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GB 50345-2012: Technical code for roof engineering Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB 50345: Historical versions
Similar standardsGB 50345-2012: Technical code for roof engineering---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50345-2012NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA P GB 50345-2012 Technical Code for Roof Engineering Issued on. May 28, 2012 Implement on. October 1, 2012 Jointly issued by the Ministry of Housing and Urban-Rural Development (MOHURD) and the General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) of the People's Republic of China Ministry of Housing and Urban-Rural Development (MOHURD) Announcement No.1395 Announcement on Issuring the National Standard "Technical Code for Roof Engineering" "Technical Code for Roof Engineering" has been approved as a national standard with a serial number of GB 50345-2012, and it shall be implemented on October 1, 2012. Thereinto, aritcles 3.0.5, 4.5.1, 4.5.5, 4.5.6, 4.5.7, 4.8.1, 4.9.1 and 5.1.6 are compulsory provisions and must be enforced strictly. The formser national standard "Technical Code for Roof Engineering" (GB 50345-2004) shall be abolished simultaneously. This stadard is published by China Architecture & Building Press under the organization of the Standard Rating Research Institute of our Ministry. Ministry of Housing and Urban-Rural Development (MOHURD) May 28, 2012 ForewordAccording to the requirements of "Notice on Printing the Development and Revision Plan of Engineering Construction Standards in 2009" (Jian Biao [2009] No. 88) issued by Ministry of Housing and Urban-Rural Development, this code is revised and drafted on the basis of "Technical Code for Roof Engineering"GB 50345-2004 by Shansi Construction engineering (Group) Corporation and Zhejiang Greatwall Construction Group Co., Ltd. jointly with the departments concerned. This standard consists of 5 chapters and 2 appendixes. The main content covers general provisions, terms, basic requirement, roof engineering design, roof engineering construction, etc. In this Code, the provisions printed in black body type are compulsory ones and must be enforced strictly. The Ministry of Housing and Urban-Rural Development is in charge of the administration of this Code and the explanation of its compulsory provisions, and Shansi Construction engineering Corporation is responsible for the explanation of its specific technical contents. All relevant organizations are kindly requested to sum up and accumulate your experiences in actual practices and accumulate information during the process of implementing this code. The relevant opinions and advice, whenever necessary, can be fedback to Shansi Construction engineering Corporation (address. No.9, Xinjian Road, Tiayuan 030002, Shanxi Province, E-mail. 4085462@sohu.com). Chief drafting organizations. Shansi Construction engineering Corporation and Zhejiang Greatwall Construction Group Co., Ltd. Participating Development Organizations. Beijing Building Construction Research Institute, Zhejiang University of Technology, Taiyuan University of Technology, China Academy of Building Research, China Building Materials Academy - Suzhou Waterproof Reseach Institute, Suzhou New Building Waterproffing Engineering Co., Ltd., China Building Waterproffing Association, Hangzhou Jintang Building Waterproffing Co., Ltd., China Institute of Building Standard Design and Research, Beijing Shengjie Water Proofing Material Co., Ltd., Shanghai Terra Engineering & Industry Co., Ltd., Dalian Xiyang Waterproofing Engineering (Group) Co., Ltd., Ningbo Kede Building Materials Co., Ltd., DuPont China (Group) Co., Ltd., Owens Corning (China) Co., Ltd., and Ningbo Shanquan Building Materials Co., Ltd. Participating organizations. Dow Chemical (China) Investment Company Limited, Dafuxi Building Material Trade (Shanghai) Co., Ltd., and Special Interest Committee on Isocyanate of China Polyurethane Industry Association Chief drafting staffs. Hao Yuzhu, Huo Ruiqi, Yan Yongmao, Li Hongwei, Shi Jiong, Zhu Dongqing, Wang Shouhua, Ha Chengde, Ye Linbiao, Xiang Huatai, Ma Yunfang, Wang Tian, Gao Yanji, Zhang Wenhua, Yang Sheng, Jiang Jingbo, Du Hongxiu and Hu Jun Chief examiners. Li Chenggang, Cai Shaojun, Niu Guangquan, Yang Shanqin, Li Yinqing, Zhang Daozhen, Yu Xinguo, Ye Linchang and Wang Wei Conetens 1 General Provisions...1 2 Terms... 1 3 Basic Requirement...2 4 Roof Engineering Design... 4 4.1 General Requirements...4 4.2 Drainage Design...5 4.3 Design of Sloping Layer and Leveling Layer... 6 4.4 Design of Thermal Insulation Layer and Insulation Layer... 7 4.5 Design of Sheet and FilmWaterproof Layers...10 4.6 Joint Seal Waterproofing Design...12 4.7 Design of Protection Layer and Isolation Layer... 14 4.8 Design of Tile Roof...15 4.9 Design of Metal Plate Roof...17 4.10 Design of Glass Skylight System...19 4.11 Detailed Structure Design... 21 5 Roof Engineering Construction... 39 5.1 General Requirements...39 5.2 Sloping Layer and Construction...40 5.3 Construction of Thermal Insulation Layer and Thermal Barrier... 41 5.4 Construction of Sheet Waterproof Layer... 44 5.5 Construction of FilmWaterproof Layer...47 5.6 Construction of Joint Sealing And Waterproofing... 48 5.7 Construction of Protection Layer and Isolation Layer...50 5.8 Construction of Tile Roof... 51 5.9 Construction of Metal Plate Roof... 53 5.10 Construction of Glass Skylight System... 54 Appendix A Standards for Water Proofing and Thermal Insulation Materials for Roof Engineering...57 Appendix B Main Performance Indexes of Waterproofing and Thermal Insulating Materials for Roof Engineering... 59 Explanation of Wording in this Code...67 List of Quoted Standards... 681 General Provisions1.0.1 This Code is formulated in order to promote the roof engineering level in China, ensure quality, and make the roof engineering of economic feasibility, safety & usability, environmental protection and energy conservation. 1.0.2 This standard is applicable to the design and construction of roof engineering in building construction. 1.0.3 The design and construction of roof engineering shall comply with the relevant requirements of the nation on environmental protection, building energy conservation, fire safety and so on, and be prepared with corresponding measures. 1.0.4 The design and construction of roof engineering shall meet the requirements of the current relevant standards of the nation besides this Code.2 Terms2.0.1 Roof project Design and construction of building roof composed of structural layers such as water proofing, thermal insulation, heat insulation and so on 2.0.2 Vapor barrier Structural layer that prevents indoor vapor permeating into insulation layer 2.0.3 Thermal insulation layer Structural layer that reduces heat exchange on roof 2.0.4 Waterproof layer Structural layer that isolates water from permeating into building inside 2.0.5 Isolation layer Structural layer that eliminates adverse effects like adhesive force, mechanical snap-in force and chemical reaction between two adjacent materials 2.0.6 Protection layer protection layer Structural layer that protects waterproof layer or thermal insulation layer 2.0.7 Insulation layer Structural layer that reduces transmission of solar heat into interior 2.0.8 Compound waterproof layer Waterproof layer composed of sheets and coating compatible with each other 2.0.9 Additional layer Sheet or film reenforcement layer arranged on position vulnerable to leak or breakage 2.0.10 Waterproof cushion Structural layer that functions water- and damp-proofing under tiling or metal sheet 2.0.11 Nail-supporting layer Structural layer of tile roof that hold fixing nails ... ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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