Some standard content:
ICS 29.120
Classification number: K13
Registration number: 12505-2003
Light industry standard of the People's Republic of China
QB/T1453-2003
Replaces QB/T 1453-1992
Cable tray
Cable supports system
Published on September 13, 2003
Implementation by the National Development and Reform Commission of the People's Republic of China on October 1, 2003
This standard is a revision of QB/T1453-1992 Cable tray. Compared with QB/T1453-1992, this standard has the following technical differences: Addition and expansion of the definition of cable tray. - Added the technical content of fire-resistant cable trays, - Added the technical content of "zinc-nickel plated cable trays". - Improved the test methods.
QB/T1453-2003
Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, and Appendix F of this standard are normative appendices, and Appendix G is an informative appendix. This standard is proposed by the China Light Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Light Industry Machinery. The drafting unit of this standard: Tengzhou Hengda Youbei Co., Ltd. Cable Tray Factory of Shandong Province. The main drafters of this standard: Zhang Xian, Zhang Aiguo, Miao Wenying. This standard was first issued in 1992, and this is the first revision. Since its implementation, this standard has replaced the light industry standard QB/T1453-1992 Cable Tray issued by the former Ministry of Light Industry;
Cable Tray||t t||QB/T1453-2003
This standard specifies the models, requirements, test methods, inspection rules and marking, packaging, transportation and storage of steel cable tray products. This standard applies to steel cable trays for erecting power cables and control cables below 10kV, and is not applicable to cable trays made of metal and non-metal.
2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding dated content) or revisions are not applicable to this standard. However, the parties reaching or agreeing on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. Packaging, storage and transportation labeling
GB/T 191
GB/T 700—1988
Carbon structural steel
GB/T 715-1989
GB/T 716-1983
GB/T 912- 1989
Carbon cable steel for standard partsHot-rolled round steel
Ordinary carbon cable structural steelCold rail steel strip
Hot-rolled thin steel plates and strips of carbon cable structural steel and low alloy structural steelGH/T1720—1979Determination of adhesion of paint filmGB/T 1731
GB/T 1732
GB/T 1764
Determination of flexibility of paint film
Determination of impact resistance of paint film
Determination of thickness of paint film
GB/T I804—1992
General tolerance Unspecified tolerance of linear scale
GB/T2423.4 Basic environmental test procedures for electric and electronic products Test Db: Alternating condensation test method GB/T2423.17 Basic environmental test procedures for electric and electronic products Test Ka: Salt spray test method GB/T2423.33 Basic environmental test procedures for electric and electronic products Test Kca: High concentration sulfur dioxide test method GB/T4955 Metal covering Measurement of the thickness of the coating layer Anodic dissolution coulometric method GB/T4956 Measurement of the thickness of non-magnetic coatings on magnetic metal substrates Magnetic method GB/T5117-1995 Carbon steel welding rods
GB/T5270-1985 Test method for adhesion strength of metal coatings (electrodeposited layers and chemically deposited layers) on metal substrates GB/T9978-1988 Test method for fire resistance of building components GB50205-2001 Steel structure. Engineering quality acceptance standard CECS 24:1990 Technical specification for application of fire retardant coatings for steel structures 3 Definitions, models and specifications
3.1 Definitions
The following definitions apply to this standard.
A general term for a rigid structural system with reverse continuity made of steel materials, consisting of trays, straight sections of ladder channels, driveways, accessories, supports and hangers, etc., used to support cables.
QB/T1453-2003
A trapezoidal component consisting of two longitudinal sides and several cross bars. 3.1.3
Plated tray
A trough-shaped component consisting of a bottom plate with holes and sides, or a component formed by punching a whole steel plate. 3.1.4
Plated tray
A trough-shaped component consisting of a bottom plate and sides, or a trough-shaped component formed by bending a piece of steel plate. 3.1.5
Assembled tray
A component formed by connecting a tray with holes that can be combined at the construction site by bolts or plug-ins. 3.1.6
Refers to a rigid straight component that cannot change direction or size and is used to directly support cables: 3.1.7
Refers to a rigid non-linear component that can change direction or size and is used to directly support cables. 3. 1. 8
Horizontal bend
Components that change the direction of the bridge frame on the same horizontal plane. 3. 3. 9
Horizontal tee
Components that connect pallets and ladders in three directions separated by 90° on the same horizontal plane, divided into two types: equal width and variable width. 3. t. 10
Horizontal cross
Components that connect pallets and ladders in four directions separated by 90° on the same horizontal plane, divided into two types: equal width and variable width. 3. 1. 11
Upper bend
Components that change the direction of pallets and ladders from the water surface to the upper side. 3.1.12
Downward bend
Parts that change the direction of pallets and ladders from the horizontal plane to the downward direction. 3.1.13
Vertical tee
Parts that connect pallets and ladders in three spaces separated by 90° on the same vertical plane. They are divided into two types: equal width and variable width. 3.1.14
Vertical cross
Parts that connect pallets and ladders in four spaces separated by 90° on the same vertical plane. They are divided into two types: equal width and variable width. 3.1.15
Reducing straight-through
Parts that connect pallets and ladders of different widths or heights on the same plane. 2
QB/T 1453—2003
Refers to the connection between the straight section and the bend used for the straight hub, to form a continuous rigid straightening system, which is necessary for connecting and fixing or supplementing the straight section and bend function. Divided into: straight connecting plate;
hinged connecting plate, divided into horizontal and vertical: continuous hinged plate;
variable width connecting plate;
variable height connecting plate:
telescopic connecting plate;
turning connecting plate:
upper and lower connecting plates:
cover plate:
partition plate;
pressure plate:
terminal plate:
m) down lead:
n) vertical shaft:
fasteners:
support, silk frame
refers to the components that directly support pallets and ladder channels. Divided into: a) Support arm: a rigid component that directly supports the pallet and ladder frame and is fixed at one end, divided into snap-on type and bolt-fixed type; b) Column: a component that directly supports the support arm, divided into: 1-shaped steel, channel steel, angle steel, and ascending steel column: Product frame: a rigid component that suspends the pallet and ladder frame, divided into: steel single and double rod type: angle steel single and double rod type: lower-shaped steel single and double rod type: channel steel single and double rod type: special-shaped steel single and double rod type: d) Other fixed brackets: such as vertical, inclined and other fixed brackets. 3.2 Models and specifications
3.2, 1 Structural form: The bridge frame is divided into four types according to the structural type of the main structural parts: ladder type, tray type with holes, tray type without holes, and combined type. Its code should comply with the provisions of Table 1.
