DESIGN AND CONSTRUCTION GUIDANCE FOR COMMUNITY SAFE ROOMS. FEMA P-361, SECOND EDITION, AUGUST 2008
Comparison of Debris Impact Test Requirements for Tornadoes and Hurricanes
Tornado Safe Room Missile Testing Requirements
| GUIDANCE, CODE, OR STANDARD CRITERIA FOR THE DESIGN MISSILE | HORIZONTAL DEBRIS IMPACT TEST SPEED (MPH) | LARGE MISSILE SPECIMEN | MOMENTUM AT IMPACT (LBF-S)+ | ENERGY AT IMPACT (FT-LBF)+ |
|---|---|---|---|---|
| DOE-STD-1020-2002 | 25 mph | 3,000-lb auto | 3,240 | 67,710 |
| 75 mph | 75-lb pipe | 257 | 14,110 | |
| 150 mph (maximum) | 15-lb 2×4 | 103 | 11,288 | |
| 100 mph (maximum) | 15-lb 2×4 | 68 | 5,017 | |
| FEMA 320/FEMA 361 | 100 (maximum) | 15-lb 2×4 | 68 | 5,017 |
| 80 (minimum) | 15-lb 2×4 | 55 | 3,210 | |
| ICC-500 Storm Shelter Standard | 100 (maximum) | 15-lb 2×4 | 68 | 5,017 |
| 80 (minimum) | 15-lb 2×4 | 55 | 3,210 | |
| IBC/IRC 2006, ASCE 7-05, Florida and North Carolina State Building Codes, ASTM E 1886/E 1996 | N/A | None | N/A | N/A |
Hurricane Safe Room Missile Testing Requirements**
| GUIDANCE, CODE, OR STANDARD CRITERIA FOR THE DESIGN MISSILE | HORIZONTAL DEBRIS IMPACT TEST SPEED (MPH) | LARGE MISSILE SPECIMEN | MOMENTUM AT IMPACT (LBF-S)+ | ENERGY AT IMPACT (FT-LBF)+ |
|---|---|---|---|---|
| DOE-STD-1020-2002 | 50 | 15-lb 2×4 | 34 | 1,254 |
| FEMA 320/FEMA 361 | 128 (maximum) | 9-lb 2×4 | 53 | 4,932 |
| 80 (minimum) | 9-lb 2×4 | 33 | 1,926 | |
| ICC-500 Storm Shelter Standard | 102 (maximum) | 9-lb 2×4 | 42 | 3,132 |
| 64 (minimum) | 9-lb 2×4 | 26 | 1,233 | |
| Florida State Emergency Shelter Program (SESP) Criteria and EOC Design Criteria | 50 (EOC recommended) | 15-lb 2×4 | 34 | 1,254 |
| 55 (EHPA recommended) | 9-lb 2×4 | 23 | 911 | |
| 34 (EHPA minimum) | 9-lb 2×4 | 14 | 348 | |
| IBC/IRC 2006, ASCE 7-05, Florida and North Carolina State Building Codes, ASTM E 1886/E 1996** | 55 | 9-lb 2×4 | 23 | 910 |
| 34 | 9-lb 2×4 | 14 | 348 |
+ lbf-s = pounds (force) seconds and ft-lbf = foot pounds (force)
** Hurricane missile testing requirements in these codes and standards only apply in the windborne debris regions (defined in the code/standard) and not throughout the hurricane-prone region
N/A = Not applicable
