Issue link: http://alpine.uberflip.com/i/493471
1 2 3 4 5 6 7 8 3.01 SPECIFICATIONS & DESIGN OVERVIEW Pre-Engineered Trusses Cold-Formed Steel (CFS) trusses should be specified as "pre-engineered" trusses. The term "pre-engineered" means the individual trusses have been fully analyzed and engineered to meet all specified load conditions. Individual truss designs should be sealed by a Professional Engineer who is registered in the state where the project is located. Pre-Fabricated Trusses CFS trusses should also be specified as "pre- fabricated cold-formed steel (CFS) trusses". Trusses should be fabricated in a shop environment with experienced fabrication personnel. TrusSteel endorses industry truss shop quality control standards as developed by the SBCA's Cold-Formed Steel Council. The terminology "cold-formed steel" is replacing the old terminology of "light gauge steel" for several reasons. In the code standards for these products (AISI, COFS, ICC, etc.), these products are now referred to as cold-formed steel. In addition, the gauge system of referencing material thicknesses is becoming obsolete and has been replaced with mil thickness designations. Industry Standards The specifier should assure that all applicable industry standards are referenced within the project specification. All applicable loads and load conditions, performance criteria, applicable codes, building use and geometry, etc. should be clearly defined within the specifications and project design drawings. For a further discussion on required information, please see "Information Required for Truss Design". Specifying CFS Trusses Design and Review Process Requirements The Building Designer must clearly state, in the plans and specifications, all specific requirements for the roof assemble. Clear and thorough communication of performance criteria will help truss suppliers, general contractors and truss installers provide more accurate pricing, preliminary designs. Truss Design Project plans and specifications will be sent for pricing to companies that manufacture CFS trusses. When a truss manufacturer is awarded the project, the design of the truss system will begin. The truss manufacturer will use the plans and specifications to create an economical truss framing package. Truss Package Submittal When the truss designs have been completed, the designs will be submitted to the Building Designer for review and approval. If the Building Designer accepts the truss submittal, the truss manufacturer will begin fabricating the trusses. If the Building Designer rejects, the truss submittal it will be returned to the truss manufacturer for corrective action. The truss manufacturer will make the necessary corrections and then resubmit the trusses to the Building Designer. Approval, Fabrication and Delivery Once the Building Designer approves the truss submittal package, the truss manufacturer will begin the fabrication of the trusses. After fabrication, the trusses will be delivered to the jobsite, ready to be installed on the building. As a tool for the specifier, a complete Guide Specification for TrusSteel, written in standard three-part format, is available from www.TrusSteel.com. ENGINEERED BY ALPINE S P E C I F Y I N G / D E S I G N I N G