Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB14040—93
Prestressed concrete hollow-core slabs
Prestressed concrete hollow-core slabsConstruction Standard
1993-01-06Published
1993-10-01Implemented
Published by the State Bureau of Technical Supervision
W Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Prestressed concrete hollow-core slabs
Prestressed concrete hollow-core slabs1 Subject Content and Scope of Application
GB14040—93
This standard specifies the specification size and model compilation method, technical requirements, test methods, inspection rules, marking, stacking and transportation of prestressed concrete hollow-core slabs (hereinafter referred to as slabs). This standard applies to floor slabs and roof slabs of general industrial and civil buildings. For plates in an erosive environment, with a surface temperature higher than 100°C, or with a production heat source and a surface temperature often higher than 60°C, or plates affected by vibration, the relevant current national standards and specifications shall be observed. 2 Reference standards
Portland cement, ordinary Portland cement
GB1344
Portland slag cement, pozzolanic Portland cement, Portland fly ash cement JGJ53
GBJ119
Quality standards and test methods for crushed stone and pebbles for ordinary concrete Quality standards and test methods for sand for ordinary concrete Standards for water used in concrete mixing
Quality standards and test methods for concrete water reducers Technical specifications for the application of coagulant admixtures
GB4463
GB5223
GBJ107
Heat treatment for prestressed concrete Rebar
Steel wire for prestressed concrete
Ordinary low carbon steel hot-rolled round wire rod
Carbon structural steel
Test methods for mechanical properties of ordinary concrete
Concrete strength inspection and evaluation standards
Code for design of concrete structures
GBJ204
Code for construction and acceptance of concrete structure engineering 9 Code for design and construction of prestressed concrete components with cold-drawn steel wire JGJ19
Quality inspection and evaluation standards for precast concrete components GBJ321
3 Specifications, dimensions and model compilation methods
3.1 The main specifications and dimensions of the plate should be adopted according to Table 1. Approved by the State Bureau of Technical Supervision on January 6, 1993 and implemented on October 1, 1993
Engineering Construction Standard Full Text Information System
Marking Width
Marking Length
3.2 The model of the plate consists of the name, marking length, marking width, and load level, and is expressed as follows: Y-KB
Load level
Marking Width
Marking Length
Prestressed Concrete Hollow Slab
Note: The specific value represented by the load level is given by the design drawings. 3.3 Model Example
The model of the prestressed concrete hollow slab with a marking length of 4.2m, a marking width of 600mm, and a load level of 2 is: Y-—KB426—2
3.4 The difference between the length and width of the plate and the length and width of the marking should meet the requirements of the design drawings. 6.0
3.5 The longitudinal sides of the board shall be provided with the side grooves shown in Figures 1 and 2 or other forms of side grooves that can ensure that the boards form an integral whole after grouting. 3.6 The dimensions of each part of the board section. They shall comply with the provisions of Figure 1 or Figure 2 and Table 2. Figure 1
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b—board width; b1—side rib width 1—board bottom thickness; h—board height; b2—middle rib width t2—board surface thickness, h1—lower tooth height, h2——upper tooth height, r—side groove radius
The hollow ratio of the ratio of the total area of the circular hole to the cross-sectional area of the board shall comply with the provisions of Table 3. Table 3
Board height, mm
Aperture, mm
Note: ① When calculating the hollow ratio, the board width is calculated as the average value of the upper and lower board widths. ② The hollow ratio of a board with a width of 500 can be reduced by 1.0% compared to the value in the table. ③ When other sizes of apertures must be used, the hollow ratio shall not be less than the value in the table. 3.8 The cross section of the plate shall comply with the provisions of 3.6 and 3.7 at the same time. 4 Technical requirements
4.1 The plate shall be produced in accordance with the provisions of this standard and the design drawings approved by the prescribed procedures. 4.2 Materials
Hollow ratio of plate, %
4.2.1 The quality of raw materials for concrete shall comply with the provisions of GB175, GB1344, JGJ52, JGJ53, JGJ56, JGJ63, and GBJ119 respectively.
4.2.2 Steel
4.2.2.1 Prestressed steel bars should be notched steel wires, heat-treated steel bars, cold-drawn Grade I, III, IV steel bars, cold-drawn low-alloy steel wires (also called cold-drawn medium-strength steel wires), Grade A cold-drawn low-carbon steel wires, and other prestressed steel bars and steel wires that meet national standards. Their materials and properties should comply with the provisions of GB5223, GB4463, GBJ204, and JGJ19, respectively. 4.2.2.2 The types of prestressed steel bars for plates of different specifications should be selected according to Table 4. w.bzsoso:com Engineering Construction Standard Full Text Information System
Plate thickness, mm
Types of prestressed steel bars
Cold drawn low alloy steel wire, Class A cold drawn low carbon steel wireCold drawn low alloy steel wire, cold drawn Class I, III, IV, heat treated steel bars, notched steel wire4.2.2.3 Non-prestressed steel bars should be made of Class B cold drawn low carbon steel wire and other steel bars and steel wires that meet national standards, and their performance should comply with the provisions of JGJ19.
