Some standard content:
National Standard of the People's Republic of China
Prestressed concrete ribbed roof slabs
Prestressed concrete ribbed roof slabsSubject content and scope of application
GB16728—1997
This standard specifies the specifications, dimensions, model compilation methods, technical requirements, test methods, inspection rules, marking, stacking and transportation of prestressed concrete ribbed roof slabs (hereinafter referred to as slabs) with waterproof layer and prestressing method, including roof slabs, cornice slabs, panels, and panel cornice slabs.
The above-mentioned slabs specified in this standard refer to slabs with waterproof layer and prestressed concrete slabs by prestressing method, and the specifications and dimensions of the roof slabs are mainly 1.5m×6.0m. Similar slabs of other specifications and dimensions may also be adopted for reference. For slabs used in corrosive environments, with surface temperatures higher than 100℃ or with production heat sources and surface temperatures often higher than 60℃, high humidity environments, and environments with large vibration equipment, they should comply with the relevant provisions of the current relevant national standards and specifications. 2 Reference standards
GB81 Test method for mechanical properties of ordinary concrete GB175 Portland cement, ordinary Portland cement GB700
Carbon structural steel
GB1344
Slag Portland cement, pozzolanic Portland cement and fly ash Portland cement GB1499 Hot-rolled ribbed steel bars for reinforced concrete Hot-rolled plain round bars for reinforced concrete
GB 13013
GB 50204
Specifications for construction and acceptance of reinforced concrete projectsJGJ52Quality standards and test methods for sand used in ordinary concreteJGJ53
Quality standards and test methods for crushed stone or pebbles used in ordinary concreteJGJ56Quality standards and test methods for concrete water reducersJGJ63 Standard for water used in concrete mixing
GBJ107Concrete strength inspection and assessment standardsGBJ119Technical specifications for application of concrete admixturesQuality inspection and assessment standards for precast concrete componentsGBJ321
3Specifications, dimensions and numbering methods
3.1The main specifications and dimensions of the slabs shall be as specified in Table 1. Approved by the State Bureau of Technical Supervision on 199701-19
Implementation on 1997-08-01
Roof panel
Eaves panel
Panel eaves panel
GB16728-1997
Marking length
Marking width
Longitudinal rib height
Panel thickness
The model of the plate consists of the name, load level, main reinforcement type, seismic fortification intensity and roof location, and is expressed as follows: 3.2
3.3 Model example
Roof location
Seismic fortification intensity||tt ||Main reinforcement type
Load level
Only for eaves board
Prestressed concrete roof panel code
Roof location
Seismic fortification intensity
Main reinforcement type
Load level
Only for inlay eaves board
Prestressed concrete inlay
The load level is 2, the main reinforcement type is grade II deformed steel bar, the seismic fortification intensity is 8 degrees, and the model of the prestressed concrete roof panel located at the expansion joint of the factory building is:
Prestressed concrete roof panel Y-WB-2.8sGB16728-1997b. The load level is 2, the main reinforcement type is grade I deformed steel bar, and the seismic fortification intensity is 8 degrees. The model of the prestressed concrete cornice slab is:
Prestressed concrete cornice slab Y-WBT—2.8GB16728—1997 The load level is 1, the main reinforcement type is grade II deformed steel bar, and the seismic fortification intensity is 8 degrees. The model of the prestressed concrete panel located at the end of the factory building is:
Prestressed concrete panel Y-KWB--1.8s GB16728—-199775
GB167281997
d. The model of the prestressed concrete panel cornice board with load level 1, main reinforcement type III deformed steel bar and seismic fortification intensity 8 is:
Prestressed concrete panel cornice board Y-KWBT-118GB16728-19973.4 The difference between the length and width of the board and the marked length and width is 30mm and 10mm respectively. 3.5 The dimensions of the plane, surface and cross-section of the board shall comply with the provisions of Figures 1 to 4. 21
R0～105
R0～10
/RO~10
roof panel
R0—20
R0-105
RO—20
20 /20 | —2
Figure 4 Panel eaves board
3.6 Holes are allowed to be opened in the roof panel in the grids formed by the longitudinal and transverse ribs, and holes are allowed to be opened in four grids at the same time. The panel in the hole area needs to be thickened. The hole form, size and thickening size should comply with the requirements of Table 2, see Figure 5. Table 2
Opening form
Square
Diameter
Opening size
Side length a
3001100
300~1 100
Thickening size
Diameter+400
Side length+400
Thickening width (+400)
4 Technical requirements
GB16728-1997
Figure 5 Opening plate
Thickening width (a+100)
=300～1100
4.1 The design and production of plates shall not only comply with the provisions of this standard, but also comply with the requirements of the relevant national standards and design drawings currently in force. 4.2 Materials
4.2.1 Concrete
4.2.1.1 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 may be cold-drawn II, I and N grade deformed steel bars, and their materials and properties shall comply with the provisions of GB1499 and GB50204 respectively. Other types of prestressed steel bars that meet national standards may also be used. 4.2.2.2 Non-prestressed bars should be cold-drawn low-carbon steel wires of grade B and grade I steel bars, and their materials and properties shall comply with the provisions of GB13013 and GB50204 respectively.
