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GB 21976.3-2012 English PDF

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GB 21976.3-2012: Escape apparatus for building fire -- Part 3: Escape ladder
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Basic data

Standard ID GB 21976.3-2012 (GB21976.3-2012)
Description (Translated English) Escape apparatus for building fire -- Part 3: Escape ladder
Sector / Industry National Standard
Classification of Chinese Standard C85
Classification of International Standard 13.220.10
Word Count Estimation 10,128
Quoted Standard GB/T 191; GB/T 9969; GB/T 10125
Regulation (derived from) National Standards Bulletin 2012 No. 28 " building fire escape evacuation equipment " series of national standards released
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard relates to escape ladder terminology and definitions, classifications and models, technical requirements, test methods, inspection rules and signs, packaging, transport and storage. This standard applies to building a fire occurs, fo

GB 21976.3-2012: Escape apparatus for building fire -- Part 3: Escape ladder

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Escape apparatus for building fire.Part 3. Escape ladder ICS 13.220.10 C85 National Standards of People's Republic of China Building fire escape equipment Part 3. Escape ladder 2012-11-05 release 2013-06-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

Chapter 5, Chapter 7 and 8.1 of this section are mandatory and the rest are recommended. GB 21976 "Building fire escape equipment" is divided into the following sections. - Part 1. with guidance; - Part 2. escape retarder; - Part 3. Escape ladder; - Part 4. escape chute; - Part 5. Emergency escape; - Part 6. escape rope; - Part 7. Filter - type fire - fighting self - help respirator; - Part 8. Chemical oxygen fire self - help respirator; This part is part 3 of GB 21976. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part is made by the Ministry of Public Security of the People's Republic of China. This part is owned by the National Fire Safety Standardization Technical Committee Fire Services Accessories Subcommittee (SAC/TC113/SC5). This part of the drafting unit. Ministry of Public Security Shanghai Fire Research Institute. This part of the main drafters. Li Baozhong, Wan Ming, Jin 韡, Jiang Xudong, Han Xiang, Gu Wenjie, Li Jinghai. This part is the first release. Building fire escape equipment Part 3. Escape ladder

1 Scope

This part of GB 21976 specifies the terms and definitions of escape ladder, classification and type, technical requirements, test methods, inspection rules and Logo, packaging, transportation and storage. This part applies to the construction of fire when the trapped personnel to escape the use of special fixed escape ladder and hanging escape ladder.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 191 packaging and storage icon General rules for the use of industrial products GB/T 9969 GB/T 10125 artificial atmosphere corrosion test salt spray test

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Fixed escape stairs fixureescapeladder The use of fixed frame and transmission chain pedal structure, construction fires rely on the user's own weight so that the pedal vertical drop escape ladder. 3.2 Suspension escape ladder pensileescapeladder The use of the top of the suspension and the edge of the staircase file structure, the construction of fire for the user to climb the climbing ladder. 3.3 Pedal tread Fixed escape ladder for the user foot of the cross members. 3.4 Transmission chain transmissionchain Fixed escape ladder on both sides of the link to connect the components of the pedal. 3.5 Stapler stirrup Suspension escape ladder for the user foot of the cross members. 3.6 Side sider Suspension escape ladder on both sides of the link to connect the steps of the file. 3.7 Brace And a support member for keeping the suspension escape ladder at a distance from the wall. 3.8 Ladder width Escape ladder drive chain (or edge cable) between the inner margin. 3.9 Maximum working height maximumworkingheight The fixed escape ladder is the vertical distance from the pedal to the ground at the highest position available for escape personnel. Suspended escape ladder for the top of the hook The vertical distance from the end of the staircase.

4 classification and model

4.1 Classification Escape ladder according to the structure is divided into fixed escape ladder (hereinafter referred to as fixed ladder) and hanging escape ladder (hereinafter referred to as hanging ladder). 4.2 Model Escape ladder model by the large class, small class, the main parameters, the structure of the form code, edge cable material code composition, the form is as follows. Escape refuge equipment Escape stairs - □ Maximum working height in meters (m) Structural code. D-fixed, G-hanging type Edge cable material code. S-wire, L-steel chain, Z-fiber fabric (ribbon or rope), fixed ladder omitted Example. TT-40D. steel fixture with a maximum working height of 40m; TT-15GL. indicates a maximum working height of 15m, Chain hanging escape ladder.

