements for the material used in the manufacture of stairs, for the permissible dimensions and method of placing products in the building plan.

To describe the conditions for the manufacture and installation of metal stairs and fences, GOST have been developed:

GOST R 53254 - 2009. It accumulates standards for the production and installation of metal fire escapes and fences for these products at industrial and civil construction;
GOST 23120-78. Reflects the standards for the production of steel stairs;
GOST 25772 83. Provides standards and design characteristics for fences used in the construction of flights of stairs and for the organization of safety barriers on roofs and balconies;
GOST 26887-86. The regulatory document allows you to determine the characteristics of attached metal stairs, platforms, stationary vertical products. In addition, it describes standards for portable ladders, made of aluminum, which are used for construction work.

Standards GOST 23120 78

The normative document provides for the arrangement of platforms, fences and metal stairs. GOST 23120 78 is mandatory when installing products at an outdoor temperature of up to -65 C o.

In construction, when installing these elements, the following rules are used:

elements of products must provide resistance to loads within 200-400 s;
the angle of the flight of stairs to the opposite wall varies within 45-60 degrees;
the width of the steps varies from 500 to 900 mm with a slope of 45 degrees;
the width of the steps, with a slope of 60 degrees, should be from 500 to 700 mm;
the maximum height of the march varies from 4.2 m for a slope of 45 degrees and up to 6.0 m for a slope of 60 degrees;
the height of the fence varies from 1000 to 1200 mm;
structural elements manufactured in the workshop are processed in such a way as not to cause injury to persons using this product;
to prevent slipping of a person's foot on the surface of steps, their inclination should not exceed one degree.

Inclination angles of the main staircase.

Standards GOST R 53254-2009

This standard regulates the production and placement of metal ladders at the installation sites for organizing evacuation and emergency descents in industrial and civil buildings, as well as for arranging portable structures.

In the manufacture of metal stairs, Gosstandart provides the following requirements:

tread depth should not exceed 250 mm;
the width of each step must be at least 900 mm;
fence height - not less than 1200 mm;
if the height of the flight of stairs exceeds 20 m, it is required to use exclusively marching products;
with a lifting height of less than 20 m, it is possible to use vertical products;
if two flights of stairs are located in close proximity, an opening of 750 mm or more must be observed between them;
fire escapes in mandatory protect with anti-corrosion paints or varnishes.

The dimensions of the steps.

GOST for vertical metal stairs prescribes the following standards:

to ensure safety, the lower span of a fixed staircase must be retractable;
in the places of installation of embedded parts for installing a vertical ladder there should be no cracks and chips that violate the integrity of the surface;
the fastening of fire escapes is obliged to ensure the safe descent of an adult;
each step must withstand a vertical load of 180 kgf applied to the center point of the structural element;
the degree of load for the fencing of the structure must be 54 kgf or more;
the distance between the extreme points of the steps vertically is limited to 350 mm;
indent from the supporting surface to the edge of the structure - from 300 mm;
the distance from the lowest point of the extreme step to the ground is limited to 1500 mm;
the size of steps in width is allowed from 600 mm for structures without a fence, and at least 800 mm for products with a fence;
service stationary stairs according to building codes, it is carried out at least once every 5 years.

Dimensions of vertical stairs.

Standards GOST 26887-86

Requirements to metal stairs oblique and vertical type are established by this standard. The standard takes into account the manufacture and use aluminum stairs of various types.

The state regulation contains the following rules for the production and installation of stairs:

the width of the staircase is set from 0.9 m;
for one flight of stairs, the maximum number of steps is set - 18 pieces;
the minimum step height is up to 160 mm, and the maximum one does not exceed 200 mm;
the depth of the step (tread) for a vertical staircase should be 0.3 m;
the depth of the tread for a spiral staircase varies from 100 mm at the point of internal attachment, to 400 mm at the extreme point against the wall;
if the width of the staircase is more than 110 cm, it is necessary to provide for the device of double-sided fences;
fence height for indoor spaces varies from 90 cm to 120 cm, with handrail device 55-85 mm wide;
if the ladder is installed in residential buildings where small children live, the fence is equipped with an additional handrail at a height of 450 mm;
gap between vertical posts fences are allowed within 150 mm;
when designing a staircase in production, it should be borne in mind that the fence must maintain a resistance of more than 100 kg per running meter.

Height of handrails.

Requirements for fences in accordance with GOST 25772 83

This standard establishes the standards for the arrangement stair railings for marches equipped with more than three steps. It applies to balcony stairs and roof rails.

