The Timber Research and Development Association (TRADA) and IHS Association

• Product Focus: The Construction Information Service (CIS)

The Timber Research and Development Association (TRADA) - is an internationally recognised centre of excellence on the specification and use of timber and wood products.   TRADA is a company limited by guarantee and not-for-profit membership-based organisation. TRADA's origins go back over 70 years and its name is synonymous with independence and authority. Its position in the industry is unique with a diverse membership encompassing companies and individuals from around the world and across the entire wood supply chain, from producers, merchants and manufacturers, to architects, engineers and end users.  Our aim is to provide members with the highest quality information on timber and wood products to enable them to maximise the benefits that timber can provide.

Further resources:

The most downloaded TRADA documents from The Construction Information Service (CIS):

• Span tables for solid timber members in floors, ceilings and roofs (excluding trussed rafter roofs) for dwellings (2005 reprint with amendments)
• Timber frame housing: UK structural recommendations
• Loft conversion guide - for contractors and designers
• External timber cladding
• Standard method of detailing structural concrete

Useful Links:

• TRADA
• Timber Species database
• Bookshop
• Technical Information – Library