Table 1 Structural type
Protective layer
Plate type
Non-perforated tray type
Newton type
Protective layer category code should comply with the provisions of Table 2. Table 2
Painting or
Electrogalvanizing
Protective layer category code
After electrogalvanizing
Spraying powder
After hot wrinkling zinc
Brushing after painting
Fire retardant coating
After electrogalvanizing
Fire retardant coating
Electrogalvanizing
Nickel alloy
QB/T1453-2003
3.2.3 Model
Model indicates:
口×口
Specification code: height×width
Surface protection layer type code
Structural beauty code
Bridge code: DQJ
Among which the protection layer category code may not be indicated in the model, and can be unified in words. 3.2.4 Basic number
3.2.4.1 The length ratio of the bridge frame shall comply with the provisions of Table 3. 3 Bridge
The height and width series dimensions shall comply with the provisions of Table 4. Table 4
Note: The symbol "male" indicates commonly used specifications, 300
Height and width series
400500
The commonly used inner bending radius of the ladder frame bend is as follows! Tray,
Bending shape: the inner radius of the two inner right angle sides is 300mm, 600mm, 900mm: a)
Arm shape: 300mm600mm, 900mm
The ventilation hole area at the bottom of the perforated tray should not be greater than 40% of the total bottom area. 3.2.4.4
4Requirements
The center spacing of the straight section ladder frame crosspiece and the center spacing of the ladder frame bend crosspiece at 1/2 length are 200mm-300mm. 4.1 The materials used for steel cable trays shall meet the following requirements. 4.1.! Cable trays and ladder frames should be made of cold rolled plates. Under the condition of meeting the strength requirements, hot rolled plates can also be used. The material should comply with the provisions of GB/T700-1988, and Q235A steel should comply with the relevant provisions of GB/T71G-1983 and GB/T912-1989. 4.1.2 The minimum allowable plate thickness of pallets and ladder racks is shown in Table 5.4
Table 5 The minimum allowable plate thickness of pallets and ladder racks is 400~800
4.3 The surface anti-wear layer material shall comply with the provisions of the relevant national standards. QB/T1453-2003
Minimum allowable thickness
4.1.4 The welding rods for manual welding shall comply with the provisions of GB/T5117--1995, and it is advisable to use F4300~E4313 welding rods: 4.1.5 The bolt material for bridge frame shall comply with the provisions of GB/T 715-1989. 4.2 The bearing capacity of steel bridge frame shall meet the following requirements. 4.2.1 Load level: Under the condition of simply supported beam with a span of 2m, the rated uniformly distributed load of pallets and ladder racks is divided into four levels, see Table 6.
Table 6 Load level
Load level
Rated uniformly distributed load KN/a
4.2.2 The load-bearing capacity of pallets and ladder racks shall be verified according to the provisions of the load test in Appendix A. In the load test, the uniform load when the side begins to become unstable or the initial permanent deformation occurs is the failure load. The value of the failure load divided by the safety factor of 1.5 is the allowable uniformly distributed load, which shall not be less than the rated uniformly distributed load.
4.2.3 The manufacturer shall provide a curve or data table showing the relationship between different spans and allowable uniformly distributed loads for various types and specifications of pallets and ladder racks. 4.2.4 The deflection of pallets and ladder racks when bearing the rated uniform load shall not be less than 1/200. 4.2.5 The ratio of the maximum value of the hanger crossbar or the side support fixed to the bracket when bearing the rated load of the pallet and ladder rack to its length shall not be greater than 1/100.
4.2.6 Determination of uniformly distributed load: T. The uniformly distributed load should be less than the rated uniformly distributed load. 4.2.6.1 When it is confirmed that there is no need to consider additional concentrated loads during installation or maintenance under the engineering conditions, the working uniformly distributed load shall be calculated based on the uniform distribution of the cable weight. 4.2.6.2 When there may be additional concentrated loads during installation or maintenance, the working uniformly distributed load shall be calculated based on the sum of the uniform distribution of the cable weight and the equivalent uniform distribution value of the additional concentrated load. The equivalent uniform distribution value of the additional concentrated load shall be converted according to formula (1). 9p
Equivalent uniform distribution of additional load, N/: P
-Additional concentrated load, and calculated as 900N
Span between supports, m2=
4.2.7 The tensile and yield mechanical properties of the bridge weld shall not be lower than the mechanical properties of the main body material. The weld surface shall be uniform and shall not have defects such as leakage, cracks, rust, burn-through, arc pits, etc., and shall meet the third-level requirements of GB50205-2001. 4.3 Surface treatment of bridge
4.3.1 The technical quality indicators of hot-dip galvanizing anti-corrosion treatment shall comply with the provisions of Table 7. 4.3.2 The technical quality indicators of electroplating galvanizing anti-corrosion treatment shall comply with the provisions of Table 8. 4.3.3 The batch quality indicators of zinc-nickel-gold anti-abrasion treatment shall comply with the provisions of Table 9: 4.3.4 The technical quality indicators of spray powder anti-corrosion treatment shall comply with the provisions of Table 10. 4.3.5 The technical quality standards of paint anti-corrosion treatment shall comply with the provisions of Table 1!. 5
QB/T1453-2003
4.3.6 For bridges with composite anti-corrosion treatment after galvanizing and then spraying with powder or painting, the thickness, adhesion and appearance of the galvanized layer shall comply with the technical quality indicators of Table 7 and Table 9; the technical quality indicators of spraying and painting shall comply with the technical quality indicators of Table 10 and Table 11 respectively. Table 7 Hot-dip galvanizing anti-corrosion technology quality
Galvanizing thickness (adhesion amount)
Average value
Zinc layer adhesion
Zinc layer uniformity
Coating thickness
(adhesion)
Surface passivation treatment
Zinc layer adhesion
Coating thickness
(adhesion amount)
Surface passivation treatment
Zinc layer adhesion
Thickness Am
Yin rock square grade
Impact weakness
Flexibility mm
Anti-angle edge
Analysis frame components
Bolts, and rods (diameter greater than 10mm)
265 μn (460 g/m2)
254μm (380g/m*)
The zinc layer should not peel off or bulge in the test of scribing, cross-cutting or hammering. The zinc layer should be even without defects such as hair sticking, overburning, ash hanging, balance marks, partial galvanizing (diameter above 2m), etc., and there should be no zinc plating that affects installation. The coating should be smooth and the bolts should be able to be screwed in. Table 8 Technical quality of electroplated zinc anti-corrosion
Bridge frame
≥M14
M8~M12
212μn (84g/m2)
212μm (84g/m2)
=9um (63g/m)
6μm (42g/m)
After galvanizing: There should be a good passivation film (self-contained, color, grass green, dark green) The zinc layer should not peel off in the line and grid test, but should be smooth, uniform and dense, without peeling, bubbles, flower beds, unplated parts, scratches and other defects Table 9 Technical quality of electroplated zinc-nickel alloy anti-corrosion
Bridge frame
2x8μm (56g/m*)
28 μm (5f g/m)
26μm（42g/m2）
a5μm (35g/ma)
After passivation treatment, there should be a good passivation film (white, color, black, dark green, grass green). The zinc layer should not peel off in the cross-cutting test. The surface of the zinc layer should be smooth, uniform and dense, without peeling, bubbles, spots, joints, cancer and other defects. Table 10 Spray powder anti-corrosion technology quality
Epoxy powder
Uniform light, no bubbles, no cracks, uniform color 4.4 Technical indicators of fire-resistant bridge