When installing iron fences of this type, you should adhere to the rules:

The resistance of the fence to loads must be at least 40 kgf when forces are applied in any direction;
The deflection of the rolled metal used at the specified load should not exceed 50 mm;
The outer supports of the product are processed special formulations, excluding the possibility of sliding;
When organizing paired ladder fences, the span between the right and left bowstrings should not be less than 400 mm and more than 800 mm;
The offense is recommended to be performed within 300-340 mm;
The span from the site from which the ascent is carried out to the extreme step is provided for up to 0.4 m;
When organizing vertical ladders with a height of more than 5 m, it is necessary to arrange a semicircular rear fence or provide for a cable attachment to attach a safety belt;
The distance between the arcs of a semicircular fence is possible up to 800 mm. To strengthen this structure, the use of three vertical braces is required. Distance from extreme point the arc to the inner surface of the march varies from 700 to 800 mm;
Steel fences are serviced once a year. When tested under load, the rigidity of the structure must be 20% higher than the standard.

Variants of the surface of the steps.

Compliance of fences and stairs with SNIP and GOST allows you to achieve safe infrastructure in residential and industrial premises.

GOST 23120-78

Group W34

STATE STANDARD OF THE UNION OF SSR

STEEL STAIRS, STEEL PLATES AND FENCES

Technical conditions

Steel flights of steps, stair landings and railings.
Specifications

Date of introduction 1979-01-01

INFORMATION DATA

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

All-Union Scientific Research and Design Technological Institute (VNIKTIstalkonstruktsiya)

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

DEVELOPERS

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

2. APPROVED AND INTRODUCED INTO EFFECT by the Resolution of the State Committee of the Council of Ministers of the USSR for Construction of April 28, 1978 No. 71

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS


	Item number
GOST 9.032-74
GOST 380-88
GOST 2991-85
GOST 7798-70
	Preamble, 3.1, 7.1
SNiP II-V.3-72

5. REPUBLICATION. May 1992

1. Basic parameters and dimensions

MLHSh45-6.8 GOST 23120-78

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

PMHF-9.6 GOST 23120-78

The same for the left handrail (OGl) of a staircase made of a cold-formed profile without a side element, at an angle of 45 ° and dimensions = 10 dm and 24 dm;

OGlMLH45-10.24 GOST 23120-78

The same, the right fence (OGp) with an onboard element (Eb):

OGpMLHEb45-10.24 GOST 23120-78

The same for the platform fences made of a cold-formed profile with a side element and dimensions = 10 dm and = 9 dm:

OGPMHEb-10.9 GOST 23120-78

Flight of stairs

1 - stringer;

2 - stage;

3 - support bar; 4 - support corner; 5 - rib

Damn 1

Playgrounds

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

___________________
* According to KMD drawings.

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

1 - solid corrugated steel (F);

2 - lattice, versions:

Ш - from stamped elements;

P - from strips to the edge and round steel;

C - from stripes per edge in one direction;

B - from expanded steel.

1.3. The types of steps of flight stairs and floorings in rectangular platforms are shown in Fig. 5.

1.4. Layout diagrams of flight stairs, platforms and fences are given in the appendix.

Table 1

Dimensions in mm

table 2



	600; 800; 1000

2. Technical requirements

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

Staircase railing

1 - rack;

2 - handrail, 3 - middle enclosing element; 4 - side element

___________________
* According to KMD drawings.

Site fencing

___________________
* According to KMD drawings.

Table 3

Dimensions in mm

2.4. Welded joints of elements must be performed mechanically. 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 accepted in accordance with SNiP II-B.3.

Table 4


	1000; 1200
	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000


	600 to 1300

Types of steps of mid-flight stairs and platform decking

Type 1. Solid (F)

Type 2. Lattice

Version W Version R

Version C Version B

Damn 5

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. The primer and painting must correspond to the V class of the coating according to GOST 9.032.

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

Table 5


Nominal size and name of deviation	Prev off stairs, landing, stairway fences and landings
1. Length; ; up to 1000 incl.
2. Width of St. 1000 to 1600 incl.		Damn 1-4
3. Height:
St. 1600 to 2500 incl.


4. The distance between the ribs in the stringers and beams of the sites		Damn 1 and 2
5. Distance between fence posts		Heck 3 and 4
6. Inequality of diagonals (non-rectangularity), no more
7. The distance between the centers of the holes within one group A
8. Distance between groups of holes A
9. Deviation from straightness by lenght :
up to 1000 incl.
St. 1000 to 1600 incl.