4.2.2.4The lifting ring should be made of Class I hot rolled steel bars that have not been cold drawn, and the embedded steel plate should be made of No. 3 steel, and its material should comply with the provisions of GB701 and GB700 respectively.
4.2.2.5The steel bars, steel wires and embedded steel materials should have factory quality certificates and factory test reports, and should be stored strictly according to steel grades and specifications, and should not be mixed, and should be prevented from rust and pollution. 4.3 Concrete strength
4.3.1 The concrete strength grade should not be lower than C30. When heat-treated steel bars are used as prestressed bars, the concrete strength grade should not be lower than C40.
4.3.2 The concrete strength when the prestressed bars are stretched must meet the design requirements; when there are no clear requirements in the design, it shall not be lower than 75% of the standard value of the designed concrete cube compressive strength.
4.4 Construction requirements
4.4.1 The concrete protective layer of prestressed steel bars and steel wires shall meet the requirements of the design drawings, shall not be less than 15mm, and shall not be less than the diameter of the steel bars.
4.4.2 When cold-drawn low-alloy steel wire and Class A cold-drawn low-carbon steel wire are used as prestressed bars, the net distance should not be less than 15mm. When it is difficult to arrange, two bars can be used in parallel.
4.4.3 The extended length of the main bars at the plate end shall meet the design requirements. 4.5 The location and number of steel bar and steel wire joints shall comply with the provisions of GBJ204 and JGJ19. 4.6 Technical requirements for applying prestress
4.6.1 The tension control stress of prestressed tendons shall comply with the design requirements. The percentage deviation between the actual total prestress value established by the prestressed tendons and the inspection specified value shall not exceed ±5%.
4.6.2 The number of prestressed steel wires that are broken or slipped is strictly prohibited from exceeding 5% of the total number of roots, and it is strictly prohibited for two adjacent prestressed steel wires to be broken or slipped. The steel wires that are broken or slipped before pouring concrete must be replaced. 4.7 The production process of the board shall comply with the relevant provisions of GBJ204 and JGJ19. 4.7.1 The steel bars and steel wires shall be correctly set according to the design drawings, and measures shall be taken to prevent the isolation agent from contaminating the steel bars and steel wires. 4.8 The appearance quality of the board shall comply with the provisions of Table 5. W.bzsoso.con Engineering Construction Standard Full-text Information System
Defects at the ends of the slab
Surface defects
Any part
Main stress-bearing part
Secondary part
Longitudinal crackswww.bzxz.net
Transverse cracks on the slab surface
Cracks at the bottom of the slab
Loose concrete or protruding main reinforcement
Bottom surface of the slab
Side surface of the slab
Appearance defects
Surface stains
Note: Exposed reinforcement refers to the defect that the steel bars in the slab are not wrapped by concrete and are exposed. Quality requirements
Should not have
Total exposed length not exceeding 500mm
Should not have
Should not have
Total area not exceeding 1% of the board area, and no more than 0.01m2 at each location
Total length not exceeding L/3, seam width not exceeding 0.15mmLength not exceeding 1/2 of the board width, and not extending to the side, seam width not exceeding 0.15mm
Should not have
Should not have
Should not have
Not to be
Should not have
② Holes refer to holes in the concrete whose depth and length exceed the thickness of the protective layer. ③ Honeycombs refer to defects in the concrete surface where cement mortar is lacking and stones are exposed. Cracks refer to gaps extending into the concrete.
③ Defects at the end of the board refer to defects such as loose concrete or loose reinforcement at the end of the board. ③ Shape defects refer to defects such as uneven, tilted, missing edges and corners, straight edges and convex rib scars at the end of the board. ③ Surface defects refer to roughness, peeling, sanding and missing smearing on the surface of the board. ③ Surface stains refer to oil or sticky debris on the surface of the component. 4.9 For defects that do not exceed the honeycombs specified in Table 5 and do not affect the structural performance and installation and use performance, it is allowed to use fine stone concrete of a higher strength grade to repair them in time.
4.10 The allowable deviation of the external dimensions and related requirements of the slab shall comply with the provisions of Table 6. Engineering Construction Standard Full Text Information System
Pre-prepared parts
Lateral bending
Surface flatness
Center position deviation
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Reserved extension reinforcement length
Slab deadweight
Deviation between the center position of the prestressed tendon in the slab width direction and the specified position Note: ① Item 11 is only used for type testing. ②L is the slab length.
Allowable deviation, mm
+10,-5
The structural performance of the slab, including bearing capacity, deflection, crack resistance (or crack width), shall be tested. The results shall comply with the requirements of the design drawings and the provisions of GBJ321.