4.2.2.3 The lifting ring shall be made of Grade I hot-rolled steel bars that have not been cold-drawn; the embedded steel plate shall be made of Q235-B·F, and its material shall comply with the provisions of GB700 and GB13013 respectively.
4.2.2.4 Welding rod: When welding Grade I steel bars with Grade J steel bars or Grade I steel bars with Q235-B·F, E43×× type welding rod shall be used; when welding Grade I steel bars with Q235-B·F, E50×× type welding rod shall be used, and the material of the welding rod shall comply with the provisions of the current relevant standards. 4.2.2.5 Steel bars, steel wires and embedded steel materials shall have factory quality certificates and factory test reports, and shall be stored strictly according to steel grades and specifications, and shall not be mixed, and shall be prevented from pollution and magic corrosion. 4.3 Concrete strength
4.3.1 Concrete strength grade shall not be lower than C304.3.2 Concrete strength when prestressing tendons are released must meet the design requirements; when there is no clear design requirement, it shall not be lower than 75% of the designed concrete strength standard value.
4.4 Construction requirements
4.4.1 The protective layer of the longitudinal rib main reinforcement shall not be less than 20mm, and the protective layer of the transverse rib and panel reinforcement shall not be less than 10mm. 4.5 The location and number of longitudinal rib main reinforcement joints shall comply with the relevant provisions of GB50204, GBJ321 and the requirements of the design drawings. 4.6 Technical requirements for applying prestress
4.6.1 The tension control stress of the prestressed tendons shall meet the design requirements. The percentage of deviation between the actual total prestress of the prestressed tendons and the inspection specified value shall not exceed ±5%.
4.7 The production process of the board shall comply with the relevant provisions of GB50204 and GBJ321. 4.7.1 The steel bars shall be correctly set according to the design drawings and measures shall be taken to prevent contamination of the isolation agent. 80
4.8 The appearance quality of the board shall comply with the requirements of Table 3. Item No.
Any part
Main stress-bearing part
Secondary part
Longitudinal cracks on the board
Transverse cracks on the board
Appearance defects
Appearance defects
Appearance stains
GB 16728-1997
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 each part not exceeding 0.01 m2The width of the seam is not more than 0.15mm, and the total length of the seam is not more than 1./4. The length of the seam at the overhanging eaves should not exceed 1/2 of the board width, and should not extend to the side. The seam width is not more than 0.15mm. There should be no
Only one corner crack is allowed, and it should not extend to the board surface. There should be no
There should be no
There should be no
Note: ① Exposed reinforcement refers to the defect that the steel bars in the board are not wrapped by concrete and exposed. ② Holes refer to holes in the concrete whose depth and length exceed the thickness of the protective layer. ③ Honeycombs refer to the defect that the concrete surface of the board lacks cement mortar and forms exposed stones. ④ Cracks refer to gaps extending into the concrete. ③ External defects refer to the board ends that are not straight, tilted, missing edges and corners, flashing and convex rib scars. ③ Surface defects refer to the board surface roughness, peeling, sanding and smearing. ③ Surface contamination refers to the surface of the component with oil or sticky debris. 4.9 For defects that do not exceed the honeycomb specified in Table 3 and do not affect the structural performance and installation 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 relevant items of the board shall comply with the provisions of Table 4. Table 4
Embedded parts
Panel thickness
Lateral bending
Surface smoothness
Center position deviation
Flatness with concrete surface
Allowable deviation, mmwwW.bzxz.Net
+10,-5
Note: L is the board length.
Reserved holes
GB16728-1997
Table 4 (end)
Center position offset
Specification size
Main reinforcement protection layer thickness
Diagonal difference
Allowable deviation, mm
The structural performance of the plate including bearing capacity, deflection, crack resistance (or crack width) should be tested. The results should meet the requirements of the design drawings and the provisions of GBJ321.