3. Completeness

4. Acceptance rules

4.1. Designs to verify compliance with the requirements of this standard must be adopted by the technical control of the manufacturer.

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

5. Methods of control

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

6. Marking, packaging, transportation and storage

6.1. Manufactured structures 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. Fence 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 structure, on which the following markings should be applied:

Order number;

the number of the KMD drawing, according to which the structure was made.

6.5. Each structural element must bear the symbol of the element brand (without designation of the standard, see clause 1.1).

6.6. Markings should be applied with indelible paint on the wall of the staircase stringer on the right side along the ascent, on the wall of the platform beam and on the upper edge of the guardrail.

6.8. Package weight should not exceed 3 tons.

7. Installation instructions

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

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

8. Manufacturer's Warranties

Application (reference). Layout diagrams of flight stairs

Appendix
Reference

Floor height or distance between slabs;
,, - nominal dimensions of staircase elements;
- the angle of inclination of the stairs; - step width; - step height

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

The text of the document is verified by:
official publication
Ministry of Construction of Russia -
Moscow: Standards Publishing House, 1992

STATE STANDARD OF THE UNION OF SSR

STAIRS STAIRS,
AREAS AND FENCES
STEEL

TECHNICAL CONDITIONS

GOST 23120-78

STATE COMMITTEE OF THE USSR
CONSTRUCTION

Moscow

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

All-Union Scientific Research and Design Technological Institute (VNIKTIstalkonstruktsiya)

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

CONTRACTORS

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

APPROVED AND INTRODUCED INTO ACTION by the 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 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 period of validity is established

from 01.01.1979

before 01.01.1984

This standard applies to steel staircases, platforms and fences to 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 marching stairs with an angle of inclination of 45 and 60 °, rectangular transition platforms and railings for them, made of cold-formed and hot-rolled profiles and designed for the action of standard temporary loads of 200, 300 and 400 kgf / m 2.

Marching stairs, platforms and fences to them must meet all the requirements of GOST 23118-78 and the requirements set out in the relevant sections of this standard.

1. Basic parameters and dimensions

1.1. The main parameters and dimensions of flights of stairs, rectangular platforms and fences to them must correspond to those indicated in the drawing. 1 - 4 and in table. 14 .

Flight of stairs

____________

* According to KMD drawings.

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

Crap. one

Table 1

Dimensions in mm

a	H	L	h	b	B	B 1	B 1
45 °
	1200	1200
	1800	1800
	2400	2400
	3000	3000			1000
	3600	3600
	4200	4200
60 °
	1200
	1800	1039
	2400	1386
	3000	1732
	3600	2078
	4200	2425
	4800	2771
	5400	3118
	6000	3464

Playgrounds

______________

* According to KMD drawings.

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

Crap. 2

Table 2

L n	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000
B
B 1

Staircase railing

____________

* According to KMD drawings.

1 - rack; 2 - handrail, 3 4 - side element

Crap. 3

Table 3

Dimensions in mm

a	H or	L or	h o	h	l o

Site fencing

____________

* According to KMD drawings.

1 - rack; 2 - handrail, 3 - middle enclosing element; 4 - side element

Crap. 4

Table 4

H or	1000; 1200
L or	900; 1200; 1500; 1800; 2100; 2400; 3000; 3600; 4200; 4800; 5400; 6000
h o	140
h
l o	600 to 1300

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

MLHSh45-6.8 GOST 23120-78

The same, platforms (PM) from a cold-formed profile with corrugated decking (F) and dimensionsL n= 9 dm and V= 6 dm:

PMHF-9.6 GOST 23120-78

The same, the left handrail (ОГл) of the staircase from a cold-formed profile without a side element, at an angle of 45 ° and dimensionsH or= 10 dm and H= 24 dm:

OGlMLH45-10.24 GOST 23120-78

The same, the right fence (OGp) with an onboard element (Eb):

OGpMLHEb45-10.24 GOST 23120-78

The same for the platform fencing made of a cold-formed profile with a side element and dimensionsH or= 10 dm and L or= 9 dm:

OGPMHEb-10.9 GOST 23120-78

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

1 - solid corrugated steel (F);

2 - lattice, versions:

Ш - from stamped elements;

P - from strips to the edge and round steel;

C - from stripes per edge in one direction;

B - from expanded steel.