Test methods
The test items and test methods of various raw materials shall comply with the relevant current national standards. 5.2
2 The inspection and evaluation of concrete strength shall comply with the provisions of GBJ107, and the test methods shall comply with the provisions of GBJ81; 5.3 The test methods of structural performance shall comply with the provisions of Appendix 2 of GBJ321 and the design drawings. The test parameters and inspection indicators are given by the design drawings according to the provisions of Appendix 1 of GBJ321. 5.4 The inspection method of the total value of the prestress actually established by the prestressed tendons shall be measured and checked 1 hour after tensioning using a jack or a tension measuring instrument. 5.5
The appearance quality inspection method shall be carried out in accordance with the provisions of Table 7. Table 7
Any part
Inspection method
Observation, measurement with ruler
W Engineering Construction Standard Full-text Information System
Defects at the end of the plate
Surface defects
Continued Table 7
Main stress-bearing parts
Secondary parts
Longitudinal cracks
Transverse cracks on the plate surface
Cracks at the bottom of the plate
Loose concrete or loose extended main reinforcement
Bottom surface of the plate
Side surface of the plate
Surface defects
Surface stains
5.6 The inspection method for external dimensions and related requirements shall be carried out in accordance with the provisions of Table 8. Table 8
Pre-prepared parts
Lateral bending
Surface flatness
Center position
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Inspection method
Observation or measurement with a hundred-grid
Observation and measurement with a ruler and a scale magnifying glass
Observation, shaking
Testing method
Measure any part parallel to the length direction of the plate with a ruler
Measure any part of the bottom
surface perpendicular to the length direction of the plate with a ruler
Measure any part vertically perpendicular to the long side with a ruler
Measure with a ruler using a wire, use a 2m ruler and a wedge-shaped feeler gauge at the maximum lateral bending, and measure with a ruler|| tt||The maximum gap between ruler and two points on the slab surface
Use ruler to measure the center
line in the longitudinal and transverse directions and take the larger value
Measure with a flat ruler and a steel plate ruler
Measure with a ruler or a steel bar protective layer thickness measurement
Instrument
Measure the difference between the two diagonals on the slab surface with a ruler
W.bzsoso：cOn Engineering Construction Standard Full-text Information System
Continued Table 8
Reserved length of protruding steel bars
Slab deadweight
Deviation of the center position of the prestressed tendons in the slab width direction from the specified position 6 Inspection rules
6.1 Factory inspection
6.1.1 Inspection items
Mainly include the appearance quality, external dimensions and structural performance of steel bars and concrete slabs. Testing method
Measure at both ends of the board with a leveling ruler
Measure at both ends of the board with a ruler
Measure with a weighing instrument
Measure with a ruler
6.1.2 Inspection batch, sampling quantity, inspection and re-inspection rules, etc. Shall comply with the provisions of GBJ321. 6.2 Type inspection
6.2.1 Inspection conditions
Type inspection shall be carried out in any of the following circumstances. a.
When the product is transferred to another factory for production or put into production for the first time for trial production and identification; when the product is stopped for more than half a year and then resumed for production; when there are major changes in design, process and materials that may affect product performance; when there is a major difference between the factory inspection results and the last type inspection; periodic inspection during normal production;
When the superior quality supervision and inspection agency makes an inspection request. 6.2.2 Inspection items
Inspect item by item according to the technical requirements of this standard. 6.2.3 Determine the inspection batch according to the provisions of the inspection conditions. Measure the appearance quality and dimensions piece by piece or randomly sample 5% and no less than 3 pieces in the inspection batch; determine the number of structural performance inspections according to the inspection conditions. Inspection and re-inspection rules shall be carried out in accordance with the provisions of GBJ321. 6.3 Result evaluation
6.3.1 The quality supervision and inspection department of the supplier shall inspect the products in accordance with this standard and relevant standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3
Type inspection results are qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 Marking
The board should be equipped with permanent markings, which include: manufacturer name or trademark;
model;
production date (year, month, day);
inspection pass stamp.
7.2 Stacking and transportation
7.2.1 The boards should be stacked according to the model, quality grade, variety and production date. w.bzsoso:com Engineering Construction Standard Full Text Information System
7.2.2 The supporting position of the boards during stacking should be in accordance with the stress conditions of the boards. Pads should be set at both ends. The pads should be aligned up and down, flat and solid, and no corner should be left empty.
7.2.3 The stacking site should be flat and compacted, and the number of stacking layers should not exceed 10. 7.2.4 The supporting position and method of the boards during shipment should be in accordance with the stress conditions of the boards and should be firmly fixed. 7.2.5 The extended steel bars and steel wires reserved at the ends of the boards shall not be bent arbitrarily. 8 Product Certificate
Product certificate should be issued when the board leaves the factory, and the certificate should include the following contents: a.
Certificate number:
Production license number;
Standard drawing and design drawing number adopted;
Manufacturer name, trademark and year and month of production; model, specification and quantity;
Evaluation results of mechanical properties of concrete and main reinforcement; Appearance quality and specification size inspection and evaluation results; Structural performance inspection and evaluation results;
Seal of the inspection department.
Additional Notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of China Building Standard Design Institute, the technical unit responsible for building structural components standards of the Ministry of Construction. This standard is drafted by China Building Standard Design Institute, Beijing No. 1 Building Component Factory, and the Professional Design Institute of the Ministry of Railways. The main drafters of this standard are Zhu Wenji, Huang Qiaoyu, Dong Qin, and Ma Guoqiang. This standard is entrusted to China Building Standard Design Institute for interpretation. W.bzsoso.cOm10 The allowable deviation of the external dimensions and related requirements of the plate shall comply with the provisions of Table 6. Engineering Construction Standard Full Text Information System
Pre-processed parts
Lateral bending
Surface flatness
Center position deviation
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Reserved extension reinforcement length
Slab deadweight
Deviation between the center position of the prestressed tendon in the plate width direction and the specified position Note: ① Item 11 is only used for type testing. ②L is the plate length.
