FRAME BUILDER - VOL7 NO2 / 37 
 VI. Truss Supports (Carriers)
A. Member Size
B. Species and Grade
C. Number of Plies
D. Bearing Requirements
E. Connection Requirements
1.	 Nails
2.	 Bolts
3.	 Screws
4.	 Steel Connectors
F. Design Considerations
1.	 Fb Design Values
2.	 Shear Capacity
3.	 Deflection Limits
 VII. Bearing Blocks
A. Purpose and Application
B. Size Requirements
C. Species and Grade
D. Connection Requirements
1.	 Fastener Quantity
2.	 Fastener Type
 VIII. Roof Trusses
A. Design Loads
1.	 Top Chord Live Load
2.	 Top Chord Dead Load
3.	 Bottom Chord Live Load
4.	 Bottom Chord Dead Load
SOME AVAILABLE DOCUMENTS
From National Frame Building Association (NFBA)
•	Post-Frame Building Design Manual, 
Second Edition (National Frame Building 
Association)
•	Accepted Practices for Post-Frame Building 
Construction – Framing Tolerances 
Guide (National Frame Building 
Association)
•	Metal Panel & Trim Installation 
Tolerances Standard
•	Non-Diaphragm Design Guide (Digital 
and Print Editions Available) 
(National Frame Building Association)
Additional Current NFBA Engineering Resources
Available through the NFBA Post-Frame Engineer Portal:
•	NFBA Technical Resources Library
•	NFBA Engineering Webinars 
and AIA Continuing Education 
Programs
•	NFBA Magazine Technical Articles
•	“12 Applications of Post-Frame 
Construction” design resources 
(National Frame Building Association)
From American Society of Agricultural and 
Biological Engineers (ASABE)
•	ASABE EP484.2 — Diaphragm Design of 
Metal-Clad, Wood-Framed Rectangular 
Buildings
•	ASABE EP558 — Load Test for Metal-Clad, 
Wood-Framed Diaphragms
•	ASABE EP559 — Design Requirements 
and Bending Properties for Mechanically 
Laminated Posts
•	ASABE EP486.1 — Shallow Post 
Foundation Design
•	ASABE Paper No. 01-4012 — Uplift 
Resistance of Post Foundations
From Structural Building Components Association 
(SBCA) / WTCA (formerly Wood Truss Council of America — WTCA)
•	BCSI-B1 — Guide for Handling, Installing, 
Restraining & Bracing of Metal Plate 
Connected Wood Trusses
•	BCSI-B2 — Truss Installation and 
Temporary Restraint/Bracing
•	BCSI-B3 — Web Member Permanent 
Restraint/Bracing and Reinforcement
•	BCSI-B4 — Construction Loading
•	BCSI-B5 — Truss Damage, Jobsite 
Modifications & Installation Errors
•	BCSI-B6 — Gable End Frame Permanent 
Restraint/Bracing
•	BCSI-B7 — Temporary Installation 
Restraint/Bracing for Parallel Chord Trusses
•	BCSI-B9 — Multi-Ply Girders
•	BCSI-B10 — Post-Frame Truss Installation, 
Restraint & Bracing
•	BCSI-B11 — Fall Protection & Trusses
•	BCSI Guide to Good Practice for Handling, 
Installing, Restraining & Bracing Metal Plate 
Connected Wood Trusses
•	Commentary on Permanent Restraint/Bracing of 
Metal Plate Connected Wood Trusses
•	Truss Technology in Building informational 
document series
continued on page: 38
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