Important national codes for timber building

Code for Design of Timber Structures GB 50005-2005

This is the most important national code for wood buildings in China, controlling the design of single, two or three-storey load-bearingwood structures. Currently the latest version in use is GB 50005-2003 (2005version).
The eleven chapters and sixteenappendices address wood andother products; basic designprinciples; calculations for woodframe members and fasteners;sawn and round timber structures;glue laminated timber structures; light wood frame construction; fireprotection; and preservation.
The code is being revised to improve the elements relating to light woodframe construction, glulam structures, engineered wood structures, seismic resistance and technical issues related to fire protection. The new version GB 50005-2005 has been revised and is anticipated to be approved by MOHURD in 2014.

Code of Design on Building Fire Protection and Prevention – GB 50016 – 2006

This code applies to all construction systems and governs the design of all buildings not exceeding nine-storeys, or 24 metres. It is the predominant fire protection code. All fire protection requirements in other codes must be consistent with GB 50016. Wood buildings in China must meet or exceed all Chinese fire safety and protection code requirements.

At the time of writing, GB 50016 is under review. The proposed amendments relating to wood structures aim to:

· Expand the use of wood roof trusses on existing concrete buildings
· Provide for wood infill walls for mid-rise concrete structures
· Reduce fire protection requirements for single and multiple family units
· Extend wood construction to certain non-residential and industrial buildings
· Enable hybrid construction for multi-storey buildings
· Allow glulam columns and beams in some civil and industrial structures

Code for Construction Quality Acceptance of Timber Structures GB 50206-2002

This code addresses the inspectionand quality acceptance requirementsfor wood and other products, framing, and preservation used inwood frame structures in China. Thisoriginal version has been revisedsubstantially and is expected to bepublished in 2012.
The eight chapters set out basicstipulations for inspection as well asspecific inspection and testing requirements for
1. wood (includingglulam), steel and connection products;
2. sawn wood, round timber,and light wood frame structures; and
3. wood preservation. The nineappendices address such items as testing methodology, grading rules,fastener requirements, and allowable tolerances.

Technical codes for timber building

GB/T 50708-2012 Technical Code of Glued Laminated Timber Structures

This code, which has been approved and published by MOHURD in 2012, applies to the design, construction and inspection of load-bearing glulam structures. It will expand the applications of timber to much bigger non-residential or industrial buildings. It will also increase the utilization of different species, as large engineered wood products can also be made from fast-grown species.

JGJ/T 265-2012 Technical Code Light Wood Trusses

Expected to be published in 2010, this will be the first comprehensive code for metal plated wood trusses. The Code is applicable to the design, construction, inspection and maintenance of light wood truss systems. It will help control product quality through the standardization of the design and manufacturing process of wood trusses and will provide the technical foundations for wood truss design software, simplifying the design and approval process.

GB/T 50361-2005 Technical Code for Partitions with Timber Framework

This national code was issued by MOHURD in 2005. It is the first wall code for wood in China. The code is applicable to residential, office and industry buildings. It covers basic requirements for materials, design, production and maintenance of partitions with timber framework, specifying the approval and acceptance process. This code is taken as an example by the Chinese government for applying more energy-efficient building systems and solutions. The technical code for partitions with timber framework provides guidance and requirements for the installation within existing concrete structures of exterior (up to six stories) and interior (up to 18 stories) infill wood walls, opening up new applications for the use of wood construction in taller buildings.

Local codes for timber building

Shanghai Technical Specification for Wood Frame Construction DG/TJ08-2059-2009

This regional technical specification is a comprehensive wood building code in China. It was published in late 2009.

This code is consistent with various national GB codes but is broader in scope and specifically applicable to wood products. It addresses such key items as foundation design and construction, hybrid construction, building envelope design, protection from rain and water vapour, termite control, energy conservation design, sound control, and inspection procedures and requirements.

This code will open new opportunities to the use of wood for hybrid and mid-rise construction in Shanghai.

GBT50708_2012 JGJT265_2012 GBT50361_2005 DGTJ08_2059_2009
GB50005_2003
GB50016_2006
GB50206_2012

 
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