Allowable deviation, mm
+10,-5
The structural performance of the plate including bearing capacity, deflection, crack resistance (or crack width) shall be tested. The results shall comply with the requirements of the design drawings and the provisions of GBJ321.
Test methods
The test items and test methods of various raw materials shall comply with the relevant current national standards. 5.2
2 The inspection and evaluation of concrete strength shall comply with the provisions of GBJ107, and the test methods shall comply with the provisions of GBJ81; 5.3 The test methods of structural performance shall comply with the provisions of Appendix 2 of GBJ321 and the design drawings. The test parameters and inspection indicators are given by the design drawings according to the provisions of Appendix 1 of GBJ321. 5.4 The inspection method of the total value of the prestress actually established by the prestressed tendons shall be measured and checked 1 hour after tensioning using a jack or a tension measuring instrument. 5.5
The appearance quality inspection method shall be carried out in accordance with the provisions of Table 7. Table 7
Any part
Inspection method
Observation, measurement with ruler
W Engineering Construction Standard Full-text Information System
Defects at the end of the plate
Surface defects
Continued Table 7
Main stress-bearing parts
Secondary parts
Longitudinal cracks
Transverse cracks on the plate surface
Cracks at the bottom of the plate
Loose concrete or loose extended main reinforcement
Bottom surface of the plate
Side surface of the plate
Surface defects
Surface stains
5.6 The inspection method for external dimensions and related requirements shall be carried out in accordance with the provisions of Table 8. Table 8
Pre-prepared parts
Lateral bending
Surface flatness
Center position
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Inspection method
Observation or measurement with a hundred-grid
Observation and measurement with a ruler and a scale magnifying glass
Observation, shaking
Testing method
Measure any part parallel to the length direction of the plate with a ruler
Measure any part of the bottom
surface perpendicular to the length direction of the plate with a ruler
Measure any part vertically perpendicular to the long side with a ruler
Measure with a ruler using a wire, use a 2m ruler and a wedge-shaped feeler gauge at the maximum lateral bending, and measure with a ruler|| tt||The maximum gap between ruler and two points on the slab surface
Use ruler to measure the center
line in the longitudinal and transverse directions and take the larger value
Measure with a flat ruler and a steel plate ruler
Measure with a ruler or a steel bar protective layer thickness measurement
Instrument
Measure the difference between the two diagonals on the slab surface with a ruler
W.bzsoso：cOn Engineering Construction Standard Full-text Information System
Continued Table 8
Reserved length of protruding steel bars
Slab deadweight
Deviation of the center position of the prestressed tendons in the slab width direction from the specified position 6 Inspection rules
6.1 Factory inspection
6.1.1 Inspection items
Mainly include the appearance quality, external dimensions and structural performance of steel bars and concrete slabs. Testing method
Measure at both ends of the board with a leveling ruler
Measure at both ends of the board with a ruler
Measure with a weighing instrument
Measure with a ruler
6.1.2 Inspection batch, sampling quantity, inspection and re-inspection rules, etc. Shall comply with the provisions of GBJ321. 6.2 Type inspection
6.2.1 Inspection conditions
Type inspection shall be carried out in any of the following circumstances. a.
When the product is transferred to another factory for production or put into production for the first time for trial production and identification; when the product is stopped for more than half a year and then resumed for production; when there are major changes in design, process and materials that may affect product performance; when there is a major difference between the factory inspection results and the last type inspection; periodic inspection during normal production;
When the superior quality supervision and inspection agency makes an inspection request. 6.2.2 Inspection items
Inspect item by item according to the technical requirements of this standard. 6.2.3 Determine the inspection batch according to the provisions of the inspection conditions. Measure the appearance quality and dimensions piece by piece or randomly sample 5% and no less than 3 pieces in the inspection batch; determine the number of structural performance inspections according to the inspection conditions. Inspection and re-inspection rules shall be carried out in accordance with the provisions of GBJ321. 6.3 Result evaluation
6.3.1 The quality supervision and inspection department of the supplier shall inspect the products in accordance with this standard and relevant standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3
Type inspection results are qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 Marking
The board should be equipped with permanent markings, which include: manufacturer name or trademark;
model;
production date (year, month, day);
inspection pass stamp.
7.2 Stacking and transportation
7.2.1 The boards should be stacked according to the model, quality grade, variety and production date. w.bzsoso:com Engineering Construction Standard Full Text Information System
7.2.2 The supporting position of the boards during stacking should be in accordance with the stress conditions of the boards. Pads should be set at both ends. The pads should be aligned up and down, flat and solid, and no corner should be left empty.
7.2.3 The stacking site should be flat and compacted, and the number of stacking layers should not exceed 10. 7.2.4 The supporting position and method of the boards during shipment should be in accordance with the stress conditions of the boards and should be firmly fixed. 7.2.5 The extended steel bars and steel wires reserved at the ends of the boards shall not be bent arbitrarily. 8 Product Certificate
Product certificate should be issued when the board leaves the factory, and the certificate should include the following contents: a.