5 technical requirements

5.1 Structure and appearance requirements 5.1.1 Escape ladder metal parts should be anti-corrosion treatment, no rust, spots, burrs and other defects. 5.1.2 Escape ladder stalls or pedal of the foot surface should be anti-skid treatment. 5.1.3 Escape ladder of the transmission chain or edge cable should be the same structure, uniform thickness, no distortion and wear phenomenon. 5.1.4 fixed ladder should be set on both sides of the fence, pedal should be set above the handrail. 5.1.5 The drive system of the fixed ladder shall be flexible and the protective measures shall be carried out outside the transmission parts. 5.1.6 fixed ladder coating should be smooth, uniform color. 5.1.7 Suspension ladder The outer surface of the rope used shall be free of wear. 5.1.8 Hanging ladder The steel chain used in each ring should be flexible, the chain shape should be consistent, the chain should be straight, without sharp corners or sharp edges. 5.1.9 Hanging ladder used in the ribbon should be locked edge, the end should be crease and no remaining silk; rope rope should not leave the silk, the end of the knitting before the Liao hot treatment, edible flowers shall not be roasted after treatment, part of the flower should be added protective cover. 5.2 fixed ladder 5.2.1 The basic parameters of the fixed ladder shall comply with the provisions of Table 1. Table 1 Basic parameters of technical indicators Ladder width/mm ≥500 Pedal spacing/mm 3000 ± 50 Pedal width/mm ≥200 The maximum number of people/the number of the whole ladder pedal divided by 2 after the integer value The minimum load of the whole ladder/N 343 ± 5 Single pedal maximum load/N 981 ± 5 Maximum load of the whole ladder/N (981 ± 5) × Maximum carrying capacity 5.2.2 The pedal of the fixed ladder shall be capable of withstanding the load of 3 times the maximum load of the single pedal. After the strength test, the pedal shall not be broken or Obvious deformation phenomenon. 5.2.3 The pedal and drive chain of the fixed ladder shall be capable of withstanding the shear load of 3 times the maximum load of the single pedal, and the shear of the drive chain After the test, the pedal, the drive chain and the connection between the two should not be broken or obvious deformation. 5.2.4 fixed ladder of the handrail should be able to withstand 1.5 times the maximum load of single pedal load, after the strength test, the maximum bending deformation of the handrail Should not be greater than 2mm. 5.2.5 The main shaft of the fixed ladder shall be capable of withstanding the load of 3 times the sum of the maximum load of the whole ladder and the total weight of the operating parts. After the strength test, Should not appear broken or obvious deformation phenomenon. 5.2.6 The drive chain of the fixed ladder shall be capable of withstanding the load of 3 times the sum of the maximum load of the whole ladder and the total weight of the operating parts. After the strength test The kinetic chain should not be broken or deformed. 5.2.7 fixed ladder of the transmission chain after corrosion resistance test, there should be no layer, peeling or visible pitting pits. And then the intensity Test, the transmission chain should not be broken or obvious deformation. 5.2.8 The speed of the pedal of the fixed ladder at the maximum load of the whole ladder, the maximum load of the single pedal and the maximum load of the whole ladder shall be 0.1 m/s to 0.4 m/s. 5.2.9 fixed ladder should be set emergency braking mechanism. When the descending speed of the pedal is greater than 0.5m/s, the emergency braking mechanism should be automatically stopped Fixed ladder operation, and can be manually operated by the load pedal slowly and safely down to the ground. 5.2.10 fixed ladder after the reliability test, should not appear to jam or affect the normal operation of the fault, the pedal of the descending speed should still meet 5.2.8. 5.3 hanging ladder 5.3.1 The basic parameters of the suspension ladder shall comply with the provisions of Table 2. Table 2 Basic parameters of technical indicators Ladder width/mm ≥300 Distance between stalls/mm 300 ± 5 Staircase cross section size/mm diameter of not less than 20 of the tube or side length of not less than 20 square tube Foot length/mm ≥100 Maximum number of carriers/maximum working height divided by the integer value after 1.5 Single stall maximum load/N 981 ± 5 Maximum load of the whole ladder/N (981 ± 5) × Maximum carrying capacity 5.3.2 The upper end of the suspension should be securely secured to the building. When the body is flexible and reliable, should not appear winding, knotting or jamming Phenomenon, feet should be able to fully open and support the wall. 5.3.3 The staircase of the staircase shall be capable of withstanding the load of 3 times the maximum load of the single step, and after the strength test, the staircase shall not be broken or Obvious deformation phenomenon. 5.3.4 The staircase and edge of the staircase should be able to withstand the shear load of 3 times the maximum load of the single step, and the shear test After the staircase, edge cable and the connection between the two should not be broken or obvious deformation. 5.3.5 Suspended ladder should be able to withstand 3 times the load of the maximum load of the whole ladder, after the overall strength test, the hook shall not fall off or obvious slippery Move, all parts should not be broken or obvious deformation. 5.3.6 Suspension ladles After corrosion resistance test, the metal parts shall be free from the layers, peeling or visible pitting pits. And then proceed to the whole Body strength test, the hook shall not fall off or obvious slip, all parts should not be broken or obvious deformation. 5.3.7 Connection of the staircase and the edge cable The use of friction to fasten (for example, the use of the top of the bolt and the appearance of the friction of the rope) Should be staircase and edge cable connection reliability test. After the test, the staircase and the edge of the connection should not be loose and slip phenomenon, and meet 5.3.4 Requirements.