5 Test methods
The test items and test methods of various raw materials and steel welding quality should meet the relevant national standards in force. 5.1
5.2 The inspection and evaluation of concrete strength should meet the provisions of GBJ107, and the test methods should meet the provisions of GBJ81. 5.3 The test methods of structural performance should meet the provisions of Appendix 2 of GBJ321 and the design drawings. The test parameters and inspection indicators shall comply with the requirements of the design drawings or the provisions of Appendix 1 of GBJ321. 5.4 The inspection of the total value of the prestress actually established by the prestressed tendons shall be measured and inspected 1 hour after tensioning. 5.5 The inspection method for appearance quality shall comply with the provisions of Table 5, Table 5
Any part
Main stress-bearing part
Secondary part
Longitudinal cracks on the board
Transverse cracks on the board
Surface contamination
Surface defects
Appearance defects
Appearance dimensions and other related items shall comply with the provisions of Table 6. Table 6
Inspection method
Observation, measurement with ruler
Observation or measurement with a hundred-grid
Observation and measurement with ruler, scale magnifying glass
Testing method
Measure with ruler the two ends of the bottom of the longitudinal rib parallel to the length of the boardMeasure with ruler any part of the outer side of the two longitudinal ribs perpendicular to the length of the boardMeasure with ruler any part from the bottom of the longitudinal rib perpendicular to the panel to the panel surfaceItem number
6 Inspection rules
Embedded parts
Reserved holes
6.1 Factory inspection
6.1.1 Inspection items
Panel thickness
Lateral deflection
Surface flatness
GB 16728—1997
Table 6 (end)
Testing method
Measure with a rulerVertical direction perpendicular to the panelMeasure with a rulerAny part of the panelMeasure with a ruler
Measure with a ruler
Pull a wire and measure the maximum lateral bending with a ruler
Use a 2m ruler and a wedge-shaped feeler gauge to measure the maximum gap between the ruler and two points on the panelCenter position deviation
Flatness with concrete surface
Center position deviation
Specifications and dimensions
Main reinforcement Protective layer thickness
Diagonal difference
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a flat ruler and a steel plate ruler
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a ruler
Measure with a ruler or a steel bar protective layer thickness measuring instrumentMeasure the difference between the two diagonals of the board surface with a ruler
Measure at both ends of the board with a leveling ruler
Mainly includes steel bar material, concrete strength, appearance quality, external dimensions and structural performance of the board. 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 test shall be carried out in any of the following cases: 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, which may affect product performance; when there is a big difference between the factory inspection result 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 GBJ321. Measure the appearance quality and external dimensions piece by piece or randomly sample 5% and not less than 3 pieces according to the inspection batch; determine the number of structural performance inspections according to GBJ321. The 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 board according to this standard and related standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3 The type inspection results shall be qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 The board shall be marked with permanent markings, including: 83
Manufacturer name or trademark;
Model;
Production date (year, month, day);
Inspection pass stamp.
7.2 Stacking and transportation
GB16728—1997
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. 7.2.2 The stacking site should be flat and solid. When stacking, a certain gap should be left between the board and the ground, and drainage measures should be taken. The number of stacking layers should meet the requirements of the design drawings.
7.2.3 The supporting position of the board when stacking should meet its stress conditions. Pads should be set at both ends. The height of the pads should be consistent. The position of the pads from the board ends should meet the requirements of the design drawings, and they should be aligned up and down, flat and solid. 7.2.4 The supporting position and method of the board during shipment should meet its stress conditions and be firmly fixed. 8 Product Certificate
A product certificate shall be issued when the board leaves the factory, and the certificate shall 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 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 (chief editor) and Beijing No. 1 Building Component Factory. The main drafters are Zhou Qiaoxian, Zhu Zhixin, Luo Chunjiao, Huang Qiaoyu and Xiang Bao. This standard is entrusted to the China Building Standard Design Institute for interpretation. 8.1/4, the eaves should not have a length not exceeding 1/2 of the board width, and should not extend to the side. The seam width should not exceed 0.15mm. There should be no
Only one corner crack is allowed, and it should not extend to the board surface. There should be no
No
No
Note: ① Exposed reinforcement refers to the defect that the steel bars in the board are not wrapped by concrete and are exposed. ② Holes refer to holes in the concrete whose depth and length exceed the thickness of the protective layer. ③ Honeycombs refer to the defect that the concrete surface of the board lacks cement mortar and forms exposed stones. ④ Cracks refer to gaps extending into the concrete. ③ Shape defects refer to the board ends that are not straight, tilted, missing edges and corners, flashing and protruding ribs. ③ Surface defects refer to the rough surface, peeling, sanding and smearing of the board surface. ③ Surface stains refer to oil or sticky debris on the surface of the component. 4.9 For honeycombs that do not exceed the requirements of Table 3 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 deviations of the relevant items of the board shall comply with the provisions of Table 4. Table 4
Embedded parts
Panel thickness
Lateral bending
Surface smoothness
Center position deviation
Flatness with concrete surface
Allowable deviation, mm
+10,-5
Note: L is the length of the board.