Technical quality of fire-resistant coating
Flat, smooth, even, no peeling, no bubbles, blisters 4.4.1 Fire resistance limit: The fire resistance limit of fire-resistant bridge is divided into three levels, see Table 12. Table 12 Fire resistance level
Fire resistance level
Fire avoidance limit
The technical quality indicators of fire-resistant polyester coating on the bridge surface shall comply with the provisions of Table 13. Table 13 Technical quality of coating
Anti-paste
Anti-cyst
Water-adaptability h
Frost resistance
Thickness mm
4.5 The size limit deviation of the bridge frame shall comply with the following provisions. Refers to
QB/T 1453-2003
Not less than the third level specified in GB/1:1720-1979 Flexure 1./100 The coating shall not be flaked or peeled off
Selection L/200 The coating shall not be layered or peeled off
Number of freeze-thaw cycles: 15
4.5.1 Length is JS16: Depth is JS18: Height is JS17. Limit deviation of screw hole diameter and hole pitch
The bolt hole diameter can be 1. larger than the nominal diameter of the screw.5mm (when the bolt diameter is not greater than M16) or 2mm (when the screw diameter is not less than "a)
M20), the bolt hole accuracy should not be lower than H14 level. b)
The maximum deviation of the bolt connection hole spacing is shown in Figure 1. E±1.0
Center
L, the distance between two adjacent holes in a group;
The distance between two holes in the same group
Bolt connection hole spacing
L, the distance between two adjacent end holes
QB/T1453-2003
4.5.3 The dimensional limit deviation of other components shall comply with the provisions of Class C in GB/1804-1992. 4.6 The surface of the bridge frame shall be flat and smooth, and there shall be no defects such as burrs and sharp edges that damage the cable insulation layer on the surface. 4.7 When the bridge system is used to form a grounding loop, the manufacturer shall indicate the minimum cross-sectional area of the tray and ladder in the longitudinal direction on the nameplate. The resistance value at the connection between the ends of the bridge shall not be greater than 0.00033.0. 5 Test method
5.1 The load test and the stretch test shall be carried out in accordance with the provisions of Appendix A. 5.2 The environmental test of the anti-corrosion layer shall be carried out in accordance with the provisions of Table 14. Table 14 Environmental test for anti-corrosion layer
Tests of different environmental types, cycles
Test items
Alternating damp heat
Chemical corrosion gas test
Ultraviolet condensation test
Test method standard
GB/T 2423, 4
Test Db
OB/T 2423.17
Test Ka
GB/T 2423.33
Test Kea
Light 70℃ 8h
Condensation 50℃ 4h
Light wavelength
275 μm-~30 μm
Relative turbidity
95%--100%
General corrosion type
Wet heat plasticity
Medium corrosion type
Strong corrosion type
Light corrosion type
Medium corrosion type
Note 1: The UV condensation test piece is exposed to 70℃ for 8h, condensed at 50℃ for 4h, a total of [2 h is 1 adjustment period, and the softening period is 24h as " Note 2: Environmental condition levels are shown in Appendix G.
5.3 The performance test of the galvanized layer shall meet the following requirements. 5.3.1 The thickness (adhesion) shall be measured according to the "weight method" in Appendix B, or according to GB/T4955 and GB/T4956. The relative density of each note is 85%.
5.3.2 The adhesion shall be measured according to the "scribing and cross-cutting method" specified in GB/T 5270-1985, except for the plate thickness greater than 8mm, which shall be measured according to the "chain strike method" in Appendix D.
5.3.3 The uniformity shall be tested according to the method in Appendix C. 5.4 The performance test of the coating shall meet the following requirements. 5.4.1 The thickness shall be measured according to GB/T 1764 or GB/T 4956. 5.4.2 The adhesion shall be measured according to GB/T1720-1979. 5.4.3 The flexibility shall be measured according to GB/T 1731 Determination
5. 4. 4 Impact strength shall be determined in accordance with GB/T 1732. 5.4.5 The bending resistance of the fire-resistant coating shall be in accordance with item 7 of Appendix CECS24:1990. 5.4.6 The vibration resistance of the fire-resistant coating shall be in accordance with item 6 of Appendix 2 of CEC524:1990. 5.4.7 The water resistance of the fire-resistant coating shall be in accordance with item 8 of Appendix 2 of CEC24:1990. 8
5.4.8 The freeze-thaw resistance of the fire-resistant coating shall be in accordance with item 9 of Appendix 2 of CEC 24:1990. 5. 5 The connection resistance test of the tray and ladder rack shall be carried out in accordance with Appendix E. 5. 6 The fire resistance grade test of the fire-resistant cable tray shall be carried out in accordance with Appendix F. B Inspection rules
Product inspection is divided into factory inspection and type inspection. 6. 1 Factory inspection items are: a) appearance quality (full inspection); b) dimensional accuracy (sampling inspection); c) friction and adhesion of anti-corrosion layer (sampling inspection); d) joint surface quality [full inspection]; uniformity of hot-dip galvanizing layer (bundle inspection). 6. 2 Type inspection Type inspection should be carried out in the following cases. New product trial design and identification; after formal production, the material, structure and process have changed significantly; the product resumes production after one year of suspension; when the national quality inspection agency or certification organization requires the product to be subjected to type inspection. 6.2.2 The requirements and methods of type inspection are the entire contents of Chapter 4 and Chapter 5. 6.3 Product sampling and judgment rules
QB/T 1453-2003
6.3.1 Samples should be randomly sampled, and the number of samples for inspection should be 2% of each batch of products, but not less than 3 pieces. It is allowed to take 1 sample for load test. 6.3.2 If there is 1 unqualified sample in each batch of product samples, the second sample of the same batch of products can be sampled for inspection. If it is still unqualified, the batch of products is unqualified.
6.3.3 The amount of anti-corrosion layer can be directly inspected on the product or on the samples made of the same material and the same process. 7 Marking, packaging, transportation, storage
7. 1 Marking
7.1.1 Each batch of products should be equipped with an appropriate number of markings on the main components. The content may include: trademark, model, specification, manufacturer's name. 7.1.2 The outer packaging of the product should comply with the provisions of GB/T191. The marking content may include: product name (including model and specification when necessary), manufacturing name, factory date (year and month), project name or code, consignee, gross weight and net weight. 7.1.3 The marking should be clear and not easily damaged. 7.2 Packaging and transportation
7.2.1 Product packaging should be able to prevent mechanical damage during transportation, and appropriate packaging methods should be selected according to the mode of transportation and the specifications and shapes of the components, such as angle steel or fan steel, wooden boards, foam concrete packaging boxes, etc. The packaging boxes should be easy to lift and carry, and can also be classified or packaged according to user requirements. 7.2.2 The packaging box should be accompanied by a packing list, product certificate and factory inspection report. 7.3 Storage
7.3.1 The storage place of the bridge frame should be dry and covered, and should be protected from corrosion by corrosive substances such as acids, salts and alkalis. 7.3.2 The components of the bridge should be stacked in categories, and the layers should be separated by appropriate cushions to avoid heavy pressure. I
QB/T1453-2003
A1 Pallet and ladder test
Appendix A
(Normative Appendix)
Bridge load test
A.1.1 Specimen
The different thickness of pallet and ladder plate, side height, connection between crosspiece or bottom plate and side or the shape of any component constitute different design structures.
