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GB 12987-2008 English PDF

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GB 12987-2008: [GB/T 12987-2008] Concrete hollow floor slab and complete sets for village constructs
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GB 12987: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB 12987-2008English579 Add to Cart 4 days [Need to translate] [GB/T 12987-2008] Concrete hollow floor slab and complete sets for village constructs Valid GB 12987-2008
GB 12987-1997English559 Add to Cart 4 days [Need to translate] Concrete hollow floor slab for rural houses Obsolete GB 12987-1997
GB 12987-1991EnglishRFQ ASK 3 days [Need to translate] Concrete hollow floor slab for rural houses Obsolete GB 12987-1991

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Basic data

Standard ID GB 12987-2008 (GB12987-2008)
Description (Translated English) [GB/T 12987-2008] Concrete hollow floor slab and complete sets for village constructs
Sector / Industry National Standard
Classification of Chinese Standard Q14
Classification of International Standard 91.100.30
Word Count Estimation 22,260
Date of Issue 2008-09-18
Date of Implementation 2009-09-01
Older Standard (superseded by this standard) GB 12987-1997; GB 15230-1994
Quoted Standard GB 175; GB 1499.1; GB 1499.2; GB/T 5223; GB 8076; GB 13788; GB/T 14684; GB/T 14685; GB 50010; GB/T 50081-2002; GB 50119; GB 50164; GB 50204-2002; GBJ 107; JC/T 540; JC/T 624; JGJ 55; JGJ 63; JGJ 95
Regulation (derived from) Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard specifies the hole with concrete panels Rural Development (hereinafter referred to as hole plate) and a supporting member (hereinafter referred to as supporting member) classification, raw materials, technical requirements, test methods, inspection rules, factory certification, labeling, storage and transportation and so on. This standard applies to rural and township construction of housing, offices, classrooms and other school buildings used for floor, roof and ceiling panels and other concrete hole door, window lintels (hereinafter referred to as the lintel), balcony cantilever (less referred balcony beams) and stair treads (hereinafter referred to as treads) and other supporting components.

GB 12987-2008: [GB/T 12987-2008] Concrete hollow floor slab and complete sets for village constructs


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Concrete hollow floor slab and complete sets for village constructs ICS 91.100.30 Q14 National Standards of People's Republic of China Replacing GB 12987-1997, GB 15230-1994 Rural construction hole with concrete panels and supporting member Posted 2008-09-18 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Category 1 4 raw material 9 5 Technical requirements 9 6 Test methods 12 7 Inspection rules 12 8 factory certification 13 9 signs, stacking and transport 13 Appendix A (normative) Test Method balcony mechanical properties of the beam 15 1 hole plate appearance 3 Figure 2 lintel shape 3 Figure 4 3 Balcony Beam shape 4 flat-shaped treads shape 4 Figure 5 L-shaped treads shape 4 Figure A. 1 balcony and load beam support mode, the instrument 15 is arranged Table 1 and Code 2 species Table 2 Level 2 hole plate Table 3 balconies and treads Beam Load Level 2 Table 4 lintel Load Level 2 Table 5 prestressed plate section size and nominal length 5 Table 6 non-prestressed plate section size and nominal length 5 Table 7 lintel section size and length of 5 Table 8 balcony beam section size and length 7 Table 9 treads section size and length 7 Table 10 prestressed plate structure size 8 Table 11 Non-prestressed plate structure size 8 Table 12 hole plate appearance quality and size deviation 10 Table 13 supporting members appearance quality and size deviation 10