Reserved holes
GB16728-1997
Table 4 (end)
Center position deviation
Specification size
Main reinforcement protection layer thickness
Diagonal difference
Allowable deviation, mm
The structural performance of the board including bearing capacity, deflection, crack resistance (or crack width) shall be inspected. The results shall comply with the requirements of the design drawings and the provisions of GBJ321.
5 Test methods
The test items and test methods for various raw materials and steel welding quality shall comply with the relevant national standards in force. 5.1
5.2 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 for structural performance shall comply with the provisions of Appendix II of GBJ321 and the design drawings. The test parameters and inspection indicators shall comply with the requirements of the design drawings or the provisions of Appendix I of GBJ321. 5.4 The inspection of the total value of the prestress actually established by the prestressed tendons shall be measured and checked 1h after tensioning. 5.5 The inspection method for appearance quality shall comply with the provisions of Table 5. Table 5
Any part
Main stress-bearing part
Secondary part
Longitudinal cracks on the board
Horizontal cracks on the board
Surface stains
Surface defects
Appearance defects
Appearance dimensions and other relevant items shall be inspected in accordance with the provisions of Table 6. Table 6
Inspection method
Observation, measurement with ruler
Observation or measurement with a hundred-grid
Observation and measurement with ruler, scale magnifying glass
Testing method
Measure with ruler the two ends of the bottom of the longitudinal rib parallel to the length of the boardMeasure with ruler any part of the outer side of the two longitudinal ribs perpendicular to the length of the boardMeasure with ruler any part from the bottom of the longitudinal rib perpendicular to the panel to the panel surfaceItem number
6 Inspection rules
Embedded parts
Reserved holes
6.1 Factory inspection
6.1.1 Inspection items
Panel thickness
Lateral deflection
Surface flatness
GB 16728—1997
Table 6 (end)
Testing method
Measure with a rulerVertical direction perpendicular to the panelMeasure with a rulerAny part of the panelMeasure with a ruler
Measure with a ruler
Pull a wire and measure the maximum lateral bending with a ruler
Use a 2m ruler and a wedge-shaped feeler gauge to measure the maximum gap between the ruler and two points on the panelCenter position deviation
Flatness with concrete surface
Center position deviation
Specifications and dimensions
Main reinforcement Protective layer thickness
Diagonal difference
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a flat ruler and a steel plate ruler
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a ruler
Measure with a ruler or a steel bar protective layer thickness measuring instrumentMeasure the difference between the two diagonals of the board surface with a ruler
Measure at both ends of the board with a leveling ruler
Mainly includes steel bar material, concrete strength, appearance quality, external dimensions and structural performance of the board. 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 test shall be carried out in any of the following cases: 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, which may affect product performance; when there is a big difference between the factory inspection result 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 GBJ321. Measure the appearance quality and external dimensions piece by piece or randomly sample 5% and not less than 3 pieces according to the inspection batch; determine the number of structural performance inspections according to GBJ321. The 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 board according to this standard and related standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3 The type inspection results shall be qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 The board shall be marked with permanent markings, including: 83
Manufacturer name or trademark;
Model;
Production date (year, month, day);
Inspection pass stamp.
7.2 Stacking and transportation
GB16728—1997
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. 7.2.2 The stacking site should be flat and solid. When stacking, a certain gap should be left between the board and the ground, and drainage measures should be taken. The number of stacking layers should meet the requirements of the design drawings.
7.2.3 The supporting position of the board when stacking should meet its stress conditions. Pads should be set at both ends. The height of the pads should be consistent. The position of the pads from the board ends should meet the requirements of the design drawings, and they should be aligned up and down, flat and solid. 7.2.4 The supporting position and method of the board during shipment should meet its stress conditions and be firmly fixed. 8 Product Certificate
A product certificate shall be issued when the board leaves the factory, and the certificate shall 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 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 (chief editor) and Beijing No. 1 Building Component Factory. The main drafters are Zhou Qiaoxian, Zhu Zhixin, Luo Chunjiao, Huang Qiaoyu and Xiang Bao. This standard is entrusted to the China Building Standard Design Institute for interpretation. 8.1/4, the eaves should not have a length not exceeding 1/2 of the board width, and should not extend to the side. The seam width should not exceed 0.15mm. There should be no
Only one corner crack is allowed, and it should not extend to the board surface. There should be no
No
No
Note: ① Exposed reinforcement refers to the defect that the steel bars in the board are not wrapped by concrete and are exposed. ② Holes refer to holes in the concrete whose depth and length exceed the thickness of the protective layer. ③ Honeycombs refer to the defect that the concrete surface of the board lacks cement mortar and forms exposed stones. ④ Cracks refer to gaps extending into the concrete. ③ Shape defects refer to the board ends that are not straight, tilted, missing edges and corners, flashing and protruding ribs. ③ Surface defects refer to the rough surface, peeling, sanding and smearing of the board surface. ③ Surface stains refer to oil or sticky debris on the surface of the component. 4.9 For honeycombs that do not exceed the requirements of Table 3 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 deviations of the relevant items of the board shall comply with the provisions of Table 4. Table 4
Embedded parts
Panel thickness
Lateral bending
Surface smoothness
Center position deviation
Flatness with concrete surface
Allowable deviation, mm
+10,-5
Note: L is the length of the board.
