Specification

2
December 4, 2020
3. Design Basis
3.1 Material Specifications
Wood:
Studs, Roof Joists & Headers Spruce-Pine-Fir #2 or
Hem-Fir #2
Pressure Treated Floor Framing Southern Pine #2
LVLs fb = 2600 psi
2.0E
LSLs fb = 1700 psi
1.3E
Floor Sheathing (Plywood) ¾” Treated T&G
Sturd-I-Floor Shtg.
Wall Sheathing (OSB ForceField) 7/16” OSB Shtg.
Roof Sheathing (OSB) 15/32” OSB Shtg.
Note: Plywood is assumed to conform to US PS1 and OSB is assumed to
conform to US PS2.
3.2 Building Code Requirement – Deflection
Roof Members
Live or Wind L/360
Dead + Live L/240
Floor Members
Live L/360
Dead + Live L/240