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ITW BCG Roof Truss Guide

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Typical Wood Truss Typical Wood Truss CONFIGURATIONS CONFIGURATIONS Wood trusses are pre-built components that function as structural support members. A truss commonly employs one or more triangles in its construction. The wood truss configurations illustrated here are a representative sampling. The number of panels, configuration of webs and length of spans will vary according to given applications, building materials and regional conditions. Always refer to an engineered drawing for the actual truss design. Stepdown Hip King Post -- Span Up to 16' Queen Post (Fan) -- Spans 10' to 22' Hip Girder Room-In-Attic Fink (W) -- Spans 16' to 33' Howe (K) -- Spans 24' to 36' Vault - Two Bearing Points Double Cantilever With Parapets Fan (Double Fan) -- Spans 30' to 36' Vault - Three Bearing Points Flat Truss With Cantilever (Pratt Configuration) Modified Queen (Multi-Panel) -- Spans 32' to 44' Coffer (Cove) Piggyback Slope Double Fink (WW) -- Spans 40' to 60' Double Howe (KK) -- Spans 40' to 60' Cathedral (CATH) Slope Top Chord Bearing Flat Truss (Pratt Configuration) Large, Long Span Trusses require special handling and erection specifications. The installation of wood trusses requires the same high degree of safety awareness as the installation of any other structural material. Spans over 60' may require complex permanent bracing. Please ask your sales representative for more information. Double Cantilever Flat Truss (Warren Configuration) Sloping Parallel Chords (Howe Configuration) Long Span Sissors -- Spans 45' to 70' Tri-Bearing Sloping Top Chord (Howe Configuration) Modified Fan (Triple Fan) -- Spans 44' to 60' Floor Truss (System 42 - Modified Warren Configuration) Double (DUBL) (Double Pitch) Three Piece Long Span (Field Connected) -- Spans 60' to 80' Triple Fink (WWW) -- Spans 54' to 80' Modified Queen Scissors Scissors Mono Mono Triple Howe (KKK) -- Spans 54' to 80' 6 www.itwbcg.com Howe Scissors Three Piece Raised Center Bay -- Lengths 50' to 100'+ www.itwbcg.com 7

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