For each structure of pallet and ladder, take "a straight section without splicing" as the specimen. A.1.2 Support type and span
The test support type is a simply supported beam. The two ends and two sides of the pallet and ladder are not subject to any constraints. The support span is determined according to A.1.9a), with an error of ±30mm.
A.1.3 Bracket
The bracket is shown in Figure A.1.
Round steel 2 is welded to the base 3.1:.
1—Pallet, channel specimen: 2—$25 round: 3·Steel bracket base: 4—V-shaped steel (30mm wide, 20mm high, with 5mm deep, 120\ groove) Figure A. 1 Test bracket
A.1.4 Specimen positioning
The specimen is placed horizontally on the bracket, supported by V-shaped lanthanum bars at both ends. The center distance between the two round bars is the test span length, and the extension length at both ends of the specimen is equal.
A.1.5 Load material
The load material can be steel bars, lead ingots or other materials. The steel bar can be a fan steel with a thickness of 3mm, a width of 30mm~50mlm, and a length of no more than 1m. Other load materials: width not more than 125mm, length not more than 300mm, maximum weight not more than 5kg: A.1.6 Loading
In order to facilitate the addition of ladder rack specimens, it is allowed to place a steel plate or mesh plate with a thickness of 1mm and a length not more than 1m on the mold within the span of the bracket. The two steel plates cannot be overlapped, and the weight of the plate should be included in the total load weight. The distance between the load material and the side edge is 10m + 15mm.3 The dimensional limit deviation of other components shall comply with the provisions of Class C in GB/1804-1992. 4.6 The surface of the bridge shall be flat and smooth, and there shall be no burrs, sharp edges or other defects that may damage the cable insulation layer. 4.7 When the bridge system is used to form a grounding loop, the manufacturer shall indicate the minimum cross-sectional area of the tray and ladder in the longitudinal direction on the nameplate. The resistance value at the connection between the ends of the bridge shall not be greater than 0.00033.0. 5 Test method
5.1 The load shear test and the stretch test shall be carried out in accordance with the provisions of Appendix A. 5.2 The environmental test of the anti-corrosion layer shall be carried out in accordance with the provisions of Table 14. Table 14 Environmental test for anti-corrosion layer
Tests of different environmental types, cycles
Test items
Alternating damp heat
Chemical corrosion gas test
Ultraviolet condensation test
Test method standard
GB/T 2423, 4
Test Db
OB/T 2423.17
Test Ka
GB/T 2423.33
Test Kea
Light 70℃ 8h
Condensation 50℃ 4h
Light wavelength
275 μm-~30 μm
Relative turbidity
95%--100%
General corrosion type
Wet heat plasticity
Medium corrosion type
Strong corrosion type
Light corrosion type
Medium corrosion type
Note 1: The UV condensation test piece is exposed to 70℃ for 8h, condensed at 50℃ for 4h, a total of [2 h is 1 adjustment period, and the softening period is 24h as " Note 2: Environmental condition levels are shown in Appendix G.
5.3 The performance test of the galvanized layer shall meet the following requirements. 5.3.1 The thickness (adhesion) shall be measured according to the "weight method" in Appendix B, or according to GB/T4955 and GB/T4956. The relative density of each note is 85%.
5.3.2 The adhesion shall be measured according to the "scribing and cross-cutting method" specified in GB/T 5270-1985, except for the plate thickness greater than 8mm, which shall be measured according to the "chain strike method" in Appendix D.
5.3.3 The uniformity shall be tested according to the method in Appendix C. 5.4 The performance test of the coating shall meet the following requirements. 5.4.1 The thickness shall be measured according to GB/T 1764 or GB/T 4956. 5.4.2 The adhesion shall be measured according to GB/T1720-1979. 5.4.3 The flexibility shall be measured according to GB/T 1731 Determination
5. 4. 4 Impact strength shall be determined in accordance with GB/T 1732. 5.4.5 The bending resistance of the fire-resistant coating shall be in accordance with item 7 of Appendix CECS24:1990. 5.4.6 The vibration resistance of the fire-resistant coating shall be in accordance with item 6 of Appendix 2 of CEC524:1990. 5.4.7 The water resistance of the fire-resistant coating shall be in accordance with item 8 of Appendix 2 of CEC24:1990. 8
5.4.8 The freeze-thaw resistance of the fire-resistant coating shall be in accordance with item 9 of Appendix 2 of CEC 24:1990. 5. 5 The connection resistance test of the tray and ladder rack shall be carried out in accordance with Appendix E. 5. 6 The fire resistance grade test of the fire-resistant cable tray shall be carried out in accordance with Appendix F. B Inspection rules
Product inspection is divided into factory inspection and type inspection. 6. 1 Factory inspection items are: a) appearance quality (full inspection); b) dimensional accuracy (sampling inspection); c) friction and adhesion of anti-corrosion layer (sampling inspection); d) joint surface quality [full inspection]; uniformity of hot-dip galvanizing layer (bundle inspection). 6. 2 Type inspection Type inspection should be carried out in the following cases. New product trial design and identification; after formal production, the material, structure and process have changed significantly; the product resumes production after one year of suspension; when the national quality inspection agency or certification organization requires the product to be subjected to type inspection. 6.2.2 The requirements and methods of type inspection are the entire contents of Chapter 4 and Chapter 5. 6.3 Product sampling and judgment rules
QB/T 1453-2003
6.3.1 Samples should be randomly sampled, and the number of samples for inspection should be 2% of each batch of products, but not less than 3 pieces. It is allowed to take 1 sample for load test. 6.3.2 If there is 1 unqualified sample in each batch of product samples, the second sample of the same batch of products can be sampled for inspection. If it is still unqualified, the batch of products is unqualified.