Reserved holes
GB16728-1997
Table 4 (end)
Center position deviation
Specification size
Main reinforcement protection layer thickness
Diagonal difference
Allowable deviation, mm
The structural performance of the board including bearing capacity, deflection, crack resistance (or crack width) shall be inspected. The results shall comply with the requirements of the design drawings and the provisions of GBJ321.
5 Test methods
The test items and test methods for various raw materials and steel welding quality shall comply with the relevant national standards in force. 5.1
5.2 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 for structural performance shall comply with the provisions of Appendix II of GBJ321 and the design drawings. The test parameters and inspection indicators shall comply with the requirements of the design drawings or the provisions of Appendix I of GBJ321. 5.4 The inspection of the total value of the prestress actually established by the prestressed tendons shall be measured and checked 1h after tensioning. 5.5 The inspection method for appearance quality shall comply with the provisions of Table 5. Table 5
Any part
Main stress-bearing part
Secondary part
Longitudinal cracks on the board
Horizontal cracks on the board
Surface stains
Surface defects
Appearance defects
Appearance dimensions and other relevant items shall be inspected in accordance with the provisions of Table 6. Table 6
Inspection method
Observation, measurement with ruler
Observation or measurement with a hundred-grid
Observation and measurement with ruler, scale magnifying glass
Testing method
Measure with ruler the two ends of the bottom of the longitudinal rib parallel to the length of the boardMeasure with ruler any part of the outer side of the two longitudinal ribs perpendicular to the length of the boardMeasure with ruler any part from the bottom of the longitudinal rib perpendicular to the panel to the panel surfaceItem number
6 Inspection rules
Embedded parts
Reserved holes
6.1 Factory inspection
6.1.1 Inspection items
Panel thickness
Lateral deflection
Surface flatness
GB 16728—1997
Table 6 (end)
Testing method
Measure with a rulerVertical direction perpendicular to the panelMeasure with a rulerAny part of the panelMeasure with a ruler
Measure with a ruler
Pull a wire and measure the maximum lateral bending with a ruler
Use a 2m ruler and a wedge-shaped feeler gauge to measure the maximum gap between the ruler and two points on the panelCenter position deviation
Flatness with concrete surface
Center position deviation
Specifications and dimensions
Main reinforcement Protective layer thickness
Diagonal difference
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a flat ruler and a steel plate ruler
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a ruler
Measure with a ruler or a steel bar protective layer thickness measuring instrumentMeasure the difference between the two diagonals of the board surface with a ruler
Measure at both ends of the board with a leveling ruler
Mainly includes steel bar material, concrete strength, appearance quality, external dimensions and structural performance of the board. 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 test shall be carried out in any of the following cases: 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, which may affect product performance; when there is a big difference between the factory inspection result 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 GBJ321. Measure the appearance quality and external dimensions piece by piece or randomly sample 5% and not less than 3 pieces according to the inspection batch; determine the number of structural performance inspections according to GBJ321. The 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 board according to this standard and related standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3 The type inspection results shall be qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 The board shall be marked with permanent markings, including: 83
Manufacturer name or trademark;
Model;
Production date (year, month, day);
Inspection pass stamp.
7.2 Stacking and transportation
GB16728—1997
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. 7.2.2 The stacking site should be flat and solid. When stacking, a certain gap should be left between the board and the ground, and drainage measures should be taken. The number of stacking layers should meet the requirements of the design drawings.
7.2.3 The supporting position of the board when stacking should meet its stress conditions. Pads should be set at both ends. The height of the pads should be consistent. The position of the pads from the board ends should meet the requirements of the design drawings, and they should be aligned up and down, flat and solid. 7.2.4 The supporting position and method of the board during shipment should meet its stress conditions and be firmly fixed. 8 Product Certificate
A product certificate shall be issued when the board leaves the factory, and the certificate shall 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 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 (chief editor) and Beijing No. 1 Building Component Factory. The main drafters are Zhou Qiaoxian, Zhu Zhixin, Luo Chunjiao, Huang Qiaoyu and Xiang Bao. This standard is entrusted to the China Building Standard Design Institute for interpretation. 8.1-5
Note: L is the length of the plate.
