3006 



Chapter 24 



Table 24-23 . — Lateral nail resistance ofSd common nails spaced at three edge distances 

 inflakeboards and plywood of two thicknesses when dry ' and wet^ (Data from Price and 



Gromala 1980) 



Sheathing material 



Max. load 



Dry 



Wet 



3/8 in. 1/2 in. 3/4 in. 3/8 in. 1/2 in. 3/4 in. 



Pounds 



Flakeboard 



Mixed, oriented {V2 in.)-^ 



Low density 305^* 343 383 229 259 286 



15.7 11.2 18.1 21.0 15.8 10.9 



High density 338 335 352 271 302 326 



6.5 16.9 20.1 18.7 19.6 14.4 

 Mixed, oriented (5/8 in.) 



Low density 354 411 427 298 323 327 



8.5 15.4 15.0 20.8 15.3 14.5 

 High density 359 361 401 302 311 351 



12.0 17.1 18.0 19.6 12.0 14.9 

 Mixed, random (1/2 in.) 



Low density 319 341 381 258 309 304 



7.2 13.7 8.9 13.4 23.7 14.8 



High density 314 338 386 294 273 316 



14.2 11. 1 10.4 14.1 11.2 11.6 

 Mixed, random (5/8 in.) 



Low density 308 336 342 256 259 308 



11.7 9.5 8.9 14.3 10.8 10.0 



High density 347 362 349 301 307 356 



8.8 19.4 14.6 19.5 16.9 31.0 



Pine, random (1/2 in.) 314 385 388 257 288 290 



19.6 24.7 12.2 16.6 23.4 24.2 



Yellow-poplar (1/2 in.) 351 370 406 301 290 337 



7.2 13.9 23.7 15.3 15.8 13.9 

 Plywood 

 CDX southern pine 



(1/2 in.) 311 321 386 216 236 289 



10.5 8.9 15.3 11.9 10.7 20.3 



(5/8 in.) 302 307 338 266 249 262 



9.6 16.2 12.8 21.6 15.9 27.9 



'Tested at approximately 72°F and 50 percent RH. 



^Tested after soaking 24 hours in water at 70°F. 



Mixed = white oak, southern red oak, hickory, sweetgum, and southern pine in equal propor- 

 tions; see footnote 1 of table 24-12 for fabrication procedure. Oriented and random refer to flake 

 alignment. Number in parentheses is nominal panel thickness. 



'h'he first number per panel group is an average of nine tests, and the number in italics is the 

 coefficient of variation. 