6.3.3 The amount of anti-corrosion layer can be directly inspected on the product or on the samples made of the same material and the same process. 7 Marking, packaging, transportation, storage
7. 1 Marking
7.1.1 Each batch of products should be equipped with an appropriate number of markings on the main components. The content may include: trademark, model, specification, manufacturer's name. 7.1.2 The outer packaging of the product should comply with the provisions of GB/T191. The marking content may include: product name (including model and specification when necessary), manufacturing name, factory date (year and month), project name or code, consignee, gross weight and net weight. 7.1.3 The marking should be clear and not easily damaged. 7.2 Packaging and transportation
7.2.1 Product packaging should be able to prevent mechanical damage during transportation, and appropriate packaging methods should be selected according to the mode of transportation and the specifications and shapes of the components, such as angle steel or fan steel, wooden boards, foam concrete packaging boxes, etc. The packaging boxes should be easy to lift and carry, and can also be classified or packaged according to user requirements. 7.2.2 The packaging box should be accompanied by a packing list, product certificate and factory inspection report. 7.3 Storage
7.3.1 The storage place of the bridge frame should be dry and covered, and should be protected from corrosion by corrosive substances such as acids, salts and alkalis. 7.3.2 The components of the bridge should be stacked in categories, and the layers should be separated by appropriate cushions to avoid heavy pressure. I
QB/T1453-2003
A1 Pallet and ladder test
Appendix A
(Normative Appendix)
Bridge load test
A.1.1 Specimen
The different thickness of pallet and ladder plate, side height, connection between crosspiece or bottom plate and side or the shape of any component constitute different design structures.
For each structure of pallet and ladder, take "a straight section without splicing" as the specimen. A.1.2 Support type and span
The test support type is a simply supported beam. The two ends and two sides of the pallet and ladder are not subject to any constraints. The support span is determined according to A.1.9a), with an error of ±30mm.
A.1.3 Bracket
The bracket is shown in Figure A.1.
Round steel 2 is welded to the base 3.1:.
1—Pallet, channel specimen: 2—$25 round: 3·Steel bracket base: 4—V-shaped steel (30mm wide, 20mm high, with 5mm deep, 120\ groove) Figure A. 1 Test bracket
A.1.4 Specimen positioning
The specimen is placed horizontally on the bracket, supported by V-shaped lanthanum bars at both ends. The center distance between the two round bars is the test span length, and the extension length at both ends of the specimen is equal.
A.1.5 Load material
The load material can be steel bars, lead ingots or other materials. The steel bar can be a fan steel with a thickness of 3mm, a width of 30mm~50mlm, and a length of no more than 1m. Other load materials: width not more than 125mm, length not more than 300mm, maximum weight not more than 5kg: A.1.6 Loading
In order to facilitate the addition of ladder rack specimens, it is allowed to place a steel plate or mesh plate with a thickness of 1mm and a length not more than 1m on the mold within the span of the bracket. The two steel plates cannot be overlapped, and the weight of the plate should be included in the total load weight. The distance between the load material and the side edge is 10m + 15mm.3 The dimensional limit deviation of other components shall comply with the provisions of Class C in GB/1804-1992. 4.6 The surface of the bridge shall be flat and smooth, and there shall be no burrs, sharp edges or other defects that may damage the cable insulation layer. 4.7 When the bridge system is used to form a grounding loop, the manufacturer shall indicate the minimum cross-sectional area of the tray and ladder in the longitudinal direction on the nameplate. The resistance value at the connection between the ends of the bridge shall not be greater than 0.00033.0. 5 Test method
5.1 The load shear test and the stretch test shall be carried out in accordance with the provisions of Appendix A. 5.2 The environmental test of the anti-corrosion layer shall be carried out in accordance with the provisions of Table 14. Table 14 Environmental test for anti-corrosion layer
Tests of different environmental types, cycles
Test items
Alternating damp heat
Chemical corrosion gas test
Ultraviolet condensation test
Test method standard
GB/T 2423, 4
Test Db
OB/T 2423.17
Test Ka
GB/T 2423.33
Test Kea
Light 70℃ 8h
Condensation 50℃ 4h
Light wavelength
275 μm-~30 μm
Relative turbidity
95%--100%
General corrosion type
Wet heat plasticity
Medium corrosion type
Strong corrosion type
Light corrosion type
Medium corrosion type
Note 1: The UV condensation test piece is exposed to 70℃ for 8h, condensed at 50℃ for 4h, a total of [2 h is 1 adjustment period, and the softening period is 24h as " Note 2: Environmental condition levels are shown in Appendix G.
5.3 The performance test of the galvanized layer shall meet the following requirements. 5.3.1 The thickness (adhesion) shall be measured according to the "weight method" in Appendix B, or according to GB/T4955 and GB/T4956. The relative density of each note is 85%.
5.3.2 The adhesion shall be measured according to the "scribing and cross-cutting method" specified in GB/T 5270-1985, except for the plate thickness greater than 8mm, which shall be measured according to the "chain strike method" in Appendix D.
5.3.3 The uniformity shall be tested according to the method in Appendix C. 5.4 The performance test of the coating shall meet the following requirements. 5.4.1 The thickness shall be measured according to GB/T 1764 or GB/T 4956. 5.4.2 The adhesion shall be measured according to GB/T1720-1979. 5.4.3 The flexibility shall be measured according to GB/T 1731 Determination
5. 4. 4 Impact strength shall be determined in accordance with GB/T 1732. 5.4.5 The bending resistance of the fire-resistant coating shall be in accordance with item 7 of Appendix CECS24:1990. 5.4.6 The vibration resistance of the fire-resistant coating shall be in accordance with item 6 of Appendix 2 of CEC524:1990. 5.4.7 The water resistance of the fire-resistant coating shall be in accordance with item 8 of Appendix 2 of CEC24:1990. 8
5.4.8 The freeze-thaw resistance of the fire-resistant coating shall be in accordance with item 9 of Appendix 2 of CEC 24:1990. 5. 5 The connection resistance test of the tray and ladder rack shall be carried out in accordance with Appendix E. 5. 6 The fire resistance grade test of the fire-resistant cable tray shall be carried out in accordance with Appendix F. B Inspection rules
Product inspection is divided into factory inspection and type inspection. 6. 1 Factory inspection items are: a) appearance quality (full inspection); b) dimensional accuracy (sampling inspection); c) friction and adhesion of anti-corrosion layer (sampling inspection); d) joint surface quality [full inspection]; uniformity of hot-dip galvanizing layer (bundle inspection). 6. 2 Type inspection Type inspection should be carried out in the following cases. New product trial design and identification; after formal production, the material, structure and process have changed significantly; the product resumes production after one year of suspension; when the national quality inspection agency or certification organization requires the product to be subjected to type inspection. 6.2.2 The requirements and methods of type inspection are the entire contents of Chapter 4 and Chapter 5. 6.3 Product sampling and judgment rules
QB/T 1453-2003
6.3.1 Samples should be randomly sampled, and the number of samples for inspection should be 2% of each batch of products, but not less than 3 pieces. It is allowed to take 1 sample for load test. 6.3.2 If there is 1 unqualified sample in each batch of product samples, the second sample of the same batch of products can be sampled for inspection. If it is still unqualified, the batch of products is unqualified.