Foreword

Chapter 5 of this standard is mandatory, the rest are recommended. This standard replaces GB 12987-1997 "rural housing hole with concrete board" and GB 15230-1994 "concrete supporting rural housing member." The main differences between this standard and GB 12987-1997 and GB 15230-1994 are. Name --- standard was revised to "rural construction with a concrete slab and a supporting member hole"; --- Standards include rural construction with concrete hole plate and rural construction with concrete supporting member; --- Increased introduction; --- Added some normative references; --- Modified tag example; --- Cancel the original standards and classification requirements; --- Increasing the prestressing requirements (5.4) and the contents of the original national standard GB 12987-1997 included in Appendix A; --- Factory inspection items unified concrete strength, size and appearance quality deviation; --- Delivery inspection batch adjusted to GB 50204-2002 consistent quality appearance and size bias is adjusted to the number of test 10; --- Increasing the compressive strength of concrete project determined the frequency of the sample make provisions, and clearly monthly assessment; --- Balcony mechanical properties of the beam test method to modify the standard in Appendix A. Appendix A of this standard is a normative appendix. The standard proposed by China Building Materials Federation. This standard by the National Standardization Technical Committee cement products (SAC/TC197) centralized. This standard is drafted by. Suzhou Institute of concrete cement products, Guangzhou City Construction Construction Machinery Co., Ltd. Participated in the drafting of this standard. Shanghai Research Institute of Building Sciences, Wenxian County, Henan Construction Quality Supervision Station, Rugao City Southern Concrete Products Companies, large cement works County, Hanjiang Hang Set precast plant construction and installation company, Suzhou City, the first plant water conservancy member, Rugao Orient Cement Pipe Factory, Yixing City, building materials industry, Suzhou City Hengtang precast plant, cement works Xinghua City border town. The main drafters of this standard. On Yongquan, Xu Xiaodong, Ding Chang silver, Xiancong Ying, Ye Binbin, Zhuang Qi Cai, Lu Naiding, Chen Weiping, Mahu Chen, Su Hanlin, Zong Guo Quan, Caiting Li, Wang Zuoru, Fu Yongping, Zoubo Jun, Zhang roots, Cao silver treasure. The standard commission Suzhou Institute of concrete cement products responsible for the interpretation. This standard replaces the standards previously issued as follows. --- GB 12987-1991, GB 12987-1997; --- GB 15230-1994.

Introduction

Production and use of rural construction hole with concrete slab and concrete structures, fixtures history for decades, since the beginning of the 1970s, Reinforced concrete hole plate hole prestressed concrete slab, reinforced and prestressed concrete door, window lintels, stair treads, and mixed Balcony concrete beam supporting member is in the countryside, towns built in housing construction has been widely used. In order to regulate rural housing hole with concrete slab And production support member, released in 1991, China's first GB 12987-1991 "rural housing hole with concrete slab," and in 1997 for The revised standard, revised standard GB 12987-1997 "rural housing hole with concrete board"; China issued in 1994 GB 15230-1994 "concrete supporting rural housing member" standard. Rural housing has been released more than a decade with a concrete slab and a supporting member hole standard. Because of the design specifications, standards-based format and other changes have been made, the original standards for content does not meet the requirements, coupled with the two products are rural construction Concrete component product, test items, and so have many of the same judgment, issued a mandate for this country, requires the integration of these two standards Amendments. In urban construction, since the building floors high, strict seismic requirements and other reasons, the concrete hole plate has been used less; but in the Rural Construction, Concrete hole plate and the supporting member due to a reasonable structure, easy installation, low construction costs, construction progress fast and so, still is the most important Building materials. As China's construction technology and raising the level of housing construction commonly used to further improve the seismic design of concrete round And the role of the orifice plate supporting member in the Rural Construction will play more and more. We believe with the national standards of product quality integration amend and enact the implementation of rural construction control board and the hole with concrete supporting member The amount of attention and forcing the production plants around the implementation of the standards authorities, building a harmonious society will have a profound impact, so that Concrete hole plate and the supporting member to better serve new socialist countryside construction. Rural construction hole with concrete panels and supporting member

