DesignAmerican Iron and Steel Institute (AISI). 2007 Edition. With the Supplement 2. 2008. 20 p. The design of cold-formed steel trusses for load carrying purposes in buildings shall be in accordance with AISI S100 [CSA S136] and AISI S200, except as modified by the provisions of this standard. This standard shall also apply to manufacturing, quality criteria, installation and testing as they relate to the design of cold-formed steel trusses.