Truss Standards for a Steel Roof

AISI Standards

• According to Handbook of Structural Engineering, "since 1998, the AISI Committee on Framing Standards has developed and published four ANSI accredited consensus standards. These publications include (1) General Provisions, (2) Truss Design, (3) Header Design and (4) Prescriptive Method for One and Two Family Dwellings." The book "Guide to Stability Design Criteria for Metal Structures" states that AISI 2007d includes general provisions on floor and roof system design.

AISI S230

• American Iron and Steel Institute (AISI) standard S230 is the standard for cold-formed steel framing. According to "Cold-Formed Steel Design" by Yu and LaBoube, S230 defines the requirements for steel roofs and their trusses, including requirements to withstand wind speeds up to150 miles per hour and seismic loads up to seismic design category E.

When There is No Other Standard

• The book "Structural Steel Design" by Jack McCormac states that if there is an absence of a building code, "the design loads shall be those provided in a publication of the American Society of Civil Engineers titled 'Minimum Design Loads for Buildings and Other Structures.' This publication is commonly referred to as ASCE 7. It was originally published by ANSI and referred to as the ANSI 58.1 Standard."