Certificate number:
Production license number;
Standard drawing and design drawing number adopted;
Manufacturer name, trademark and year and month of production; model, specification and quantity;
Evaluation results of mechanical properties of concrete and main reinforcement; Appearance quality and specification size inspection and evaluation results; Structural performance inspection and evaluation results;
Seal of the inspection department.
Additional Notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of China Building Standard Design Institute, the technical unit responsible for building structural components standards of the Ministry of Construction. This standard is drafted by China Building Standard Design Institute, Beijing No. 1 Building Component Factory, and the Ministry of Railways Professional Design Institute. The main drafters of this standard are Zhu Wenji, Huang Qiaoyu, Dong Qin, and Ma Guoqiang. This standard is entrusted to China Building Standard Design Institute for interpretation. W.bzsoso.cOm10 The allowable deviation of the external dimensions and related requirements of the plate shall comply with the provisions of Table 6. Engineering Construction Standard Full Text Information System
Pre-processed parts
Lateral bending
Surface flatness
Center position deviation
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Reserved extension reinforcement length
Slab deadweight
Deviation between the center position of the prestressed tendon in the plate width direction and the specified position Note: ① Item 11 is only used for type testing. ②L is the plate length.
Allowable deviation, mm
+10,-5
The structural performance of the plate including bearing capacity, deflection, crack resistance (or crack width) shall be tested. The results shall comply with the requirements of the design drawings and the provisions of GBJ321.
Test methods
The test items and test methods of various raw materials shall comply with the relevant current national standards. 5.2
2 The inspection and evaluation of concrete strength shall comply with the provisions of GBJ107, and the test methods shall comply with the provisions of GBJ81; 5.3 The test methods of structural performance shall comply with the provisions of Appendix 2 of GBJ321 and the design drawings. The test parameters and inspection indicators are given by the design drawings according to the provisions of Appendix 1 of GBJ321. 5.4 The inspection method of the total value of the prestress actually established by the prestressed tendons shall be measured and checked 1 hour after tensioning using a jack or a tension measuring instrument. 5.5
The appearance quality inspection method shall be carried out in accordance with the provisions of Table 7. Table 7
Any part
Inspection method
Observation, measurement with ruler
W Engineering Construction Standard Full-text Information System
Defects at the end of the plate
Surface defects
Continued Table 7
Main stress-bearing parts
Secondary parts
Longitudinal cracks
Transverse cracks on the plate surface
Cracks at the bottom of the plate
Loose concrete or loose extended main reinforcement
Bottom surface of the plate
Side surface of the plate
Surface defects
Surface stains
5.6 The inspection method for external dimensions and related requirements shall be carried out in accordance with the provisions of Table 8. Table 8
Pre-prepared parts
Lateral bending
Surface flatness
Center position
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Inspection method
Observation or measurement with a hundred-grid
Observation and measurement with a ruler and a scale magnifying glass
Observation, shaking
Testing method
Measure any part parallel to the length direction of the plate with a ruler
Measure any part of the bottom
surface perpendicular to the length direction of the plate with a ruler
Measure any part vertically perpendicular to the long side with a ruler
Measure with a ruler using a wire, use a 2m ruler and a wedge-shaped feeler gauge at the maximum lateral bending, and measure with a ruler|| tt||The maximum gap between ruler and two points on the slab surface
Use ruler to measure the center
line in the longitudinal and transverse directions and take the larger value
Measure with a flat ruler and a steel plate ruler
Measure with a ruler or a steel bar protective layer thickness measurement
Instrument
Measure the difference between the two diagonals on the slab surface with a ruler
W.bzsoso：cOn Engineering Construction Standard Full-text Information System
Continued Table 8
Reserved length of protruding steel bars
Slab deadweight
Deviation of the center position of the prestressed tendons in the slab width direction from the specified position 6 Inspection rules
6.1 Factory inspection
6.1.1 Inspection items
Mainly include the appearance quality, external dimensions and structural performance of steel bars and concrete slabs. Testing method
Measure at both ends of the board with a leveling ruler
Measure at both ends of the board with a ruler
Measure with a weighing instrument
Measure with a ruler
6.1.2 Inspection batch, sampling quantity, inspection and re-inspection rules, etc. Shall comply with the provisions of GBJ321. 6.2 Type inspection
6.2.1 Inspection conditions
Type inspection shall be carried out in any of the following circumstances. a.
When the product is transferred to another factory for production or put into production for the first time for trial production and identification; when the product is stopped for more than half a year and then resumed for production; when there are major changes in design, process and materials that may affect product performance; when there is a major difference between the factory inspection results and the last type inspection; periodic inspection during normal production;
When the superior quality supervision and inspection agency makes an inspection request. 6.2.2 Inspection items
Inspect item by item according to the technical requirements of this standard. 6.2.3 Determine the inspection batch according to the provisions of the inspection conditions. Measure the appearance quality and dimensions piece by piece or randomly sample 5% and no less than 3 pieces in the inspection batch; determine the number of structural performance inspections according to the inspection conditions. Inspection and re-inspection rules shall be carried out in accordance with the provisions of GBJ321. 6.3 Result evaluation
6.3.1 The quality supervision and inspection department of the supplier shall inspect the products in accordance with this standard and relevant standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3
Type inspection results are qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 Marking
The board should be equipped with permanent markings, which include: manufacturer name or trademark;
model;
production date (year, month, day);
inspection pass stamp.