1 Scope

This standard specifies the rural construction with concrete hole plate (hereinafter referred to as hole plate) and a supporting member (hereinafter referred to as the supporting member) sub Class, raw materials, technical requirements, test methods, inspection rules, factory certification, marking, storage and transportation. This standard applies to rural and township construction of housing, offices, school classrooms and other buildings used as a floor, roof and ceiling like hole Concrete panels and doors, window lintels (hereinafter referred to as lintels), balcony cantilever beam (hereinafter referred to as the balcony beams) and stair treads (hereinafter referred to as treads) And other supporting member.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB 175 Common Portland Cement GB 1499.1 steel reinforced concrete - Part 1. Hot rolled steel GB 1499.2 steel reinforced concrete - Part 2. Hot rolled ribbed bars GB/T 5223 prestressed concrete steel wire GB 8076 concrete admixture GB 13788 cold rolled ribbed bar GB/T 14684 building sand GB/T 14685 building pebbles, gravel GB 50010 Design of Concrete Structures GB/T 50081-2002 ordinary concrete mechanical performance test method standards GB 50119 concrete admixture technical specifications GB 50164 concrete quality control standards Construction quality concrete structures GB 50204-2002 acceptance GB J107 Concrete Strength Inspection and Evaluation Standards JC/T 540 concrete products cold drawn low carbon steel wire JC/T 624 rural housing component quality concrete detection method JGJ55 ordinary concrete mix design procedures JGJ63 concrete water standards JGJ95 cold rolled ribbed bar design concrete structures Category 3 3.1 Varieties Variety and code in Table 1. Table 1 Variety and code Variety Code Hole plate Prestressed concrete hole plate (hereinafter referred to as prestressed plate) NYKB Reinforced concrete hole plate (hereinafter referred to as non-prestressed plate) NGKB Supporting member Lintel Prestressed concrete lintel (hereinafter referred to as prestressed lintels) YGL Reinforced concrete lintel (hereinafter referred to as concrete lintel) GL Balcony Beam YTL Treads Prestressed concrete L-shaped treads (hereinafter referred to as prestressed L plate) YLTB Concrete slab shaped treads (hereinafter referred to as the tablet) PTB Concrete L-shaped treads (hereinafter referred to as L plate) LTB 3.2 level Hole plate normal use of uniformly distributed live load standard value is divided into five levels (see Table 2). Balcony beams and treads respectively different uniform Live load standard value is divided into two levels (see Table 3), an upper lintels bear their weight and wall board passed a uniform load is divided into 6 Levels (see Table 4). Table 2 hole board level unit is kN per square meter Level Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Live load standard value 1.5 2.0 2.5 3.0 3.5 Table 3 balcony beams and treads load level in units of kN per square meter Member species Different levels of uniformly distributed live load level Ⅰ Ⅱ Balcony Beam 2.5 3.5 Treads 1.5 2.0 Table 4 lintel load level units kN per meter Level Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Ⅵ Wall heavy load combination G + 5 G + 10 G + 15 G + 20 G + 25 Note. The table refers to the lintel upper part G 1/3 Net weight across the height of the wall, (5 ~ 25) kN/m refers to the board passed uniformly distributed load. 3.3 Specifications 3.3.1 Outline 3.3.1.1 hole plate shape shown in Figure 1. Millimeters Chou --- plate width; L --- plate length;

1 hole plate appearance

3.3.1.2 lintel shape shown in Figure 2. Millimeters Chou --- lintel width; L --- lintel length; Chou 1 --- L-shaped short side width; Chou 2 --- L-shaped long side width; a) --- rectangular cross-section; b) --- a combination of the two rectangular cross-section; c) --- a combination of two L-shaped cross-section; d) --- pumping rectangular cross-section of the hole. Figure 2 lintel shape 3.3.1.3 balcony beam shape shown in Figure 3. Chou --- balcony beam width; L --- balcony beam length; Balcony beam L1 --- root length;

