| Load | Symbol | Given Value (psf) (acting downward) |
| dead load | D | 10 |
| weight of ice | Di | 0 |
| earthquake load | E | 2 |
| load due to fluids | F | 0 |
| flood loads | Fa | 0 |
| load due to sub-surface pressure | H | 0 |
| live load | L | 0 |
| roof live load | Lr | 20 |
| rain load | R | 30 |
| snow load | S | 35 |
| self-straining force | T | 0 |
| wind load | W | 18 |
| wind-on-ice | Wi | 0 |
| ASCE 7 | IBC | ASD Load Combination | Possible Values (psf) | Largest Value (psf) |
| 1 | 16-8 | D + F | 10 | 10 |
| 2 | 16-9 | D + H + F + L + T | 10 | 10 |
| 3 | 16-10 | D + H + F + (Lr or S or R) | 30 or 45 or 40 | 45 |
| 4 | 16-11 | D + H + F + 0.75(L + T) + 0.75(Lr or S or R) | 25 or 36.25 or 32.5 | 36.25 |
| 5 | 16-12 | D + H + F + (W or 0.7E) | 28 or 11.4 | 28 |
| 6 | 16-13 | D + H + F + 0.75(W or 0.7E) + 0.75L + 0.75(Lr or S or R) | 38.5 or 49.75 or 46 or 26.05 or 37.3 or 33.55 |
49.75 |
| 7 | 16-14 | 0.6D + W + H | --A | --A |
| 8 | 16-15 | 0.6D + 0.7E + H | --A | --A |
A Combinations 7 and 8 are not applicable because W and E are acting in the same direction (downward) as D. See highlighted paragraph in ASCE 7 section C2.4.
