Full Product Manual

EZ Pitched Roof System
5 of 30
Lag Pull-Out Capacities:
Sources: American Wood Council, NDS 2005, Table 11.2 A, 11.3.2 A
Notes:
1) Actual test data in Southern Pine: Test Load at 0.250 inch deflection: 1,800 lbs. uplift (withdrawal); 240 lbs.
lateral. Test Load at 0.125 inch deflection: 695 lbs. uplift (withdrawal); 130 lbs. lateral.
2) Thread must be embedded in a rafter or other structural roof member.
3) See NDS Table 11.5.1 C for required edge distances.
Lag pull-out (withdrawal) capacities (lbs.) in typical lumber:
Specific
Gravity
5/16" Shaft
per 1" thread depth
5/16" Shaft
per 2-1/2" thread depth
Douglas Fir, Larch
.50
266
665
Douglas Fir, South
.46
235
588
Engelmann Spruce, Lodgepole Pine (MSR 1650 f & higher)
.46
235
588
Hem, Fir
.43
212
530
Hem, Fir (North)
.46
235
588
Southern Pine
.55
307
768
Spruce, Pine, Fir
.42
205
513
Spruce, Pine, Fir (E of 2 million psi and higher grades of MSR and MEL)
.50
266
665