7.2 Stacking and transportation
7.2.1 The boards should be stacked according to the model, quality grade, variety and production date. w.bzsoso:com Engineering Construction Standard Full Text Information System
7.2.2 The supporting position of the boards during stacking should be in accordance with the stress conditions of the boards. Pads should be set at both ends. The pads should be aligned up and down, flat and solid, and no corner should be left empty.
7.2.3 The stacking site should be flat and compacted, and the number of stacking layers should not exceed 10. 7.2.4 The supporting position and method of the boards during shipment should be in accordance with the stress conditions of the boards and should be firmly fixed. 7.2.5 The extended steel bars and steel wires reserved at the ends of the boards shall not be bent arbitrarily. 8 Product Certificate
Product certificate should be issued when the board leaves the factory, and the certificate should include the following contents: a.
Certificate number:
Production license number;
Standard drawing and design drawing number adopted;
Manufacturer name, trademark and year and month of production; model, specification and quantity;
Evaluation results of mechanical properties of concrete and main reinforcement; Appearance quality and specification size inspection and evaluation results; Structural performance inspection and evaluation results;
Seal of the inspection department.
Additional Notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of China Building Standard Design Institute, the technical unit responsible for building structural components standards of the Ministry of Construction. This standard is drafted by China Building Standard Design Institute, Beijing No. 1 Building Component Factory, and the Ministry of Railways Professional Design Institute. The main drafters of this standard are Zhu Wenji, Huang Qiaoyu, Dong Qin, and Ma Guoqiang. This standard is entrusted to China Building Standard Design Institute for interpretation. W.bzsoso.cOm5
The inspection method for appearance quality shall be in accordance with the provisions of Table 7. Table 7
Any part
Inspection method
Observation, measurement with ruler
W Engineering Construction Standard Full-text Information System
Defects at the end of the plate
Appearance defects
Continued Table 7
Main stress-bearing parts
Secondary parts
Longitudinal cracks
Transverse cracks on the plate
Cracks at the bottom of the plate
Loose concrete or loose extended main reinforcement
Bottom surface of the plate
Side surface of the plate
Appearance defects
Appearance stains
5.6 The inspection method for appearance dimensions and related requirements shall be in accordance with the provisions of Table 8. Table 8
Pre-prepared parts
Lateral bending
Surface flatness
Center position
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Inspection method
Observation or measurement with a hundred-grid
Observation and measurement with a ruler and a scale magnifying glass
Observation, shaking
Testing method
Measure any part parallel to the length direction of the plate with a ruler
Measure any part of the bottom
surface perpendicular to the length direction of the plate with a ruler
Measure any part vertically perpendicular to the long side with a ruler
Measure with a ruler using a wire, use a 2m ruler and a wedge-shaped feeler gauge at the maximum lateral bending, and measure with a ruler|| tt||The maximum gap between ruler and two points on the slab surface
Use ruler to measure the center
line in the longitudinal and transverse directions and take the larger value
Measure with a flat ruler and a steel plate ruler
Measure with a ruler or a steel bar protective layer thickness measurement
Instrument
Measure the difference between the two diagonals on the slab surface with a ruler
W.bzsoso：cOn Engineering Construction Standard Full-text Information System
Continued Table 8
Reserved length of protruding steel bars
Slab deadweight
Deviation of the center position of the prestressed tendons in the slab width direction from the specified position 6 Inspection rules
6.1 Factory inspection
6.1.1 Inspection items
Mainly include the appearance quality, external dimensions and structural performance of steel bars and concrete slabs. Testing method
Measure at both ends of the board with a leveling ruler
Measure at both ends of the board with a ruler
Measure with a weighing instrument
Measure with a ruler
6.1.2 Inspection batch, sampling quantity, inspection and re-inspection rules, etc. Shall comply with the provisions of GBJ321. 6.2 Type inspection
6.2.1 Inspection conditions
Type inspection shall be carried out in any of the following circumstances. a.
When the product is transferred to another factory for production or put into production for the first time for trial production and identification; when the product is stopped for more than half a year and then resumed for production; when there are major changes in design, process and materials that may affect product performance; when there is a major difference between the factory inspection results and the last type inspection; periodic inspection during normal production;
When the superior quality supervision and inspection agency makes an inspection request. 6.2.2 Inspection items
Inspect item by item according to the technical requirements of this standard. 6.2.3 Determine the inspection batch according to the provisions of the inspection conditions. Measure the appearance quality and dimensions piece by piece or randomly sample 5% and no less than 3 pieces in the inspection batch; determine the number of structural performance inspections according to the inspection conditions. Inspection and re-inspection rules shall be carried out in accordance with the provisions of GBJ321. 6.3 Result evaluation
6.3.1 The quality supervision and inspection department of the supplier shall inspect the products in accordance with this standard and relevant standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3
Type inspection results are qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 Marking
The board should be equipped with permanent markings, which include: manufacturer name or trademark;
model;
production date (year, month, day);
inspection pass stamp.