6.3.3 The amount of anti-corrosion layer can be directly inspected on the product or on the samples made of the same material and the same process. 7 Marking, packaging, transportation, storage
7. 1 Marking
7.1.1 Each batch of products should be equipped with an appropriate number of markings on the main components. The content may include: trademark, model, specification, manufacturer's name. 7.1.2 The outer packaging of the product should comply with the provisions of GB/T191. The marking content may include: product name (including model and specification when necessary), manufacturing name, factory date (year and month), project name or code, consignee, gross weight and net weight. 7.1.3 The marking should be clear and not easily damaged. 7.2 Packaging and transportation
7.2.1 Product packaging should be able to prevent mechanical damage during transportation, and appropriate packaging methods should be selected according to the mode of transportation and the specifications and shapes of the components, such as angle steel or fan steel, wooden boards, foam concrete packaging boxes, etc. The packaging boxes should be easy to lift and carry, and can also be classified or packaged according to user requirements. 7.2.2 The packaging box should be accompanied by a packing list, product certificate and factory inspection report. 7.3 Storage
7.3.1 The storage place of the bridge frame should be dry and covered, and should be protected from corrosion by corrosive substances such as acids, salts and alkalis. 7.3.2 The components of the bridge should be stacked in categories, and the layers should be separated by appropriate cushions to avoid heavy pressure. I
QB/T1453-2003
A1 Pallet and ladder test
Appendix A
(Normative Appendix)
Bridge load test
A.1.1 Specimen
The different thickness of pallet and ladder plate, side height, connection between crosspiece or bottom plate and side or the shape of any component constitute different design structures.
For each structure of pallet and ladder, take "a straight section without splicing" as the specimen. A.1.2 Support type and span
The test support type is a simply supported beam. The two ends and two sides of the pallet and ladder are not subject to any constraints. The support span is determined according to A.1.9a), with an error of ±30mm.
A.1.3 Bracket
The bracket is shown in Figure A.1.
Round steel 2 is welded to the base 3.1:.
1—Pallet, channel specimen: 2—$25 round: 3·Steel bracket base: 4—V-shaped steel (30mm wide, 20mm high, with 5mm deep, 120\ groove) Figure A. 1 Test bracket
A.1.4 Specimen positioning
The specimen is placed horizontally on the bracket, supported by V-shaped lanthanum bars at both ends. The center distance between the two round bars is the test span length, and the extension length at both ends of the specimen is equal.
A.1.5 Load material
The load material can be steel bars, lead ingots or other materials. The steel bar can be a fan steel with a thickness of 3mm, a width of 30mm~50mlm, and a length of no more than 1m. Other load materials: width not more than 125mm, length not more than 300mm, maximum weight not more than 5kg: A.1.6 Loading
In order to facilitate the addition of ladder rack specimens, it is allowed to place a steel plate or mesh plate with a thickness of 1mm and a length not more than 1m on the mold within the span of the bracket. The two steel plates cannot be overlapped, and the weight of the plate should be included in the total load weight. The distance between the load material and the side edge is 10m + 15mm.33
Test Kea
Illumination at 70℃ for 8h
Condensation at 50℃ for 4h
Light wavelength
275 μm-~30 μm
Relative density
95%--100%
General type
Wet heat plasticity
Medium corrosion type
Strong corrosion type
Light corrosion type
Medium corrosion type
Note 1: The ultraviolet condensation test piece is exposed to 70℃ for 8h and condensed at 50℃ for 4h, with a total of [2 h as 1 adjustment period, and the soft press is 24h as " Note 2: Environmental condition levels are shown in Appendix G.
5.3 The performance test of the galvanized layer shall meet the following requirements. 5.3.1 The thickness (adhesion) shall be measured according to the "weight method" in Appendix B, or according to GB/T4955 and GB/T4956. The relative density of each note is 85%.
5.3.2 The adhesion shall be measured according to the "scribing and cross-cutting method" specified in GB/T 5270-1985, except for the plate thickness greater than 8mm, which shall be measured according to the "chain strike method" in Appendix D.
5.3.3 The uniformity shall be tested according to the method in Appendix C. 5.4 The performance test of the coating shall meet the following requirements. 5.4.1 The thickness shall be measured according to GB/T 1764 or GB/T 4956. 5.4.2 The adhesion shall be measured according to GB/T1720-1979. 5.4.3 The flexibility shall be measured according to GB/T 1731 Determination
5. 4. 4 Impact strength shall be determined in accordance with GB/T 1732. 5.4.5 The bending resistance of the fire-resistant coating shall be in accordance with item 7 of Appendix CECS24:1990. 5.4.6 The vibration resistance of the fire-resistant coating shall be in accordance with item 6 of Appendix 2 of CEC524:1990. 5.4.7 The water resistance of the fire-resistant coating shall be in accordance with item 8 of Appendix 2 of CEC24:1990. 8
5.4.8 The freeze-thaw resistance of the fire-resistant coating shall be in accordance with item 9 of Appendix 2 of CEC 24:1990. 5. 5 The connection resistance test of the tray and ladder rack shall be carried out in accordance with Appendix E. 5. 6 The fire resistance grade test of the fire-resistant cable tray shall be carried out in accordance with Appendix F. B Inspection rules
Product inspection is divided into factory inspection and type inspection. 6. 1 Factory inspection items are: a) appearance quality (full inspection); b) dimensional accuracy (sampling inspection); c) friction and adhesion of anti-corrosion layer (sampling inspection); d) joint surface quality [full inspection]; uniformity of hot-dip galvanizing layer (bundle inspection). 6. 2 Type inspection Type inspection should be carried out in the following cases. New product trial design and identification; after formal production, the material, structure and process have changed significantly; the product resumes production after one year of suspension; when the national quality inspection agency or certification organization requires the product to be subjected to type inspection. 6.2.2 The requirements and methods of type inspection are the entire contents of Chapter 4 and Chapter 5. 6.3 Product sampling and judgment rules
QB/T 1453-2003
6.3.1 Samples should be randomly sampled, and the number of samples for inspection should be 2% of each batch of products, but not less than 3 pieces. It is allowed to take 1 sample for load test. 6.3.2 If there is 1 unqualified sample in each batch of product samples, the second sample of the same batch of products can be sampled for inspection. If it is still unqualified, the batch of products is unqualified.
