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AMERICAN WOOD COUNCIL <br />78 DOWEL-TYPE FASTENERS <br />(b) For Roof Sheathing Ring Shank nails (Appen- <br />dix Table L6) or Post-Frame Ring Shank nails (Appen- <br />dix Table L5) that are uncoated carbon steel, reference <br />withdrawal design values determined from Table 12.2E <br />or Equation 12.2-5 shall be permitted to be multiplied <br />by 1.25. <br />(c) For calculation of the fastener reference with- <br />drawal design value in pounds, the unit reference with- <br />drawal design value in lbs/in. of ring shank penetration <br />from 12.2.3.2a or 12.2.3.2b shall be multiplied by the <br />length of ring shank penetration, pt, into the wood <br />member. <br />(d) For other deformed shank nails, reference with- <br />drawal design values shall be permitted to be calculated <br />in accordance with 12.2.3.1. <br />12.2.3.3 Nails and spikes shall not be loaded in <br />withdrawal from end grain of wood (Ceg=0.0). <br />12.2.3.4 Nails and spikes shall not be loaded in <br />withdrawal from end-grain of laminations in cross- <br />laminated timber (Ceg=0.0). <br />12.2.4 Drift Bolts and Drift Pins <br />Reference withdrawal design values, W, for con- <br />nections using drift bolt and drift pin connections shall <br />be determined in accordance with 11.1.1.3. <br />12.2.5 Fastener Head Pull-Through <br />12.2.5.1 For fasteners with round heads, the refer- <br />ence pull-through design value, WH, in pounds for <br />wood side members shall be determined from Table <br />12.2F or Equation 12.2-6, within the range of fastener <br />head diameters, DH, and net side member thicknesses, <br />tns, given in Table 12.2F. Reference pull-through design <br />values, WH, shall be multiplied by all applicable ad- <br />justment factors (see Table 11.3.1) to obtain adjusted <br />pull-through design values, W'H. <br /> <br />Table 12.2B Cut Thread or Rolled Thread Wood Screw Reference Withdrawal Design Values, W1 <br />Tabulated withdrawal design values, W, are in pounds per inch of thread penetration into side grain of wood <br />member (see 12.2.2.1). <br />Specific <br />Gravity, <br />G2 <br />Wood Screw Number <br />6 7 8 9 10 12 14 16 18 20 24 <br />0.73 209 229 249 268 288 327 367 406 446 485 564 <br />0.71 198 216 235 254 272 310 347 384 421 459 533 <br />0.68 181 199 216 233 250 284 318 352 387 421 489 <br />0.67 176 193 209 226 243 276 309 342 375 409 475 <br />0.58 132 144 157 169 182 207 232 256 281 306 356 <br />0.55 119 130 141 152 163 186 208 231 253 275 320 <br />0.51 102 112 121 131 141 160 179 198 217 237 275 <br />0.50 98 107 117 126 135 154 172 191 209 228 264 <br />0.49 94 103 112 121 130 147 165 183 201 219 254 <br />0.47 87 95 103 111 119 136 152 168 185 201 234 <br />0.46 83 91 99 107 114 130 146 161 177 193 224 <br />0.44 76 83 90 97 105 119 133 148 162 176 205 <br />0.43 73 79 86 93 100 114 127 141 155 168 196 <br />0.42 69 76 82 89 95 108 121 134 147 161 187 <br />0.41 66 72 78 85 91 103 116 128 141 153 178 <br />0.40 63 69 75 81 86 98 110 122 134 146 169 <br />0.39 60 65 71 77 82 93 105 116 127 138 161 <br />0.38 57 62 67 73 78 89 99 110 121 131 153 <br />0.37 54 59 64 69 74 84 94 104 114 125 145 <br />0.36 51 56 60 65 70 80 89 99 108 118 137 <br />0.35 48 53 57 62 66 75 84 93 102 111 130 <br />0.31 38 41 45 48 52 59 66 73 80 87 102 <br />1. Tabulated withdrawal design values, W, for wood screw connections shall be multiplied by all applicable adjustment factors (see Table 11.3.1). <br />2. Specific gravity, G, shall be determined in accordance with Table 12.3.3A. <br />Table 12.2B Cut Thread or Rolled Thread Wood Screw Reference Withdrawal Design Values, W1 <br />Copyright © American Wood Council. Downloaded/printed pursuant to License Agreement. No reproduction or transfer authorized. <br />Page 38 <br />2130 N Grand Ave <br />10/1/2024