7.2 Stacking and transportation
7.2.1 The boards should be stacked according to the model, quality grade, variety and production date. w.bzsoso:com Engineering Construction Standard Full Text Information System
7.2.2 The supporting position of the boards during stacking should be in accordance with the stress conditions of the boards. Pads should be set at both ends. The pads should be aligned up and down, flat and solid, and no corner should be left empty.
7.2.3 The stacking site should be flat and compacted, and the number of stacking layers should not exceed 10. 7.2.4 The supporting position and method of the boards during shipment should be in accordance with the stress conditions of the boards and should be firmly fixed. 7.2.5 The extended steel bars and steel wires reserved at the ends of the boards shall not be bent arbitrarily. 8 Product Certificate
Product certificate should be issued when the board leaves the factory, and the certificate should include the following contents: a.
Certificate number:
Production license number;
Standard drawing and design drawing number adopted;
Manufacturer name, trademark and year and month of production; model, specification and quantity;
Evaluation results of mechanical properties of concrete and main reinforcement; Appearance quality and specification size inspection and evaluation results; Structural performance inspection and evaluation results;
Seal of the inspection department.
Additional Notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of China Building Standard Design Institute, the technical unit responsible for building structural components standards of the Ministry of Construction. This standard is drafted by China Building Standard Design Institute, Beijing No. 1 Building Component Factory, and the Ministry of Railways Professional Design Institute. The main drafters of this standard are Zhu Wenji, Huang Qiaoyu, Dong Qin, and Ma Guoqiang. This standard is entrusted to China Building Standard Design Institute for interpretation. W.bzsoso.cOm5
The inspection method for appearance quality shall be in accordance with the provisions of Table 7. Table 7
Any part
Inspection method
Observation, measurement with ruler
W Engineering Construction Standard Full-text Information System
Defects at the end of the plate
Appearance defects
Continued Table 7
Main stress-bearing parts
Secondary parts
Longitudinal cracks
Transverse cracks on the plate
Cracks at the bottom of the plate
Loose concrete or loose extended main reinforcement
Bottom surface of the plate
Side surface of the plate
Appearance defects
Appearance stains
5.6 The inspection method for appearance dimensions and related requirements shall be in accordance with the provisions of Table 8. Table 8
Pre-prepared parts
Lateral bending
Surface flatness
Center position
Flatness with concrete surface
Main reinforcement protection layer thickness
Diagonal difference
Inspection method
Observation or measurement with a hundred-grid
Observation and measurement with a ruler and a scale magnifying glass
Observation, shaking
Testing method
Measure any part parallel to the length direction of the plate with a ruler
Measure any part of the bottom
surface perpendicular to the length direction of the plate with a ruler
Measure any part vertically perpendicular to the long side with a ruler
Measure with a ruler using a wire, use a 2m ruler and a wedge-shaped feeler gauge at the maximum lateral bending, and measure with a ruler|| tt||The maximum gap between ruler and two points on the slab surface
Use ruler to measure the center
line in the longitudinal and transverse directions and take the larger value
Measure with a flat ruler and a steel plate ruler
Measure with a ruler or a steel bar protective layer thickness measurement
Instrument
Measure the difference between the two diagonals on the slab surface with a ruler
W.bzsoso：cOn Engineering Construction Standard Full-text Information System
Continued Table 8
Reserved length of protruding steel bars
Slab deadweight
Deviation of the center position of the prestressed tendons in the slab width direction from the specified position 6 Inspection rules
6.1 Factory inspection
6.1.1 Inspection items
Mainly include the appearance quality, external dimensions and structural performance of steel bars and concrete slabs. Testing method
Measure at both ends of the board with a leveling ruler
Measure at both ends of the board with a ruler
Measure with a weighing instrument
Measure with a ruler
6.1.2 Inspection batch, sampling quantity, inspection and re-inspection rules, etc. Shall comply with the provisions of GBJ321. 6.2 Type inspection
6.2.1 Inspection conditions
Type inspection shall be carried out in any of the following circumstances. a.
When the product is transferred to another factory for production or put into production for the first time for trial production and identification; when the product is stopped for more than half a year and then resumed for production; when there are major changes in design, process and materials that may affect product performance; when there is a major difference between the factory inspection results and the last type inspection; periodic inspection during normal production;
When the superior quality supervision and inspection agency makes an inspection request. 6.2.2 Inspection items
Inspect item by item according to the technical requirements of this standard. 6.2.3 Determine the inspection batch according to the provisions of the inspection conditions. Measure the appearance quality and dimensions piece by piece or randomly sample 5% and no less than 3 pieces in the inspection batch; determine the number of structural performance inspections according to the inspection conditions. Inspection and re-inspection rules shall be carried out in accordance with the provisions of GBJ321. 6.3 Result evaluation
6.3.1 The quality supervision and inspection department of the supplier shall inspect the products in accordance with this standard and relevant standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3
Type inspection results are qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 Marking
The board should be equipped with permanent markings, which include: manufacturer name or trademark;
model;
production date (year, month, day);
inspection pass stamp.