Prepared holes
GB16728-1997
Table 4 (end)
Center position offset
Specification
Main reinforcement protection layer thickness
Diagonal difference
Allowable deviation, mm
The structural performance of the plate including bearing capacity, deflection, crack resistance (or crack width) should be inspected. The results should meet the requirements of the design drawings and the provisions of GBJ321.
5Test methods
The test items and test methods of various raw materials and steel welding quality should meet the relevant national standards in force. 5.1
5.2The inspection and evaluation of concrete strength should meet the provisions of GBJ107, and the test methods should meet the provisions of GBJ81. 5.3 The test method of structural performance shall comply with the provisions of Appendix II of GBJ321 and the design drawings. The test parameters and inspection indicators shall comply with the requirements of the design drawings or the provisions of Appendix I of GBJ321. 5.4 The inspection of the total value of prestress actually established by the prestressed tendons shall be measured and inspected 1 hour after tensioning. 5.5 The inspection method of appearance quality shall comply with the provisions of Table 5, Table 5
Any part
Main stress-bearing part
Secondary part
Longitudinal cracks on the board
Transverse cracks on the board
Surface contamination
Surface defects
Appearance defects
Appearance dimensions and other related items The inspection methods shall comply with the provisions of Table 6. Table 6
Inspection method
Observation, measurement with ruler
Observation or measurement with a hundred-grid
Observation and measurement with ruler, scale magnifying glass
Testing method
Measure with ruler the two ends of the bottom of the longitudinal rib parallel to the length of the boardMeasure with ruler any part of the outer side of the two longitudinal ribs perpendicular to the length of the boardMeasure with ruler any part from the bottom of the longitudinal rib perpendicular to the panel to the panel surfaceItem number
6 Inspection rules
Embedded parts
Reserved holes
6.1 Factory inspection
6.1.1 Inspection items
Panel thickness
Lateral deflection
Surface flatness
GB 16728—1997
Table 6 (end)
Testing method
Measure with a rulerVertical direction perpendicular to the panelMeasure with a rulerAny part of the panelMeasure with a ruler
Measure with a ruler
Pull a wire and measure the maximum lateral bending with a ruler
Use a 2m ruler and a wedge-shaped feeler gauge to measure the maximum gap between the ruler and two points on the panelCenter position deviation
Flatness with concrete surface
Center position deviation
Specifications and dimensions
Main reinforcement Protective layer thickness
Diagonal difference
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a flat ruler and a steel plate ruler
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a ruler
Measure with a ruler or a steel bar protective layer thickness measuring instrumentMeasure the difference between the two diagonals of the board surface with a ruler
Measure at both ends of the board with a leveling ruler
Mainly includes steel bar material, concrete strength, appearance quality, external dimensions and structural performance of the board. 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 test shall be carried out in any of the following cases: 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, which may affect product performance; when there is a big difference between the factory inspection result 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 GBJ321. Measure the appearance quality and external dimensions piece by piece or randomly sample 5% and not less than 3 pieces according to the inspection batch; determine the number of structural performance inspections according to GBJ321. The 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 board according to this standard and related standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3 The type inspection results shall be qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 The board shall be marked with permanent markings, including: 83
Manufacturer name or trademark;
Model;
Production date (year, month, day);
Inspection pass stamp.
7.2 Stacking and transportation
GB16728—1997
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. 7.2.2 The stacking site should be flat and solid. When stacking, a certain gap should be left between the board and the ground, and drainage measures should be taken. The number of stacking layers should meet the requirements of the design drawings.
7.2.3 The supporting position of the board when stacking should meet its stress conditions. Pads should be set at both ends. The height of the pads should be consistent. The position of the pads from the board ends should meet the requirements of the design drawings, and they should be aligned up and down, flat and solid. 7.2.4 The supporting position and method of the board during shipment should meet its stress conditions and be firmly fixed. 8 Product Certificate
A product certificate shall be issued when the board leaves the factory, and the certificate shall 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 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 (chief editor) and Beijing No. 1 Building Component Factory. The main drafters are Zhou Qiaoxian, Zhu Zhixin, Luo Chunjiao, Huang Qiaoyu and Xiang Bao. This standard is entrusted to the China Building Standard Design Institute for interpretation. 8.1-5
Note: L is the length of the plate.