6.3.3 The amount of anti-corrosion layer can be directly inspected on the product or on the samples made of the same material and the same process. 7 Marking, packaging, transportation, storage
7. 1 Marking
7.1.1 Each batch of products should be equipped with an appropriate number of markings on the main components. The content may include: trademark, model, specification, manufacturer's name. 7.1.2 The outer packaging of the product should comply with the provisions of GB/T191. The marking content may include: product name (including model and specification when necessary), manufacturing name, factory date (year and month), project name or code, consignee, gross weight and net weight. 7.1.3 The marking should be clear and not easily damaged. 7.2 Packaging and transportation
7.2.1 Product packaging should be able to prevent mechanical damage during transportation, and appropriate packaging methods should be selected according to the mode of transportation and the specifications and shapes of the components, such as angle steel or fan steel, wooden boards, foam concrete packaging boxes, etc. The packaging boxes should be easy to lift and carry, and can also be classified or packaged according to user requirements. 7.2.2 The packaging box should be accompanied by a packing list, product certificate and factory inspection report. 7.3 Storage
7.3.1 The storage place of the bridge frame should be dry and covered, and should be protected from corrosion by corrosive substances such as acids, salts and alkalis. 7.3.2 The components of the bridge should be stacked in categories, and the layers should be separated by appropriate cushions to avoid heavy pressure. I
QB/T1453-2003
A1 Pallet and ladder test
Appendix A
(Normative Appendix)
Bridge load test
A.1.1 Specimen
The different thickness of pallet and ladder plate, side height, connection between crosspiece or bottom plate and side or the shape of any component constitute different design structures.
For each structure of pallet and ladder, take "a straight section without splicing" as the specimen. A.1.2 Support type and span
The test support type is a simply supported beam. The two ends and two sides of the pallet and ladder are not subject to any constraints. The support span is determined according to A.1.9a), with an error of ±30mm.
A.1.3 Bracket
The bracket is shown in Figure A.1.
Round steel 2 is welded to the base 3.1:.
1—Pallet, channel specimen: 2—$25 round: 3·Steel bracket base: 4—V-shaped steel (30mm wide, 20mm high, with 5mm deep, 120\ groove) Figure A. 1 Test bracket
A.1.4 Specimen positioning
The specimen is placed horizontally on the bracket, supported by V-shaped lanthanum bars at both ends. The center distance between the two round bars is the test span length, and the extension length at both ends of the specimen is equal.
A.1.5 Load material
The load material can be steel bars, lead ingots or other materials. The steel bar can be a fan steel with a thickness of 3mm, a width of 30mm~50mlm, and a length of no more than 1m. Other load materials: width not more than 125mm, length not more than 300mm, maximum weight not more than 5kg: A.1.6 Loading
In order to facilitate the addition of ladder rack specimens, it is allowed to place a steel plate or mesh plate with a thickness of 1mm and a length not more than 1m on the mold within the span of the bracket. The two steel plates cannot be overlapped, and the weight of the plate should be included in the total load weight. The distance between the load material and the side edge is 10m + 15mm.33
Test Kea
Illumination at 70℃ for 8h
Condensation at 50℃ for 4h
Light wavelength
275 μm-~30 μm
Relative density
95%--100%
General type
Wet heat plasticity
Medium corrosion type
Strong corrosion type
Light corrosion type
Medium corrosion type
Note 1: The ultraviolet condensation test piece is exposed to 70℃ for 8h and condensed at 50℃ for 4h, with a total of [2 h as 1 adjustment period, and the soft press is 24h as " Note 2: Environmental condition levels are shown in Appendix G.
5.3 The performance test of the galvanized layer shall meet the following requirements. 5.3.1 The thickness (adhesion) shall be measured according to the "weight method" in Appendix B, or according to GB/T4955 and GB/T4956. The relative density of each note is 85%.
5.3.2 The adhesion shall be measured according to the "scribing and cross-cutting method" specified in GB/T 5270-1985, except for the plate thickness greater than 8mm, which shall be measured according to the "chain strike method" in Appendix D.
5.3.3 The uniformity shall be tested according to the method in Appendix C. 5.4 The performance test of the coating shall meet the following requirements. 5.4.1 The thickness shall be measured according to GB/T 1764 or GB/T 4956. 5.4.2 The adhesion shall be measured according to GB/T1720-1979. 5.4.3 The flexibility shall be measured according to GB/T 1731 Determination
5. 4. 4 Impact strength shall be determined in accordance with GB/T 1732. 5.4.5 The bending resistance of the fire-resistant coating shall be in accordance with item 7 of Appendix CECS24:1990. 5.4.6 The vibration resistance of the fire-resistant coating shall be in accordance with item 6 of Appendix 2 of CEC524:1990. 5.4.7 The water resistance of the fire-resistant coating shall be in accordance with item 8 of Appendix 2 of CEC24:1990. 8
5.4.8 The freeze-thaw resistance of the fire-resistant coating shall be in accordance with item 9 of Appendix 2 of CEC 24:1990. 5. 5 The connection resistance test of the tray and ladder rack shall be carried out in accordance with Appendix E. 5. 6 The fire resistance grade test of the fire-resistant cable tray shall be carried out in accordance with Appendix F. B Inspection rules
Product inspection is divided into factory inspection and type inspection. 6. 1 Factory inspection items are: a) appearance quality (full inspection); b) dimensional accuracy (sampling inspection); c) friction and adhesion of anti-corrosion layer (sampling inspection); d) joint surface quality [full inspection]; uniformity of hot-dip galvanizing layer (bundle inspection). 6. 2 Type inspection Type inspection should be carried out in the following cases. New product trial design and identification; after formal production, the material, structure and process have changed significantly; the product resumes production after one year of suspension; when the national quality inspection agency or certification organization requires the product to be subjected to type inspection. 6.2.2 The requirements and methods of type inspection are the entire contents of Chapter 4 and Chapter 5. 6.3 Product sampling and judgment rules
QB/T 1453-2003
6.3.1 Samples should be randomly sampled, and the number of samples for inspection should be 2% of each batch of products, but not less than 3 pieces. It is allowed to take 1 sample for load test. 6.3.2 If there is 1 unqualified sample in each batch of product samples, the second sample of the same batch of products can be sampled for inspection. If it is still unqualified, the batch of products is unqualified.
6.3.3 The amount of anti-corrosion layer can be directly inspected on the product or on the samples made of the same material and the same process. 7 Marking, packaging, transportation, storage
7. 1 Marking
7.1.1 Each batch of products should be equipped with an appropriate number of markings on the main components. The content may include: trademark, model, specification, manufacturer's name. 7.1.2 The outer packaging of the product should comply with the provisions of GB/T191. The marking content may include: product name (including model and specification when necessary), manufacturing name, factory date (year and month), project name or code, consignee, gross weight and net weight. 7.1.3 The marking should be clear and not easily damaged. 7.2 Packaging and transportation
7.2.1 Product packaging should be able to prevent mechanical damage during transportation, and appropriate packaging methods should be selected according to the mode of transportation and the specifications and shapes of the components, such as angle steel or fan steel, wooden boards, foam concrete packaging boxes, etc. The packaging boxes should be easy to lift and carry, and can also be classified or packaged according to user requirements. 7.2.2 The packaging box should be accompanied by a packing list, product certificate and factory inspection report. 7.3 Storage
7.3.1 The storage place of the bridge frame should be dry and covered, and should be protected from corrosion by corrosive substances such as acids, salts and alkalis. 7.3.2 The components of the bridge should be stacked in categories, and the layers should be separated by appropriate cushions to avoid heavy pressure. I
QB/T1453-2003
A1 Pallet and ladder test
Appendix A
(Normative Appendix)
Bridge load test
A.1.1 Specimen
The different thickness of pallet and ladder plate, side height, connection between crosspiece or bottom plate and side or the shape of any component constitute different design structures.
