| ARCHITECTURAL
/ ENGINEERING SUGGESTED SPECIFICATIONS FOR STEEL TRUSSES GENERAL - Light gauge steel trusses shall be
fabricated by an authorized Alpine Truss Fabricator in accordance with designs prepared by
Alpine Engineered Products, Inc. Engineering drawings conforming with the design load and
deflection criteria contained in these specifications shall be submitted for approval
before fabrication. Final engineering drawings shall bear the seal of a Registered
Professional Engineer.
DESIGN STANDARDS - Design standards
shall conform with the applicable provisions of the AISI "Specification for the
Design of Cold Formed Steel Structural Members," dated August 19, 1986, with December
11, 1989 Addendum.
TRUSS COMPONENTS - All load bearing
members shall be Alpine TrusSteel components having mechanical properties determined by
testing that conforms to ASTM A370 - Standard Test Methods and Definitions for Mechanical
Testing of Steel Products. The members shall be cold formed to indicated sizes, profiles,
and thickness of steel conforming to ASTM 623, minimum G60 coating, and ASTM A500 with
minimum yield and material thickness as shown in the table above.
QUALITY CONTROL
- Shop fabricate from cold formed steel
components in accordance with shop drawings, using jigging systems to ensure consistent
component placement and alignment of components.
- Field fabrication of trusses is strictly prohibited
unless performed by authorized TrusSteel Fabricators using the Fabricator's shop
assemblers and proper jigging systems.
- Truss components shall be fastened with Alpine screws
only, as shown on the shop drawings.
INSTALLATION
- Handle and store trusses per Alpine TrusSteel
published recommendations.
- Install trusses per Alpine TrusSteel details and the
Truss Fabricator's shop drawings.
- Install required permanent bracing and
bridging as indicated by the drawings and notes of the Architect of
Engineer-of-Record before the application of any loads.
- The field removal, cutting or alteration of any truss
chord and web members is not allowed without prior written approval of the Architect or
Engineer-of-Record and the Truss Designer.
- Damaged chords, webs, and complete trusses shall be
repaired or replaced as directed and approved in writing by the Architect /
Engineer-of-Record and the Truss Designer prior to installation or application of the
repair or replacement.
BRACING - All trusses must be
securely braced both during erection and after permanent installation. Erection
bracing shall hold trusses straight and plumb and in safe condition until decking and
permanent truss bracing has been fastened forming a structurally sound roof framing
system. All erection and permanent bracing shall be installed and all trusses permanently
fastened before application of any loads. Permanent structural cross-bracing to ensure
overall rigidity of the roof system shall be in accordance with the
architectural/engineering plans for the building structure. See truss design drawings for
any additional special bracing requirements. Materials used in bracing are to be furnished
by the erection contractor unless otherwise noted in these specifications.
COMPLETE GUIDE SPECIFICATION
For a copy of our complete TrusSteel Guide
Specification, contact Alpine or on the Internet at http://www.alpeng.com.
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