Prepared holes
GB16728-1997
Table 4 (end)
Center position offset
Specification
Main reinforcement protection layer thickness
Diagonal difference
Allowable deviation, mm
The structural performance of the plate including bearing capacity, deflection, crack resistance (or crack width) should be inspected. The results should meet the requirements of the design drawings and the provisions of GBJ321.
5Test methods
The test items and test methods of various raw materials and steel welding quality should meet the relevant national standards in force. 5.1
5.2The inspection and evaluation of concrete strength should meet the provisions of GBJ107, and the test methods should meet the provisions of GBJ81. 5.3 The test method of structural performance shall comply with the provisions of Appendix II of GBJ321 and the design drawings. The test parameters and inspection indicators shall comply with the requirements of the design drawings or the provisions of Appendix I of GBJ321. 5.4 The inspection of the total value of prestress actually established by the prestressed tendons shall be measured and inspected 1 hour after tensioning. 5.5 The inspection method of appearance quality shall comply with the provisions of Table 5, Table 5
Any part
Main stress-bearing part
Secondary part
Longitudinal cracks on the board
Transverse cracks on the board
Surface contamination
Surface defects
Appearance defects
Appearance dimensions and other related items The inspection methods shall comply with the provisions of Table 6. Table 6
Inspection method
Observation, measurement with ruler
Observation or measurement with a hundred-grid
Observation and measurement with ruler, scale magnifying glass
Testing method
Measure with ruler the two ends of the bottom of the longitudinal rib parallel to the length of the boardMeasure with ruler any part of the outer side of the two longitudinal ribs perpendicular to the length of the boardMeasure with ruler any part from the bottom of the longitudinal rib perpendicular to the panel to the panel surfaceItem number
6 Inspection rules
Embedded parts
Reserved holes
6.1 Factory inspection
6.1.1 Inspection items
Panel thickness
Lateral deflection
Surface flatness
GB 16728—1997
Table 6 (end)
Testing method
Measure with a rulerVertical direction perpendicular to the panelMeasure with a rulerAny part of the panelMeasure with a ruler
Measure with a ruler
Pull a wire and measure the maximum lateral bending with a ruler
Use a 2m ruler and a wedge-shaped feeler gauge to measure the maximum gap between the ruler and two points on the panelCenter position deviation
Flatness with concrete surface
Center position deviation
Specifications and dimensions
Main reinforcement Protective layer thickness
Diagonal difference
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a flat ruler and a steel plate ruler
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a ruler
Measure with a ruler or a steel bar protective layer thickness measuring instrumentMeasure the difference between the two diagonals of the board surface with a ruler
Measure at both ends of the board with a leveling ruler
Mainly includes steel bar material, concrete strength, appearance quality, external dimensions and structural performance of the board. 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 test shall be carried out in any of the following cases: 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, which may affect product performance; when there is a big difference between the factory inspection result 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 GBJ321. Measure the appearance quality and external dimensions piece by piece or randomly sample 5% and not less than 3 pieces according to the inspection batch; determine the number of structural performance inspections according to GBJ321. The 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 board according to this standard and related standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3 The type inspection results shall be qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 The board shall be marked with permanent markings, including: 83
Manufacturer name or trademark;
Model;
Production date (year, month, day);
Inspection pass stamp.
7.2 Stacking and transportation
GB16728—1997
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. 7.2.2 The stacking site should be flat and solid. When stacking, a certain gap should be left between the board and the ground, and drainage measures should be taken. The number of stacking layers should meet the requirements of the design drawings.
7.2.3 The supporting position of the board when stacking should meet its stress conditions. Pads should be set at both ends. The height of the pads should be consistent. The position of the pads from the board ends should meet the requirements of the design drawings, and they should be aligned up and down, flat and solid. 7.2.4 The supporting position and method of the board during shipment should meet its stress conditions and be firmly fixed. 8 Product Certificate
A product certificate shall be issued when the board leaves the factory, and the certificate shall 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 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 (chief editor) and Beijing No. 1 Building Component Factory. The main drafters are Zhou Qiaoxian, Zhu Zhixin, Luo Chunjiao, Huang Qiaoyu and Xiang Bao. This standard is entrusted to the China Building Standard Design Institute for interpretation. 8.11 Inspection items
Panel thickness
Lateral deflection
Surface flatness
GB 16728—1997
Table 6 (end)
Testing method
Measure with a rulerVertical direction perpendicular to the panelMeasure with a rulerAny part of the panel measured with a ruler
Measure with a ruler
Measure the maximum lateral deflection with a ruler
Use a 2m ruler and a wedge-shaped feeler gauge to measure the maximum gap between the ruler and two points on the panelCenter position deviation
Smoothness with concrete surface
Center position deviation
Specifications and dimensions
Main reinforcement Protective layer thickness
Diagonal difference
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a flat ruler and a steel plate ruler
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a ruler
Measure with a ruler or a steel bar protective layer thickness measuring instrumentMeasure the difference between the two diagonals of the board surface with a ruler
Measure at both ends of the board with a leveling ruler
Mainly includes steel bar material, concrete strength, appearance quality, external dimensions and structural performance of the board. 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 test shall be carried out in any of the following cases: 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, which may affect product performance; when there is a big difference between the factory inspection result 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 GBJ321. Measure the appearance quality and external dimensions piece by piece or randomly sample 5% and not less than 3 pieces according to the inspection batch; determine the number of structural performance inspections according to GBJ321. The 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 board according to this standard and related standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3 The type inspection results shall be qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 The board shall be marked with permanent markings, including: 83
Manufacturer name or trademark;
Model;
Production date (year, month, day);
Inspection pass stamp.