7.2 Stacking and transportation
7.2.1 The boards should be stacked according to the model, quality grade, variety and production date. w.bzsoso:com Engineering Construction Standard Full Text Information System
7.2.2 The supporting position of the boards during stacking should be in accordance with the stress conditions of the boards. Pads should be set at both ends. The pads should be aligned up and down, flat and solid, and no corner should be left empty.
7.2.3 The stacking site should be flat and compacted, and the number of stacking layers should not exceed 10. 7.2.4 The supporting position and method of the boards during shipment should be in accordance with the stress conditions of the boards and should be firmly fixed. 7.2.5 The extended steel bars and steel wires reserved at the ends of the boards shall not be bent arbitrarily. 8 Product Certificate
Product certificate should be issued when the board leaves the factory, and the certificate should include the following contents: a.
Certificate number:
Production license number;
Standard drawing and design drawing number adopted;
Manufacturer name, trademark and year and month of production; model, specification and quantity;
Evaluation results of mechanical properties of concrete and main reinforcement; Appearance quality and specification size inspection and evaluation results; Structural performance inspection and evaluation results;
Seal of the inspection department.
Additional Notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of China Building Standard Design Institute, the technical unit responsible for building structural components standards of the Ministry of Construction. This standard is drafted by China Building Standard Design Institute, Beijing No. 1 Building Component Factory, and the Ministry of Railways Professional Design Institute. The main drafters of this standard are Zhu Wenji, Huang Qiaoyu, Dong Qin, and Ma Guoqiang. This standard is entrusted to China Building Standard Design Institute for interpretation. W.bzsoso.cOm1 The quality supervision and inspection department of the supplier shall inspect the products according to this standard and relevant standards. 6.3.2 The factory inspection and assessment shall comply with the provisions of GBJ321. 6.3.3
The type inspection results are qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 Marking
The board shall be marked with permanent marks, which include: manufacturer's name or trademark;
model;
production date (year, month, day);
inspection pass stamp.
7.2 Stacking and transportation
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. w.bzsoso:com Engineering Construction Standard Full Text Information System
7.2.2 The supporting position of the boards when stacking shall comply with the stress conditions of the boards, and wooden blocks shall be set at both ends. The wooden blocks shall be aligned up and down, and the pads shall be flat and solid, and no corner shall be empty.
7.2.3 The stacking site should be flat and compacted, and the number of stacking layers should not exceed 10. 7.2.4 The support position and method of the board during shipment should be consistent with the stress state of the board and should be firmly fixed. 7.2.5 The reserved extended steel bars and steel wires at the ends of the board shall not be bent arbitrarily. 8 Product certificate
A product certificate should be issued when the board leaves the factory. The certificate should include the following contents: a.
Certificate number:
Production license number;
Standard drawing and design drawing number adopted;
Manufacturer name, trademark and year and month of production; model, specification and quantity;
Evaluation results of mechanical properties of concrete and main reinforcement; Appearance quality and specification size inspection and evaluation results; Structural performance inspection and evaluation results;
Seal of the inspection department.
Additional instructions:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the China Building Standard Design Institute, the technical unit responsible for building structural components standards of the Ministry of Construction. This standard was drafted by the China Building Standard Design Institute, Beijing No. 1 Building Component Factory, and the Ministry of Railways Professional Design Institute. The main drafters of this standard are Zhu Wenji, Huang Qiaoyu, Dong Qin, and Ma Guoqiang. This standard is entrusted to the China Building Standard Design Institute for interpretation.1 The quality supervision and inspection department of the supplier shall inspect the products according to this standard and relevant standards. 6.3.2 The factory inspection and assessment shall comply with the provisions of GBJ321. 6.3.3
The type inspection results are qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 Marking
The board shall be marked with permanent marks, which include: manufacturer's name or trademark;
model;
production date (year, month, day);
inspection pass stamp.
7.2 Stacking and transportation
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. w.bzsoso:com Engineering Construction Standard Full Text Information System
7.2.2 The supporting position of the boards when stacking shall comply with the stress conditions of the boards, and wooden blocks shall be set at both ends. The wooden blocks shall be aligned up and down, and the pads shall be flat and solid, and no corner shall be empty.
7.2.3 The stacking site should be flat and compacted, and the number of stacking layers should not exceed 10. 7.2.4 The support position and method of the board during shipment should be consistent with the stress state of the board and should be firmly fixed. 7.2.5 The reserved extended steel bars and steel wires at the ends of the board shall not be bent arbitrarily. 8 Product certificate
A product certificate should be issued when the board leaves the factory. The certificate should include the following contents: a.
Certificate number:
Production license number;
Standard drawing and design drawing number adopted;
Manufacturer name, trademark and year and month of production; model, specification and quantity;
Evaluation results of mechanical properties of concrete and main reinforcement; Appearance quality and specification size inspection and evaluation results; Structural performance inspection and evaluation results;
Seal of the inspection department.
Additional instructions:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the China Building Standard Design Institute, the technical unit responsible for building structural components standards of the Ministry of Construction. This standard was drafted by the China Building Standard Design Institute, Beijing No. 1 Building Component Factory, and the Ministry of Railways Professional Design Institute. The main drafters of this standard are Zhu Wenji, Huang Qiaoyu, Dong Qin, and Ma Guoqiang. This standard is entrusted to the China Building Standard Design Institute for interpretation.
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