6 test method

6.1 Structure and appearance inspection Check with visual inspection. 6.2 fixed ladder test 6.2.1 Basic parameter measurement Measure with a universal gage. 6.2.2 Pedal strength test The fixed ladder is in a locked state. Optional two pedals, in the test pedal were applied to the single pedal maximum load 3 times the load, the load Should be perpendicular to the ground and evenly distributed in the middle of the staircase 100mm width of the area, for 2min after unloading. Observe and record the test result. 6.2.3 Cut test of the drive chain The fixed ladder is in a locked state. Optional two pedals, in the test pedal were applied to the single pedal maximum load 3 times the load, the load Should be perpendicular to the ground and evenly distributed in the drive chain within 100mm range of the pedal, after 2min after unloading. Observe and record test results. 6.2.4 Handrail strength test In the middle of the fixed handrail 100mm width of the area evenly applied single pedal maximum load 1.5 times the load for 2min After unloading. Observe and record the test results. 6.2.5 Spindle strength test Will be fixed ladder spindle removed, or extract the same batch has not yet installed the spindle, the spindle at both ends, the spindle and the middle of the Rally, , The tensile speed of the Rally machine is set at 100mm/min, and then the sum of the maximum load and the total weight of the running parts is applied to the spindle Of the load, the load should be perpendicular to the spindle and evenly distributed in the middle of the spindle width of 100mm area, after 2min after unloading. Observed And record the test results. 6.2.6 Transmission chain strength test Take the length of not less than 10 sections of a transmission chain, the drive chain at both ends and the Rally, respectively, the next fixture connected, the tensile rate of tension Set at 100mm/min, and then the drive chain to impose the maximum load and the total weight of the running part of the load and 3 times the load, after 2min Uninstall. Observe and record the test results. 6.2.7 Corrosion resistance test of transmission chain A length of not less than 10 sections of a transmission chain placed in the salt spray test chamber, the box temperature maintained at 35 ℃ ± 2 ℃, the concentration of 5% of the sodium chloride aqueous solution to spray the pressure of 0.07MPa ~ 0.17MPa continuous spray 8h after the spray and stop the heating controller, Let the natural cooling 16h, to 24h for a cycle, a total of five cycles test. Then rinse the salt with water to allow it to dry naturally 24h Observe and record the test results. And then press 6.2.6 to test 6.2.8 Pedal descending speed test The minimum load of the whole ladder, the maximum load of the single pedal and the whole ladder are specified for the fixed ladder with the fixed ladder special test device The maximum load, the two times the speed test. Record the descending distance and time, and calculate the descent speed. 6.2.9 Emergency braking mechanism test With the fixed ladder special test device to make the fixed ladder descending speed greater than 0.5m/s, observe the emergency braking mechanism of the action. Then enter Line manual operation, observe the descent of the pedal. Record the test results. 6.2.10 Operational reliability test The maximum load of the whole ladder specified in Table 1 was applied to the fixed ladder by means of a special test device for fixed ladder, which was circulated for 100 times. Observe and record the test results. And then press 6.2.8 to test. 6.3 Suspension test 6.3.1 Basic parameter measurement Measure with a universal gage. 6.3.2 Expand performance test The top of the suspension ladder fixed at no less than the maximum working height of the building, and then free to start the body. Continuous twice. Observe and record the test results. 6.3.3 Stair strength test The deployment of the hanging ladder according to the use of vertical hanging, optional two staircase file, in the test staircase were applied to the single step stall maximum load 3 times the load, the load should be vertical ground and evenly distributed in the middle of the staircase 100mm width of the area, after 2min unloading. View Check the test results. 6.3.4 Test of Shear Strength of Side Straps The deployment of the hanging ladder hanging according to the use of the state, optionally two staircase file, in the test staircase on the single staircase to apply the maximum load of 3 times Load, the load should be vertical ground and evenly distributed in the edge of the edge of 100mm within the staircase, for 2min after unloading. Observe and Record the test results. 6.3.5 Overall strength test The deployment of the hanging ladder according to the use of the state of vertical hanging on both sides of the cable at the bottom of the uniform application of the total table for the provisions of the two ladder maximum load 3 times the load, after 2min unloading. Observe and record the test results. 6.3.6 Corrosion resistance test The hanging ladder placed in the salt spray test chamber, in accordance with the requirements of GB/T 10125, the box temperature maintained at 35 ℃ ± 2 ℃, the concentration 5% sodium chloride aqueous solution is sprayed continuously at a spray pressure of 0.07 MPa to 0.17 MPa for 8 h to stop the spray and turn off the heating control Device, let the natural cooling 16h, to 24h for a cycle, a total of five cycles test. Then rinse the salt with water to allow it to dry naturally 24h Observe and record the test results. And then press 6.3.5 to test. 6.3.7 Connection reliability test The expansion of the hanging ladder according to the use of vertical hanging, the optional two staircase stalls, respectively, to apply a single step stall maximum load of 1.5 times the load, The load should be vertical ground and evenly distributed in the middle of the staircase 100mm width of the area, keep 1min after unloading, and then stay 1min A loop. Recurve 50 cycles after the stall and edge cable to check. Observe and record the test results. And then press 6.3.4 to test.