1.3. The types of steps of mid-flight stairs and floorings in rectangular platforms are shown in Fig. 5 .

1.4. Layout diagrams of flight stairs, platforms and fences are given in the appendix.

Types of steps of mid-flight stairs and platform decking

Type 1. Solid (F)

Type 2. Lattice

Version W Version R

Version C Version B

Crap. 5

2. Technical requirements

2.1. Structures of flights of stairs, platforms and fences to them (hereinafter referred to as structures) should be made in accordance with the requirements of this standard, SNiP III-18-75 according to working drawings of the structural design, approved in the prescribed manner.

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

ВСт3кп2 - for construction areas with an estimated outside air temperature of minus 40 ° С and above;

VSt3Gps5 - the same, with the design outside air temperature below minus 40° C to minus 65 ° C incl.

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

2.4. Welded joints of elements must be performed mechanically. 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 accepted in accordance with SNiP II-B.3-72.

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

2.7. Structures must be primed and painted. The primer and painting must correspond to the fifth class of coating 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 name of deviation		Prev off stairs, landing, stairway fences and landings	Sketch
Length L to; L p; L or	up to 1000 incl.	± 1.6	Crap. 14
Width IN 1	St. 1000 to 1600 incl.	± 2.0
Height N p; N l	St. 1600 to 2500 incl.	± 2.5
	St. 2500 to 4000 incl.	± 3.0
	St. 4000 to 8000 incl.	± 4.0
Distance between ribs in stringers and beams of sitesl o		± 2.0	Crap. 1 and 2
Distance between fence postsl o		± 2.0	Crap. 3 and 4
Inequality of diagonals (non-rectangularity), no more
Distance between hole centers within one group A		± 1.3
Distance between groups of holes A		± 2.5
Non-straightness (d ) by lenghtL:
up to 1000 incl.
St. 1000 to 1600 incl.
"1000" 2500 "
"2500" 4000 "
"4000" 8000 "

3. Completeness

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 an amount 10% more than specified in the KMD drawings);

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

4. Acceptance rules

4.1. Designs to verify compliance with the requirements of this standard must be adopted by the technical control of the manufacturer.

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

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

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

5. Methods of control

5.2. Quality control of welded joints and the dimensions of their cross-sections must be carried out in accordance with SNiP III-18-75.

6. Marking, packaging, transportation and storage

6.1. Manufactured structures 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. Fence 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 structure, on which the following markings should be applied:

Order number;

the number of the KMD drawing, according to which the structure was made.

6.5. Each structural element must bear the symbol of the element brand (without designation of the standard, see clause 1.1).

6.6. Markings should be applied with indelible paint on the wall of the staircase stringer on the right side along the ascent, on the wall of the platform beam and on the upper edge of the guardrail.

6.8. Package weight 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. Installation instructions

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. Manufacturer's Warranties

Appendix
Reference

Layout diagrams of flight stairs

N e- floor height or distance between floors; H, L, B, L p, H or- nominal dimensions of staircase elements; a - angle of inclination of 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.

1. Basic parameters and dimensions .. 2

2. Technical requirements . 6

3. Completeness . 8

4. Acceptance rules . 8

5. Methods of control . 8

6. Marking, packaging, transportation and storage . 8

7. Installation instructions . 9

8. Manufacturer's Warranties . 9

Appendix Layout diagrams of flight stairs . 10

Flight stairs, platforms and steel railings. Flight stairs, platforms and railings steel conditions Basic parameters and dimensions

1. Basic parameters and dimensions

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Methods of control

6. Marking, packaging, transportation and storage

Flight of stairs

Playgrounds

2. Technical requirements

Staircase railing

Site fencing

Types of steps of mid-flight stairs and platform decking

Type 1. Solid (F)

Type 2. Lattice

3. Completeness

4. Acceptance rules

5. Methods of control

6. Marking, packaging, transportation and storage

7. Installation instructions

8. Manufacturer's Warranties

Application (reference). Layout diagrams of flight stairs

Standards GOST 23120 78

Standards GOST R 53254-2009

Standards GOST 26887-86

Requirements for fences in accordance with GOST 25772 83

Flight of stairs

Playgrounds

2. Technical requirements

Staircase railing

Site fencing

Types of steps of mid-flight stairs and platform decking

Type 1. Solid (F)

Type 2. Lattice

3. Completeness

4. Acceptance rules

5. Methods of control

6. Marking, packaging, transportation and storage

7. Installation instructions

8. Manufacturer's Warranties

Application (reference). Layout diagrams of flight stairs

1. Basic parameters and dimensions

L

2. Technical requirements

3. Completeness

4. Acceptance rules

5. Methods of control

6. Marking, packaging, transportation and storage

7. Installation instructions

8. Manufacturer's Warranties

AppendixReference

Layout diagrams of flight stairs

Appendix
Reference