Download - 1 Four Steps to Safe Truss Installations ™ Presented by the Wood Truss Council of America
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Four Steps toSafe Truss Installations
™
Presented by the Wood Truss Council of America
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Most Truss Collapses Are Caused By….
Inadequate Temporary Bracing
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4 Steps to Safe Truss Installations
1. Storage & Handling2. Temporary Bracing3. Construction Loading4. Fall Protection
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Jobsite Package Truss Documentation ‘HIB’ Guides
Handling, Installing & Bracing
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BCSI-B1 Summary Sheet Guide for Handling, Installing & Bracing
of Metal Plate Connected Wood Trusses
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Step 1 – Metal Plate & Banding Warning
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Step 1 - Jobsite Storage
Keep off the ground
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Step 1 - Long Term Storage
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Avoid Long Term Exposure
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Step 1 - Storage Conditions
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Step 1 - Handle with Care
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Step 1 - Hoisting
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Step 2 - Bracing Purpose of Bracing: To apply sufficient
support at right angles to the plane of the truss so as to hold every truss member in its design position.
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Can’t Support Lateral Loads
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Step 2 - Ground Bracing
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Step 2 - Bracing Three Planes
Lateral Brace
Diagonal Brace
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Step 2 – Top Chord Plane
ALWAYS Stabilize Lateral Braces with Diagonal Braces
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Insufficient Top Chord Bracing
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Spacer Pieces & No Diagonals!Can Lead to CompressionBuckling of the Top Chord
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Top Chord Temporary
Bracing with
Spacers
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Step 2 - Floor Truss Bracing
Lateral Brace Diagonal Brace
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Bowing or Tilting?
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Step 2 – SheathingSheathe early & often
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No Bracing!
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No Diagonals!
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Results of Bad Bracing
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Results of Bad Bracing
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Results of Bad Bracing
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Step 2 - Bottom Chord Bracing
Bottom Chord PlaneBottom Chord Plane
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Step 2 - Bottom Chord Bracing
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Step 2 - Bottom Chord Bracing
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Step 2 - Web Plane Bracing
Web PlaneWeb Plane
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Step 2 - Web Plane Bracing
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Gable End Bracing
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Step 2 – Permanent Web Bracing Locations
Compression Web BracingCompression Web Bracing
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Step 2 - Web Buckling
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Step 2 - Web Bracing
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Step 2 - Web Reinforcement
T-Brace
L-Brace MetalReinforcement
Scab Brace
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Step 3 - Construction Loads
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B4 Loading DOs and DON’Ts
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B4 Loading DOs and DON’Ts
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B4 Loading DOs and DON’Ts
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B4 Loading DOs and DON’Ts
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B4 Loading DOs and DON’Ts
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Loads with No Bracing!
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Dangers of Overloading
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Step 4 - Fall Protection
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Step 4 - Fall Protection A falling worker attached to a single truss
may cause the trusses to “domino”
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Step 4 – Pre-Assemble Units
Built it on the ground.
Sheath it for stability.
Pick it up and set in place.
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Step 4 - Scaffolding Personal fall arrest system to OSHA
guidelines
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Step 4 – Scaffolding?
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Step 4 - Roof Peak Anchors Sheath and brace a portion of roof and
install a roof anchor to OSHA guidelines
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BCSI Series
For more info on: Truss repairs Girders Fall protection Jobsite storage Truss handling Toe-nailing for uplift Temporary bracing Construction
loading
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WTCA is the Information Source
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Structural Building Components Magazine
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www.woodtruss.com
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WTCA Homepage