GB 24911-2010 English PDF

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GB 24911-2010: Bowl-coupler type steel tube scaffolding member
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 24911-2010	259	Add to Cart	3 days	Bowl-coupler type steel tube scaffolding member	Valid

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Basic data

Standard ID: GB 24911-2010 (GB24911-2010)
Description (Translated English): Bowl-coupler type steel tube scaffolding member
Sector / Industry: National Standard
Classification of Chinese Standard: P97
Classification of International Standard: 91.220
Word Count Estimation: 11,175
Date of Issue: 2010-08-09
Date of Implementation: 2011-06-01
Quoted Standard: GB/T 700; GB/T 2828.1; GB/T 3091; GB/T 5117; GB/T 5796.2; GB/T 5796.3; GB/T 5796.4; GB/T 6414; GB/T 9440; GB/T 11352; GB 50205
Regulation (derived from): Announcement of Newly Approved National Standards No. 3, 2010 (No. 158 overall)
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 applies to construction projects cuplock steel scaffolding, templates, support frame such as the use of steel scaffolding components cuplock production and testing. Also applies to municipal, water, chemicals, coal and shipbuilding and other projects using cuplock steel scaffolding components. Wheel button, painted disc, card type, and so steel scaffolding member may refer to this standard.

GB 24911-2010: Bowl-coupler type steel tube scaffolding member

---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.
Bowl-coupler type steel tube scaffolding member ICS 91.220 P97 National Standards of People's Republic of China Bowl button steel scaffold member Issued on. 2010-08-09 2011-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

5.2,5.4.3,5.6 technical content of this standard is mandatory, the remaining provisions are recommended. The standard proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China. This standard is under the jurisdiction of the Ministry of Housing and Urban Construction Engineering standard technical focal point. This standard is drafted by. China Academy of Building Research. Participated in the drafting of this standard. Datong Coal Mine Group, Hing Win Steel Plant, State Construction Engineering Quality Supervision and Inspection Center, China Construction Metal Structure Association Building fasteners Committee, Langfang Construction Machinery Co., Ltd. Kaibo. The main drafters of this standard. Wang Feng, Zhang Shulin, inexpensive into the lake, Sun Yi Ling, Guo Yu increase, Wei East. Bowl button steel scaffold member

1 Scope

This standard specifies the terms and definitions bowl button steel scaffold member, classification, requirements, test methods, inspection rules, marking, packaging, Transport and storage. This standard applies to the construction of production bowl button steel scaffold member Cuplock steel scaffolding, templates and other supporting frames used And testing. Also used in municipal, water, chemicals, coal and ships used in the project Cuplock steel scaffolding member. Round button, the disc Type, and other plug-in steel scaffolding member can refer to these standards.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 700 carbon structural steel GB/T 2828.1 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch inspection sampling plan GB/T 3091 low pressure liquid delivery welded steel pipe GB/T 5117 carbon steel electrode GB/T 5796.2 trapezoidal thread - Part 2. The diameter of the thread series GB/T 5796.3 trapezoidal threads - Part 3. Basic dimensions GB/T 5796.4 trapezoidal thread - Part 4. Tolerances GB/T 6414 casting dimensional tolerances and machining allowances GB/T 9440 Malleable Iron Castings GB/T 11352 Carbon steel castings for general engineering purposes Steel Engineering Construction Quality Acceptance GB 50205

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 On Bowl belshapecap Pole along the slide from the locking action Bowl node parts. 3.2 Under Bowl bowlshapesocket Bowl-shaped parts are welded to the pole on the node. 3.3 Pole standingtube Scaffolding vertical bearing rod. 3.4 Crossbar flattubecross Scaffolding horizontal rod bearing. 3.5 Jack crowntube When using the interpolated sleeve, the top pole no connection sleeve. 3.6 Diagonal rod slantingsupport Ends with diagonal bars rotary joint. 3.7 Bearing supports A fixed base, adjustable base and fixed support bracket, adjustable bracket support collectively. 3.8 Adjustable base jacksupport Plugged up in the lower end of the pole, the upper load distributing passed to the foundation, and can adjust the height of the component. 3.9 Adjustable bracket support u-jack Inserted in the upper end of the pole, following the upper load, and adjust the height of the component. 3.10 Bowl node cuplokjoint Solid-type socket cover by the upper node Bowl, Bowl under, limit pin and rail joints and the like. 3.11 From the pole, jack, bar, tilt rods, bearings, composed of member nodes, etc. Bowl. Category 4 4.1 member type and member names, see Figure 1. Schematic diagram of the type 1 member 4.2 Main parameters and series Member of the main parameters for the length of the member. Series main parameters are shown in Table 1. Table 1 Main parameters of series millimeters Type the name of the main parameters of the code series Pole LG 1200,1800,2400,3000 Table 1 (continued) millimeters Type the name of the main parameters of the code series Jack DG 900,1200,1500,1800,2400,3000 Crossbar HG 300,600,900,1200,1500,1800,2400 Diagonal rod XG 1697,2160,2343,2546,3000 Adjustable base KTZ 450,600,750 Adjustable bracket support KTC 450,600,750 4.3 Code Group Code. WKJ --- cuplock steel scaffolding. Type code. SWK --- the Bowl; XWK --- Under Bowl; LG --- pole; DG --- ram; HG --- crossbar; XG --- Diagonal rod; KTZ --- adjustable stand; KTC --- adjustable bracket support. Main parameters Code. A member expressed nominal length 1/10. Update code variants. either uppercase phonetic alphabet. 4.4 Model Group Code. WKJ □ - Type code. LG --- pole; DG --- ram; HG --- crossbar; XG --- oblique rod; KTZ --- adjustable base; KTC --- adjustable support bracket Main parameters Code. nominal length with member representation 1/10 Update code variants. phonetic alphabet is represented by uppercase 4.5 tag example. a) nominal length of 3000mm, the first variant of the updated Cuplock steel scaffolding pole. b) The nominal length of 300mm, the second variant updated Cuplock steel scaffolding crossbar.