7.2 Stacking and transportation
GB16728—1997
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. 7.2.2 The stacking site should be flat and solid. When stacking, a certain gap should be left between the board and the ground, and drainage measures should be taken. The number of stacking layers should meet the requirements of the design drawings.
7.2.3 The supporting position of the board when stacking should meet its stress conditions. Pads should be set at both ends. The height of the pads should be consistent. The position of the pads from the board ends should meet the requirements of the design drawings, and they should be aligned up and down, flat and solid. 7.2.4 The supporting position and method of the board during shipment should meet its stress conditions and be firmly fixed. 8 Product Certificate
A product certificate shall be issued when the board leaves the factory, and the certificate shall 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 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 (chief editor) and Beijing No. 1 Building Component Factory. The main drafters are Zhou Qiaoxian, Zhu Zhixin, Luo Chunjiao, Huang Qiaoyu and Xiang Bao. This standard is entrusted to the China Building Standard Design Institute for interpretation. 8.11 Inspection items
Panel thickness
Lateral deflection
Surface flatness
GB 16728—1997
Table 6 (end)
Testing method
Measure with a rulerVertical direction perpendicular to the panelMeasure with a rulerAny part of the panel measured with a ruler
Measure with a ruler
Measure the maximum lateral deflection with a ruler
Use a 2m ruler and a wedge-shaped feeler gauge to measure the maximum gap between the ruler and two points on the panelCenter position deviation
Smoothness with concrete surface
Center position deviation
Specifications and dimensions
Main reinforcement Protective layer thickness
Diagonal difference
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a flat ruler and a steel plate ruler
Measure the center line in the longitudinal and transverse directions with a ruler, and take the larger value with a ruler
Measure with a ruler or a steel bar protective layer thickness measuring instrumentMeasure the difference between the two diagonals of the board surface with a ruler
Measure at both ends of the board with a leveling ruler
Mainly includes steel bar material, concrete strength, appearance quality, external dimensions and structural performance of the board. 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 test shall be carried out in any of the following cases: 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, which may affect product performance; when there is a big difference between the factory inspection result 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 GBJ321. Measure the appearance quality and external dimensions piece by piece or randomly sample 5% and not less than 3 pieces according to the inspection batch; determine the number of structural performance inspections according to GBJ321. The 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 board according to this standard and related standards. 6.3.2 The factory inspection and evaluation shall comply with the provisions of GBJ321. 6.3.3 The type inspection results shall be qualified when they meet the technical requirements of this standard. 7 Marking, stacking and transportation
7.1 The board shall be marked with permanent markings, including: 83
Manufacturer name or trademark;
Model;
Production date (year, month, day);
Inspection pass stamp.
7.2 Stacking and transportation
GB16728—1997
7.2.1 The boards shall be stacked according to model, quality grade, variety and production date. 7.2.2 The stacking site should be flat and solid. When stacking, a certain gap should be left between the board and the ground, and drainage measures should be taken. The number of stacking layers should meet the requirements of the design drawings.
7.2.3 The supporting position of the board when stacking should meet its stress conditions. Pads should be set at both ends. The height of the pads should be consistent. The position of the pads from the board ends should meet the requirements of the design drawings, and they should be aligned up and down, flat and solid. 7.2.4 The supporting position and method of the board during shipment should meet its stress conditions and be firmly fixed. 8 Product Certificate
A product certificate shall be issued when the board leaves the factory, and the certificate shall 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 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 (chief editor) and Beijing No. 1 Building Component Factory. The main drafters are Zhou Qiaoxian, Zhu Zhixin, Luo Chunjiao, Huang Qiaoyu and Xiang Bao. This standard is entrusted to the China Building Standard Design Institute for interpretation. 8.1
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