3 Balcony Beam shape

3.3.1.4 flat-shaped and L-shaped treads treads shape shown in Figure 4 and Figure 5. Chou --- treads wide; L --- treads long. 4 flat-shaped treads shape Chou --- treads wide; L --- treads long; Figure 5 L-shaped treads shape 3.3.2 cross-sectional dimension, nominal length 3.3.2.1 prestressed plate, non-prestressed plate-sectional dimensions, nominal length shall conform to Table 5, Table 6 provides. 3.3.2.2 lintels, beams and balconies treads sectional dimensions, nominal length shall conform to Table 7, Table 8 and 9 as specified in Table. Table 5 prestressed plate section size and nominal length in millimeters Sectional dimension Level of nominal length 490 × 110 590 × 110 Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ 270030003300 340036003800 490 × 120 590 × 120 Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ 300033003400 360038004000 420043004500 490 × 130 590 × 130 Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ 360038004000 420043004500 470048005000 Table 6 non-prestressed plate section size and nominal length in millimeters Sectional dimension Level of nominal length 490 × 110 590 × 110 Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ 270030003300 490 × 130 590 × 130 Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ 270030003300 340036003800 490 × 150 590 × 150 Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ 270030003300 340036003800 Table 7 lintel section size and length in millimeters section Load length L level 180 × 50 240 × 50 370 × 50 Rectangular Ⅰ 1100,1200,1300,1400 180 × 60 240 × 60 370 × 60 rectangle Ⅰ 1100,1200,1300,1400,1500,1600,1700 Ⅱ 1100,1200 Ⅲ 1100 Table 7 (continued) millimeters section Load length L level 180 × 100 240 × 100 370 × 100 rectangle Ⅰ ~ Ⅱ 1200,1300,1400,1500,1700,1900 Ⅲ ~ Ⅳ 1200,1300,1400,1500,1700 Ⅴ ~ Ⅵ 1100,1200,1300,1400 180 × 120 240 × 120 370 × 120 rectangle Ⅰ ~ Ⅱ 1400,1500,1700,1900,2000,2300 Ⅲ 1300,1400,1500,1700,1900,2000 Ⅳ 1100,1200,1300,1400,1500,1700,1900 Ⅴ 1100,1200,1300,1400,1500,1700 Ⅵ 1100,1200,1300,1400,1500 180 × 180 240 × 180 370 × 180 rectangle Two rectangular Two L-shaped Ⅰ 2000,2300,2600,2900,3200,3500 Ⅱ ~ Ⅲ 1900,2000,2300,2600,2900 Ⅳ ~ Ⅴ 1700,1900,2000,2300,2600 Ⅵ 1700,1900,2000 180 × 240 240 × 240 370 × 240 rectangle Two rectangular Two L-shaped Ⅱ ~ Ⅲ 2600,2900,3200,3500 Ⅳ 2300,2600,2900,3200 Ⅴ 2300,2600,2900 Ⅵ 2300,2600 180 × 300 240 × 300 370 × 300 rectangle Two rectangular Two L-shaped Ⅳ ~ Ⅵ 2900,3200,3500 240 × 100 240 × 150 Two L-shaped Ⅰ ~ Ⅳ 1100,1200,1300,1400,1500,1700 Ⅴ ~ Ⅵ 1100,1200,1300,1400 Ⅰ ~ Ⅳ 1500,1700,1900,2000,2100,2300 Ⅴ ~ Ⅵ 1500,1700 240 × 180 Pumping holes  (50 ~ 60) Rectangular Ⅰ ~ Ⅳ 1700,1900,2000 240 × 100 (57) 240 × 160 (102) Prestressed Rectangular Ⅰ ~ Ⅳ 1100,1200,1300,1400,1500,1700 Ⅴ ~ Ⅵ 1500,1700 Ⅰ ~ Ⅳ 1500,1700,1900,2000,2100,2300 Ⅴ ~ Ⅵ 1500,1700,1900 Note. Other designs determined by the design department. Table 8 balcony beam section size and length in millimeters species Sectional dimension level length L1 L Width balcony (Bay size) 240 (220) × 240/120 (150) 2100,2200,2300,2400,2500,2600,2700, 2800,2900 3,000 to 5,000 1400 2900,3000,3100,3200,3300,3400 3000 to 4700 1500 3100,3200,3300,3400,3500 3000-4000 2200,2300,2400,2500,2600,2700,2800, 2900,3000,3100 3,000 to 5,000 1400 2900,3000,3100,3200,3300,3400 3000-4000 1500 3100,3200,3300,3400,3500 3000 to 3600 Single male Beam 240 (220) × 1400 3100,3200,3300,3400 5000 1500 3200,3300,3400,3500,3600 4,000 to 5,000 1400 3100,3200,3300,3400,3500 4200 to 5000 1500 3200,3300,3400,3500,3600 3800 to 5000 240 (220) × 240/120 (150) 240 (220) × 1000 2400,2500,2600,2700,2800,2900,3000 3000-4000 1200 2800,2900,3000,3100 3000 1000 2500,2600,2700,2800,2900,3000,3100 3000 to 3400 1000 2500,2600,2700,2800,2900,3000,3100 4200 to 5000 1200 2800,2900,3000,3100,3200 3300 to 5000 1400 3200,3300,3400,3500,3600,3700 3000 ~ 5000 1500 3400,3500,3600,3700,3800,3900 3000 ~ 5000 2500,2600,2700,2800,2900,3000,3100, 3600 to 5000 1200 2900,3000,3100,3200 3000-5000 1400 3300,3400,3500,3600 3000-5000 1500 3700,3800,3900,4000 3000-5000 Note 1. The brackets 220 are cross-sectional width of non-standard bricks dependent. Note 2. Other specifications need to design determined by the design department. Table 9 treads section size and length in millimeters Category Level Sectional dimension length Flat Ⅰ, Ⅱ 250 ~ 350 40,50 - 1000 ~ 1400 L plate Ⅰ, Ⅱ 240 ~ 320 150 ~ 200 40 1000 ~ 1400 Prestressed L plate Ⅰ, Ⅱ 240 ~ 320 150 ~ 200 35 1000 ~ 1400 Note. Other specifications to be determined by the design department design. 3.3.3 Size of 3.3.3.1 prestressed plate structure size Table 10. Table 10 prestressed plate structure size in millimeters Sectional dimension Hole Holes aperture 490 × 110 5 70 20 20 590 × 110 6 70 20 20 490 × 120 5 (4) 76 (80) 22 22 590 × 120 6 (5) 76 (80) 22 22 490 × 130 5 (4) 76 (80) 25 29 590 × 130 6 (5) 76 (80) 25 29 Note 2. The agreement between can also produce other specifications size of the hole plate. 3.3.3.2 Non-prestressed plate structure size Table 11. Table 11 Non-prestressed plate structure size in millimeters Sectional dimension Hole Holes aperture 490 × 110 5 70 20 20 590 × 110 6 70 20 20 490 × 130 5 76 25 29 590 × 130 6 76 25 29 490 × 150 4 108 20 22 590 × 150 4 108 20 22 Note 2. The agreement between can also produce other specifications size of the hole plate. 3.4 mark Hole plate, supporting member of the lintel and the plate-shaped concrete stepping plate varieties, length × width × height, grade, standard number Choreography. Supporting member balcony Leung varieties, length × width × height balcony beam/tip height, grade, standard number choreography. Supporting member of the L-shaped treads and prestressed concrete L-shaped stepping plate varieties, length × width × height × thickness, grade No, the standard number choreography. Tag example as follows. Nominal length of 3800mm, a nominal width of 500mm, a height of 110mm, Ⅱ grade level farm house with prestressed concrete round Orifice labeled as follows. NYKB 3800 × 500 × 110 Ⅱ GB 12987-2008 A length of 3400mm, width of 240mm, height of balcony beam 240mm, tip height of 150mm, loads of level Ⅰ Balcony beam labeled as follows. YTL 3400 × 240 × 240/150 Ⅰ GB 12987-2008 A length of 1000mm, width of 320mm, a height of 150mm, thickness of 35mm, grade level Ⅰ prestressed L-shaped stepping Board labeled as follows. YLTB 1000 × 320 × 150 × 35 Ⅰ GB 12987-2008