For each structure of pallet and ladder, take "a straight section without splicing" as the specimen. A.1.2 Support type and span
The test support type is a simply supported beam. The two ends and two sides of the pallet and ladder are not subject to any constraints. The support span is determined according to A.1.9a), with an error of ±30mm.
A.1.3 Bracket
The bracket is shown in Figure A.1.
Round steel 2 is welded to the base 3.1:.
1—Pallet, channel specimen: 2—$25 round: 3·Steel bracket base: 4—V-shaped steel (30mm wide, 20mm high, with 5mm deep, 120\ groove) Figure A. 1 Test bracketbzxz.net
A.1.4 Specimen positioning
The specimen is placed horizontally on the bracket, supported by V-shaped lanthanum bars at both ends. The center distance between the two round bars is the test span length, and the extension length at both ends of the specimen is equal.
A.1.5 Load material
The load material can be steel bars, lead ingots or other materials. The steel bar can be a fan steel with a thickness of 3mm, a width of 30mm~50mlm, and a length of no more than 1m. Other load materials: width not more than 125mm, length not more than 300mm, maximum weight not more than 5kg: A.1.6 Loading
In order to facilitate the addition of ladder rack specimens, it is allowed to place a steel plate or mesh plate with a thickness of 1mm and a length not more than 1m on the mold within the span of the bracket. The two steel plates cannot be overlapped, and the weight of the plate should be included in the total load weight. The distance between the load material and the side edge is 10m + 15mm.1 Delivery inspection
The delivery inspection items are:
a) Appearance quality (full inspection);
b) Dimensional accuracy (sampling inspection);
friction and adhesion of anti-corrosion layer (sampling inspection);
d) Surface quality of joints [full inspection};
uniformity of hot-dip galvanizing layer (bundle inspection).
6. 2 Type inspection
Type inspection shall be carried out in the following cases. New product trial design and identification;
After formal production, the material, structure and process have changed significantly; The product is resumed after one year of suspension;
When the national quality inspection agency or certification organization requires the product to be subjected to type inspection. 6.2.2 The requirements and methods of type inspection are the entire contents of Chapter 4 and Chapter 5. 6.3 Product sampling and judgment rules
QB/T 1453-2003
6.3.1 Samples should be randomly sampled, and the number of samples for inspection should be 2% of each batch of products, but not less than 3 pieces. It is allowed to take 1 sample for load test. 6.3.2 If there is 1 unqualified sample in each batch of product samples, the second sample of the same batch of products can be sampled for inspection. If it is still unqualified, the batch of products is unqualified.
6.3.3 The amount of anti-corrosion layer can be directly inspected on the product or on the samples made of the same material and the same process. 7 Marking, packaging, transportation, storage
7. 1 Marking
7.1.1 Each batch of products should be equipped with an appropriate number of markings on the main components. The content may include: trademark, model, specification, manufacturer's name. 7.1.2 The outer packaging of the product should comply with the provisions of GB/T191. The marking content may include: product name (including model and specification when necessary), manufacturing name, factory date (year and month), project name or code, consignee, gross weight and net weight. 7.1.3 The marking should be clear and not easily damaged. 7.2 Packaging and transportation
7.2.1 Product packaging should be able to prevent mechanical damage during transportation, and appropriate packaging methods should be selected according to the mode of transportation and the specifications and shapes of the components, such as angle steel or fan steel, wooden boards, foam concrete packaging boxes, etc. The packaging boxes should be easy to lift and carry, and can also be classified or packaged according to user requirements. 7.2.2 The packaging box should be accompanied by a packing list, product certificate and factory inspection report. 7.3 Storage
7.3.1 The storage place of the bridge frame should be dry and covered, and should be protected from corrosion by corrosive substances such as acids, salts and alkalis. 7.3.2 The components of the bridge should be stacked in categories, and the layers should be separated by appropriate cushions to avoid heavy pressure. I
QB/T1453-2003
A1 Pallet and ladder test
Appendix A
(Normative Appendix)
Bridge load test
A.1.1 Specimen
The different thickness of pallet and ladder plate, side height, connection between crosspiece or bottom plate and side or the shape of any component constitute different design structures.
For each structure of pallet and ladder, take "a straight section without splicing" as the specimen. A.1.2 Support type and span
The test support type is a simply supported beam. The two ends and two sides of the pallet and ladder are not subject to any constraints. The support span is determined according to A.1.9a), with an error of ±30mm.
A.1.3 Bracket
The bracket is shown in Figure A.1.
Round steel 2 is welded to the base 3.1:.
1—Pallet, channel specimen: 2—$25 round: 3·Steel bracket base: 4—V-shaped steel (30mm wide, 20mm high, with 5mm deep, 120\ groove) Figure A. 1 Test bracket
A.1.4 Specimen positioning
The specimen is placed horizontally on the bracket, supported by V-shaped lanthanum bars at both ends. The center distance between the two round bars is the test span length, and the extension length at both ends of the specimen is equal.
A.1.5 Load material
The load material can be steel bars, lead ingots or other materials. The steel bar can be a fan steel with a thickness of 3mm, a width of 30mm~50mlm, and a length of no more than 1m. Other load materials: width not more than 125mm, length not more than 300mm, maximum weight not more than 5kg: A.1.6 Loading
In order to facilitate the addition of ladder rack specimens, it is allowed to place a steel plate or mesh plate with a thickness of 1mm and a length not more than 1m on the mold within the span of the bracket. The two steel plates cannot be overlapped, and the weight of the plate should be included in the total load weight. The distance between the load material and the side edge is 10m + 15mm.1 Delivery inspection
The delivery inspection items are:
a) Appearance quality (full inspection);
b) Dimensional accuracy (sampling inspection);
friction and adhesion of anti-corrosion layer (sampling inspection);
d) Surface quality of joints [full inspection};
uniformity of hot-dip galvanizing layer (bundle inspection).
6. 2 Type inspection
Type inspection shall be carried out in the following cases. New product trial design and identification;
After formal production, the material, structure and process have changed significantly; The product is resumed after one year of suspension;
When the national quality inspection agency or certification organization requires the product to be subjected to type inspection. 6.2.2 The requirements and methods of type inspection are the entire contents of Chapter 4 and Chapter 5. 6.3 Product sampling and judgment rules
QB/T 1453-2003
6.3.1 Samples should be randomly sampled, and the number of samples for inspection should be 2% of each batch of products, but not less than 3 pieces. It is allowed to take 1 sample for load test. 6.3.2 If there is 1 unqualified sample in each batch of product samples, the second sample of the same batch of products can be sampled for inspection. If it is still unqualified, the batch of products is unqualified.
6.3.3 The amount of anti-corrosion layer can be directly in
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