FEMA P55 Coastal Construction Manual, Fourth Edition - Mad Cad

Volume II DETERMINING SITE-SPECIFIC LOADS 8
Table 8-6. Roof Uplift Connector Loads (Based on ASD Design) at Building Edge Zones, plf (33-ft mean roof
height, Exposure C)
Wind Speed
Roof Span (ft)
(a) (mph)
110 115 120 130 140 150 160 170 180
Roof uplift connector load (b)(c)(d) (plf)
24 189 215 241 298 358 424 494 568 647
32 237 269 303 374 451 534 622 716 816
40 285 324 364 450 544 643 750 864 985
48 333 379 426 527 636 753 879 1,012 1,154
COASTAL CONSTRUCTION MANUAL
(a) 700-year wind speed, 3-sec gust.
(b) Uplift connector loads are based on 33-ft mean roof height, Exposure C, roof dead load of 10
psf, and roof overhang length of 2 ft (see Example 8.5).
(c) Uplift connector loads are tabulated in pounds per linear ft of wall. Individual connector loads
can be calculated for various spacing of connectors (e.g., for spacing of connectors at 2 ft
o.c., the individual connector load would be 2 ft times the tabulated value).
(d) Tabulated uplift connector loads are conservatively based on a 20-degree roof slope.
Reduced uplift forces may be calculated for greater roof slopes.
Table 8-7. Lateral Diaphragm Load from Wind Perpendicular to Ridge, plf (33-ft mean roof height, Exposure C)
Wind Speed
Roof Span (ft)
(a) (mph)
110 115 120 130 140 150 160 170 180
Roof diaphragm load (b)(c) for 7:12 roof slope (plf)
24 138 151 164 192 223 256 291 329 369
32 161 176 191 224 260 299 340 384 430
40 186 203 221 259 301 345 393 443 497
48 210 230 250 294 341 391 445 503 563
Floor diaphragm load (plf)
Any 154 168 183 214 249 286 325 367 411
Same figure as Example 8.6, Illustration
A
(a) 700-year wind speed, 3-sec gust.
(b) Lateral diaphragm loads are based on 33-ft mean roof height, Exposure C, and wall
height of 8 ft (see Example 8.6). Tabulated roof diaphragm loads are for a 7:12 roof
slope. Larger loads can be calculated for steeper roof slopes and smaller loads can
be calculated for shallower roof slopes.
(c) Total shear load equals the tabulated unit lateral load by the building length
perpendicular to the wind direction.
8-53