4 raw materials

4.1 Production and hole plate supporting member should adopt the intensity level of not less than 42.5 Common portland cement, its performance should be consistent with GB 175 Provisions. 4.2 fine aggregate shall comply with GB/T 14684 of. 4.3 coarse aggregate crushed stone or gravel should be adopted, its performance should be consistent with the provisions of GB/T 14685, wherein the maximum particle size should not exceed stones Clear distance between two adjacent circular holes, reinforcement spacing should not exceed 3/4, and should comply with the relevant provisions of GB 50204-2002. 4.4 concrete mixing and curing water should comply with the provisions JGJ63. 4.5 concrete admixtures shall comply with the provisions of GB 8076. Prestressed prohibited the use of chlorine or other additives salt corrosion of steel Effect of admixtures. Concrete admixture application shall comply with the provisions of GB 50119. 4.6 The use of admixtures, admixtures shall not adversely affect the product performance, admixture shall comply with the relevant product standard before use It must be tested to verify. 4.7 of prestressed tendons should adopt CRB650 CRB800 or cold-rolled ribbed steel, carbon steel and may also be scored Steel, non-prestressed members should adopt CRB550 cold-rolled ribbed steel, reinforced concrete Hot rolled Ⅰ, Ⅱ grade steel or cold drawn low carbon steel Silk, its performance shall conform to GB 13788, GB T 5223, GB 1499.1, GB 1499.2 540 in the corresponding provisions/and JC/T.

