Following are the typical LRFD & ASD load combinations as per ASCE:

LRFD

1.4(D+F)
1.2(D+F+T)+1.6(L+H)+0.5(Lr or S or R)
1.2D+1.6W+1.0L+0.5(Lr or S or R)
1.2D+1.6(Lr or S or R)+(L+ or 0.8W)
1.2D+1.0E+1.0L+0.2S
0.9D+1.6W+1.6H
0.9D+1.0E+1.6H

ASD

D + F
D + H + F + L + T
D + H + F + (L, or S or R)
D + H + F + 0.75 (L + T) +0.75 (L, or Sor R)
D + H + F + (W or 0.72)
D + H + F+ 0.75 (W or 0.72) + 0.75L + 0.75 (L, or S or R)
0.6 D + W + H
0.6 D + 0.7 E + H

D = dead load
L = live load
Lr = roof live load
W = wind load
S = snow load
E = earthquake load
R = rainwater or ice load
H = load due to lateral earth pressure, ground water pressure or pressure of bulk materials.
F = load due to fluids with well-defined pressures and maximum heights
T = Temperature load

Leave a Reply