5 Requirements

5.1 product design and structural calculations should be consistent with national safety specifications. Product according to prescribed procedures approved by the drawings and technical documents manufacture. 5.2 Material 5.2.1 raw materials qualified certificate and quality assurance, and product design in line with regulations. 5.2.2 The mechanical properties of steel shall comply with GB/T 3091 in the Q235. 5.2.3 Bowl material when using carbon steel or cast iron, its mechanical properties shall conform to GB/T 11352 in ZG270-500 Grades and GB/T 9440 in KTH350-10 grade requirements. 5.2.4 Under the bowl - use carbon steel manufacturing, its mechanical properties should be consistent with the provisions of GB/T 11352 in ZG270-500 grades using When steel stamping, the material shall comply with GB/T 700 in Q235, the plate thickness not less than 6mm, and dried (600 ~ 650) ℃ Aging treatment. Waste should not be used rusting steel restructuring. 5.2.5 rail joints, tilt-rod joints should be used carbon steel, its mechanical properties should be consistent with GB/T 11352 in ZG270-500 grades Provisions. 5.2.6 material bearing screw material shall comply with GB/T 700 in Q235, the adjusting nut casting should not lower the mechanical properties In GB/T 9440 stipulated KTH330-08 grades of malleable iron or GB/T 11352 stipulated ZG230-450 grades Cast steel. 5.3 Technology 5.3.1 pipe shall be free of cracks, dents, rust, should take a long pole use. Other lever take a long time to use, each arm only be permitted a Joints, cross-section should not be used to take a long, rail joints should be disposed within the first 1/4 of the length from the end, and shall be provided with length not less than 100mm, wall thickness Not less than 2.5mm liner. 5.3.2 Casting should not have cracks, porosity, shrinkage, trachoma and other casting defects, should be sticky sand, residual Riser, Phi seam burr, oxide and other clean In addition to clean. 5.3.3 stamping should not have cracks, burrs, scale and other defects. 5.3.4 should adopt the electrode Model GB/T in 5117 E4303. 5.3.5 welds should be smooth and should not be tainted welding, welding wear, slag, cracks and other defects. 5.3.6 welds shall comply with GB 50205 in three weld requirements. 5.4 Dimensions 5.4.1 member length tolerance is ± 1.5mm. 5.4.2 casting dimensional tolerances shall comply with GB/T 6414 in the CT7. 5.4.3 steel pipe nominal outside diameter of 48.3mm, a nominal wall thickness of 3.5mm, wall thickness tolerance should not be negative deviation, other dimensional tolerances should meet Together with the relevant provisions GB/T 3091's. 5.4.4 Pole Bowl node spacing should be 600mm modulus setting, spacing tolerance is ± 1.0mm. 5.4.5 Pole pole end surface perpendicular to the axis should verticality tolerance is 0.5mm. 5.4.6 rail joints and pole in contact with the arc of the axis should be perpendicular to the axis of the crossbar, verticality tolerance of 1.0mm. 5.4.7 Under the bowl - sized plane pole axis should be vertical, verticality tolerance of 1.0mm. 5.4.8 Bearing adjustment screw and nut threads shall comply with the provisions of GB/T 5796.2 ~ GB/T 5796.4 of. 5.4.9 adjustable base floor plate thickness not less than 6mm, adjustable support bracket "U" shaped steel sheet thickness of not less than 5mm. 5.4.10 extrapolation pole sleeve wall thickness not less than 3.5mm, the interpolated sleeve wall thickness not less than 3.0mm. Insert sleeve length should not be less than 160mm, welding end into a length of not less than 60mm, extended length of not less than 100mm. 5.5 appearance quality Member surface before applying anti-rust primer surface should be cleaned. Joints, bearings (including the adjustment nut) should be galvanized, other members should Spray anti-rust paint, the surface should be smooth, the coating should be uniform, there should heap paint, exposed iron and other defects. 5.6 The main strength member should meet the requirements of Table 2. Table 2 members Strength Index Project Requirements Bowl on strength when P = 30kN, the various parts should not be destroyed. Under Bowl weld strength when P = 60kN, the various parts should not be destroyed. Rail joint strength when P = 50kN, the various parts should not be destroyed. Rail joint welding strength when P = 25kN, the various parts should not be destroyed. Adjustable pedestal compressive strength when P = 100kN, the various parts should not be destroyed. Note. P for the test load.

