1 Four Steps to Safe Truss Installations ™ Presented by the Wood Truss Council of America.
-
Upload
holly-manning -
Category
Documents
-
view
220 -
download
1
Transcript of 1 Four Steps to Safe Truss Installations ™ Presented by the Wood Truss Council of America.
1
Four Steps toSafe Truss Installations
™
Presented by the Wood Truss Council of America
2
Most Truss Collapses Are Caused By….
Inadequate Temporary Bracing
3
4 Steps to Safe Truss Installations
1. Storage & Handling2. Temporary Bracing3. Construction Loading4. Fall Protection
4
Jobsite Package Truss Documentation ‘HIB’ Guides
Handling, Installing & Bracing
5
BCSI-B1 Summary Sheet Guide for Handling, Installing & Bracing
of Metal Plate Connected Wood Trusses
6
Step 1 – Metal Plate & Banding Warning
7
Step 1 - Jobsite Storage
Keep off the ground
8
Step 1 - Long Term Storage
9
Avoid Long Term Exposure
10
Step 1 - Storage Conditions
11
Step 1 - Handle with Care
12
Step 1 - Hoisting
13
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.
14
15
Can’t Support Lateral Loads
16
Step 2 - Ground Bracing
17
Step 2 - Bracing Three Planes
Lateral Brace
Diagonal Brace
18
Step 2 – Top Chord Plane
ALWAYS Stabilize Lateral Braces with Diagonal Braces
19
Insufficient Top Chord Bracing
20
Spacer Pieces & No Diagonals!Can Lead to CompressionBuckling of the Top Chord
21
Top Chord Temporary
Bracing with
Spacers
22
Step 2 - Floor Truss Bracing
Lateral Brace Diagonal Brace
23
Bowing or Tilting?
24
Step 2 – SheathingSheathe early & often
25
No Bracing!
26
No Diagonals!
27
Results of Bad Bracing
28
Results of Bad Bracing
29
Results of Bad Bracing
30
Step 2 - Bottom Chord Bracing
Bottom Chord PlaneBottom Chord Plane
31
Step 2 - Bottom Chord Bracing
32
Step 2 - Bottom Chord Bracing
33
Step 2 - Web Plane Bracing
Web PlaneWeb Plane
34
Step 2 - Web Plane Bracing
35
Gable End Bracing
36
Step 2 – Permanent Web Bracing Locations
Compression Web BracingCompression Web Bracing
37
Step 2 - Web Buckling
38
Step 2 - Web Bracing
39
Step 2 - Web Reinforcement
T-Brace
L-Brace MetalReinforcement
Scab Brace
40
Step 3 - Construction Loads
41
B4 Loading DOs and DON’Ts
42
B4 Loading DOs and DON’Ts
43
B4 Loading DOs and DON’Ts
44
B4 Loading DOs and DON’Ts
45
B4 Loading DOs and DON’Ts
46
Loads with No Bracing!
47
Dangers of Overloading
48
Step 4 - Fall Protection
49
Step 4 - Fall Protection A falling worker attached to a single truss
may cause the trusses to “domino”
50
Step 4 – Pre-Assemble Units
Built it on the ground.
Sheath it for stability.
Pick it up and set in place.
51
Step 4 - Scaffolding Personal fall arrest system to OSHA
guidelines
52
Step 4 – Scaffolding?
53
Step 4 - Roof Peak Anchors Sheath and brace a portion of roof and
install a roof anchor to OSHA guidelines
54
BCSI Series
For more info on: Truss repairs Girders Fall protection Jobsite storage Truss handling Toe-nailing for uplift Temporary bracing Construction
loading
55
WTCA is the Information Source
56
Structural Building Components Magazine
57
www.woodtruss.com
58
WTCA Homepage