7 inspection rules

7.1 Type inspection 7.1.1 Inspection of product type The inspection of all items shall be carried out in accordance with the requirements of this part. 7.1.2 A type test shall be carried out in any of the following cases. a) new product identification; b) after the formal production, product structure, materials, production process has a greater change; c) product discontinued for more than one year, to resume production; d) continuous production at least three years; e) the requirements of the State Quality Supervision Agency for carrying out the type inspection. 7.2 Factory inspection 7.2.1 The product shall be inspected by the quality inspection department of the production plant and accompanied by a certificate. 7.2.2 Fixed ladder The factory inspection items are 5.1.1 to 5.1.6, 5.2.1, 5.2.8 and 5.2.9 of this part. Suspension ladder factory inspection items For the purposes of this section, 5.1.1 to 5.1.3, 5.1.7 to 5.1.9, 5.3.1 and 5.3.2. 7.3 Sampling 7.3.1 The factory inspection of the product shall be all inspection. 7.3.2 Number of samples for type inspection. 1 for the fixed ladder and 2 for the suspension ladder, and randomly selected from the qualified products. 7.4 Rules of judgment 7.4.1 Type inspection Type inspection items of the test results all meet the requirements of this part, sentenced to qualified. 7.4.2 Factory inspection If the inspection result of the factory inspection project meets all the requirements of this part, it shall be qualified. In the event of failure, the product must be reworked To re-submit the inspection. 8 signs, packaging, transportation, storage 8.1 mark 8.1.1 A permanent nameplate shall be provided in the obvious position of each escape ladder. 8.1.2 The nameplate of the product shall indicate. a) product name, model; b) the implementation of standard code; c) maximum working height; d) the maximum number of persons; e) the total weight of the equipment operating parts; f) name of the manufacturer, trademark; g) production date or factory number; h) Safety warning (including "single pedal (or escalator) limited to 1"). 8.1.3 The box shall be printed with. a) product name, model; b) name of the manufacturer, trademark, site; c) date of manufacture or factory number; d) the number of products; e) Packing box dimensions. length × width × height (in cm); f) marked "to prevent oil pollution" and "moisture" and other signs, signs should be consistent with the provisions of GB/T 191. 8.2 Packaging 8.2.1 The product should be packed in plastic bags for packaging. To prevent friction between components, apply foam or cardboard insulation, topical wood Box or carton packaging. 8.2.2 The box should be accompanied by a document. a) product certification; b) product brochures; c) packing list. 8.2.3 The contents of the product specification should comply with the provisions of GB/T 9969, and the product installation, use, safety precautions, maintenance As well as the life cycle and so on. 8.3 Transport Products in the loading and unloading and transportation can not be dumped, should avoid contact with corrosive substances and by oil, water pollution. 8.4 Storage Products should be stored in the indoor dry and ventilated place, to avoid direct sunlight, prohibited with grease, acid and corrosive items mixed.

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