6 Test methods

6.1 Test conditions 6.1.1 Accuracy testing machine should not be less than ± 1%, the use of legal units of measurement within certified by the expiration date. 6.1.2 the strength test loading speed should be controlled at 300N/s ~ 400N/s. 6.2 Test Project 6.2.1 appearance quality inspection Visually intuitive method test shall comply with the provisions of 5.5. 6.2.2 Measure Steel tape measure the length, measure the wall thickness with a caliper. 6.2.3 bowl buckle strength test 2, the test load P is 0kN added to 15kN, unloading completely, and then from 0kN added to 30kN, holding charge 2min. test Various parts of the pieces should not be destroyed. Figure 2 is a schematic Bowl strength test 6.2.4 Under Bowl weld strength test 3, the test load P is 0kN added to 30kN, unloading completely, and then from 0kN added to 60kN, holding charge 2min. test Various parts of the pieces should not be destroyed. Figure 3 under the welding strength test schematic Bowl 6.2.5 crossbar joint strength test 4, the test load P loading from the 0kN to 25kN, unloading completely, then add the 0kN to 50kN, holding charge 2min. Various parts of the specimen should not be destroyed. Millimeters

4 a schematic diagram of the crossbar joint strength test

6.2.6 rail joint welding strength test 5, the test load P is 0kN added to 10kN, unloading completely, and then from 0kN added to 25kN, holding charge 2min. test Various parts of the pieces should not be destroyed. Millimeters

5 rail joint welding strength test schematic

6.2.7 adjustable pedestal compressive strength test As shown in Figure 6, P from the 0kN added to 50kN, unloading completely, then add the 0kN to 100kN, holding charge 2min. Various parts of the specimen It should not be damaged.

6 adjustable pedestal schematic compressive strength test

7 Inspection rules

7.1 Inspection classification Inspection cuplock steel scaffolding member sub-type test and factory inspection. 7.2 factory inspection 7.2.1 Products manufactured by the manufacturer according to the factory quality inspection department inspection items (see Table 3), piece by piece inspection and the issuance of qualified products Before the factory certificate. 7.2.2 factory inspection items shall conform to Table 3. Table 3 factory inspection items No. Test item test based on test method 1 weld quality visual, measuring 5.3.5,5.3.6 2 component size measuring 5.4 3 visual appearance quality 5.5 7.3 Type inspection 7.3.1 Where the following circumstances, type of inspection should be carried out. a) new products or old products to the plant production trial setting acceptance time; B) after the official production, such as structure, materials, processes greatly changed; c) continuous production for three months; D) After the product long-term shutdown, resume production; e) the national quality supervision agency requirements for type testing. 7.3.2 Type inspection items shall conform to Table 4. Table 4 type test items No. Test items Test method to determine the basis 1 bowl buckle strength 6.2.3 5.6 2 Bowl weld strength under 6.2.4 5.6 3 rail joint strength 6.2.5 5.6 4 rail joint welding strength 6.2.6 5.6 5 5.6 6.2.7 compressive strength adjustable pedestal 6 5.5 Appearance Quality 6.2.2 7 Measure Measuring Tool 5.4 7.4 Sampling Method 7.4.1 Type inspection by sampling twice normal inspection program GB/T 2828.1 conduct specified in Table 5. Table 5 secondary normal inspection sampling plan Test items special item category Test level AQL range sample batch sample size Ac Re main project On the strength Bowl Under Bowl weld strength Rail joint strength Rail joint welding strength Adjustable seat compressive strength S-4 4 281 to 500 the first second 501 to 1200 the first second 1201 to 10000 the first second General project Appearance Quality size S-4 10 281 to 500 the first second 501 to 1200 the first second 1201 to 10000 the first second NOTE. AQL --- acceptance quality limit; Ac --- receiving data; Re --- rejection number. 7.4.2 Sample test should be used in a random sample inspection of the factory batch. Batch acceptance range 7.4.3 Each batch of products should be more than 280. When quantities greater than 10,000, the excess shall be sampled separately in Table 5. 7.5 determination method 7.5.1 single product shall comply with the relevant provisions of Chapter 5. 7.5.2 Bulk product judged according to Table 5. 7.5.3 Strength Index, appearance quality, size are qualified, it should be called qualified. 7.6 Upon examination non-acceptance of the product, allows manufacturers to rework, and then submit acceptance. 8 signs, packaging, transportation and storage 8.1 mark Product logo provided on the factory certification, should be marked. a) the product name; b) the trademark; c) specifications, quantity; d) the manufacturer's name and address; e) inspectors mark; f) the date of manufacture. 8.2 Packaging Product according to specifications, sorted and bundled firm, the number of each bundle should be suitable for shipping. 8.3 Transportation and storage Products in the transportation, storage, should be taken to moisture, anti-corrosion measures. ......

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