Roof Live Loads
Term Subpurlin Purlin Glulam Reference AT 2 ft * 8 ft 8 ft * 20 ft 20 ft * 50 ft L0 20 psf 20 psf 20 psf ASCE 7 table 4-1 R1 1 1 0.6 ASCE 7 section 4.9.1 R2 1 1 1 ASCE 7 section 4.9.1 Lr 20 psf 20 psf 12 psf ASCE 7 section 4.9.1 wLr 40 lb/ft 160 lb/ft 240 lb/ft
Lr = R1R2L0
wLr = Lr * (tributary width)