5 Technical requirements

5.1 Production basis Hole plate, supporting member should be the standard provisions and relevant qualified design unit design drawings for production. Member design It should be consistent with GB 50010, the provisions JGJ95. 5.2 construction requirements 5.2.1 the reinforced hole plate (wire) concrete protective layer thickness of not less than 15mm. Hole spacing between tendon moderators should not be less than 15mm, when the cold-rolled ribbed steel reinforcement arranged in a larger number of difficulties, may also have two side by side. The outer end plate reinforcement should break elongation Co-design requirements. 5.2.2 prestressed treads no more than 60mm and a height of over prestressed reinforcement beams protective layer thickness of not less than 15mm, height of Protective layer thickness in reinforcement and lintel beams 60mm balcony of not less than 20mm, the thickness of the protective layer of concrete reinforcement treads should not be small To 10mm. 5.2.3 steel processing, welding, banding and installation should comply with the relevant provisions of GB 50204-2002 and shall comply with the requirements of design drawings. 5.3 prestressing requirements Tension Stress prestressing when 5.3.1 cold-rolled ribbed steel, prestressed steel wire, prestressed steel wire tensioning procedures and examination requirements Value should be consistent with GB 50010 and the relevant provisions of GB 50204-2002. 5.3.2 each production shift in post-tensioning program should complete at least 1h detection of all steel production line of the actual establishment of prestressed flat Mean. This value is designed to test a predetermined deviation should not exceed ± 5%. 5.4 Concrete Strength 5.4.1 Concrete strength grade. prestressed when cold-rolled ribbed steel bars should not be less than C30, when using carbon steel, not low To C40; non-prestressed member not less than C30. Concrete mix design shall comply JGJ55 of concrete compressive strength detection Inspection shall comply with the provisions of GB/T 50081-2002, the quality control of concrete shall comply with the requirements of GB 50164. 5.4.2 When put Zhang tendons, and member of the same curing condition of concrete compressive strength of not less than 75% of the design strength of concrete grade. 5.4.3 28d standard curing conditions for inspection and evaluation of concrete compressive strength shall meet the requirements of GB J107. 5.4.4 hole plate, when the supporting member and the member with the factory condition curing concrete compressive strength of not less than the design value. 5.5 appearance quality and size deviation 5.5.1 hole plate appearance quality and size tolerances shall comply with the provisions in Table 12. Table 12 hole plate appearance quality and dimension deviation in millimeters Sub-category items items Tolerance Qualified Exterior quality

1 exposed tendons allowed

2 Cracks not allowed

3 cellular, Ma surface is not more than 1% on the same side area

4 hole allowed

5 short corner, out of each side of not more than one, length ≤40, width ≤20 6 loose ends length ≤50, width ≤20 7 live not more than one rib per piece, length ≤50 8 projections each tumor is not more than three, highly ≤5 size deviation 9 length + 10-5 Width 10 ± 5 Height 11 ± 5 12 lateral bending ≤L/750 13 surface flatness 2m length of not more than 5 14 reinforcement protection layer thickness + 5-3 15 hole diameter + 3-5 16 diagonal difference ≤10 17 prestressed center displacement ± 3 5.5.2 supporting member appearance quality and size tolerances shall comply with the provisions of Table 13. Table 13 supporting members appearance quality and dimension deviation in millimeters Sub-category items items Tolerance Qualified

1 exposed tendons allowed

2 Cracks not allowed

3 holes allowed

4 chipping off the side of not more than 1 per piece, length ≤40, width ≤20 5 Honeycomb is not more than 3% of the same surface area 6 length + 10-5 7 width ± 5 8 height ± 5 Reinforcement protection Thickness Beam + 10-5 Board + 5-3 10 lateral bending ≤L/750 11 surface flatness 2m length of not more than 7 12 diagonal difference ≤12 13 holes for the displacement of the center of ≤7 NOTE. Diagonal difference only applies to the stepping plates. 5.6 Mechanical Properties Prestressed indicators should include testing the mechanical properties of the bearing capacity, deflection, and crack inspection; non-prestressed mechanical performance test indicators should be Including capacity, deflection and crack width. 5.6.1 Carrying Capacity 5.6.1.1 requires inspection by the design specification of concrete structures, should be conforming to the formula (1) Requirements. γ0u≥γ0 [γu] (1) Where. Γ0u --- Load Bearing Test coefficient found that one of the tables listed in GB 50204-2002 test hallmark 9.3.2 reached the Found with the load bearing capacity of test design value (includes weight) ratio. test load bearing capacity design value according to JC/T 624 Shall be calculated; [Γu] --- Bearing Test coefficient allowable value, according to GB 50204-2002 Table 9.3.2 access; Importance factor γ0 --- structural member supporting member for hole plate and take γ0 = 1. 5.6.1.2 requires carrying capacity in real time with reinforced inspection shall comply with the formula (2) requirements. γ0u≥γ0η [γu] (2) Where. Bearing Test η --- correction factor, ie the ratio of capacity calculation with real value and the design value of internal force reinforcemen...

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