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AMERICAN WOOD COUNCIL WO O D S C R E W S 110 DOWEL-TYPE FASTENERS Table 12M WOOD SCREWS: Reference Lateral Design Values, Z, for Single Shear (two member) Connections1,2,3 for sawn lumber or SCL with ASTM 653, Grade 33 steel side plate (tabulated lateral design values are calculated based on an assumed length of wood screw penetration, p, into the main member equal to 10D) Si d e M e m b e r Th i c k n e s s Wo o d S c r e w Di a m e t e r Wo o d S c r e w N u m b e r G= 0 . 6 7 Re d O a k G= 0 . 5 5 Mi x e d M a p l e So u t h e r n P i n e G= 0 . 5 Do u g l a s F i r - L a r c h G= 0 . 4 9 Do u g l a s F i r - L a r c h ( N ) G= 0 . 4 6 Do u g l a s F i r ( S ) He m - F i r ( N ) G= 0 . 4 3 He m - F i r G= 0 . 4 2 Sp r u c e - P i n e - F i r G= 0 . 3 7 Re d w o o d G= 0 . 3 6 Ea s t e r n S o f t w o o d s Sp r u c e - P i n e - F i r ( S ) We s t e r n C e d a r s We s t e r n W o o d s G= 0 . 3 5 No r t h e r n S p e c i e s ts D in. in.lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs. 0.036 0.138 6 89 76 70 69 66 62 60 54 53 52 (20 gage)0.151 7 99 84 78 76 72 68 67 60 59 57 0.164 8 113 97 89 87 83 78 77 69 67 66 0.048 0.138 6 90 77 71 70 67 63 61 55 54 53 (18 gage)0.151 7 100 85 79 77 74 69 68 61 60 58 0.164 8 114 98 90 89 84 79 78 70 69 67 0.060 0.138 6 92 79 73 72 68 64 63 57 56 54 (16 gage)0.151 7 101 87 81 79 75 71 70 63 61 60 0.164 8 116 100 92 90 86 81 79 71 70 68 0.177 9 136 116 107 105 100 94 93 83 82 79 0.190 10 146 125 116 114 108 102 100 90 88 86 0.075 0.138 6 95 82 76 75 71 67 66 59 58 57 (14 gage)0.151 7 105 90 84 82 78 74 72 65 64 62 0.164 8 119 103 95 93 89 84 82 74 73 71 0.177 9 139 119 110 108 103 97 95 86 84 82 0.190 10 150 128 119 117 111 105 103 92 91 88 0.216 12 186 159 147 145 138 130 127 114 112 109 0.242 14 204 175 162 158 151 142 139 125 123 120 0.105 0.138 6 104 90 84 82 79 74 73 66 65 63 (12 gage)0.151 7 114 99 92 90 86 81 80 72 71 69 0.164 8 129 111 103 102 97 92 90 81 80 77 0.177 9 148 128 119 116 111 105 103 93 91 89 0.190 10 160 138 128 125 120 113 111 100 98 96 0.216 12 196 168 156 153 146 138 135 122 120 116 0.242 14 213 183 170 167 159 150 147 132 130 126 0.120 0.138 6 110 95 89 87 83 79 77 70 68 67 (11 gage)0.151 7 120 104 97 95 91 86 84 76 75 73 0.164 8 135 117 109 107 102 96 94 85 84 82 0.177 9 154 133 124 121 116 110 107 97 95 93 0.190 10 166 144 133 131 125 118 116 104 103 100 0.216 12 202 174 162 159 152 143 140 126 124 121 0.242 14 219 189 175 172 164 155 152 137 134 131 0.134 0.138 6 116 100 93 92 88 83 81 73 72 70 (10 gage)0.151 7 126 110 102 100 96 91 89 80 79 77 0.164 8 141 122 114 112 107 101 99 89 88 86 0.177 9 160 139 129 127 121 114 112 101 100 97 0.190 10 173 149 139 136 130 123 121 109 107 104 0.216 12 209 180 167 164 157 148 145 131 129 126 0.242 14 226 195 181 177 169 160 157 141 139 135 0.179 0.138 6 126 107 99 97 92 86 84 76 74 72 (7 gage)0.151 7 139 118 109 107 102 95 93 84 82 80 0.164 8 160 136 126 123 117 110 108 96 95 92 0.177 9 184 160 148 145 138 129 127 113 111 108 0.190 10 198 172 159 156 149 140 137 122 120 117 0.216 12 234 203 189 186 178 168 165 149 146 143 0.242 14 251 217 202 198 190 179 176 159 156 152 0.239 0.138 6 126 107 99 97 92 86 84 76 74 72 (3 gage)0.151 7 139 118 109 107 102 95 93 84 82 80 0.164 8 160 136 126 123 117 110 108 96 95 92 0.177 9 188 160 148 145 138 129 127 113 111 108 0.190 10 204 173 159 156 149 140 137 122 120 117 0.216 12 256 218 201 197 187 176 172 154 151 147 0.242 14 283 241 222 217 207 194 190 170 167 162 1. Tabulated lateral design values, Z, shall be multiplied by all applicable adjustment factors (see Table 11.3.1). 2. Tabulated lateral design values, Z, are for rolled thread wood screws (see Appendix L) inserted in side grain with screw axis perpendicular to wood fibers; screw penetration, p, into the main member equal to 10D; dowel bearing strength, Fe, of 61,850 psi for ASTM A653, Grade 33 steel and screw bending yield strengths, Fyb, of 100,000 psi for 0.099" ≤ D ≤ 0.142", 90,000 psi for 0.142" < D ≤ 0.177", 80,000 psi for 0.177"< D ≤ 0.236", 70,000 psi for 0.236" < D ≤ 0.273". 3. Where the wood screw penetration, p, is less than 10D but not less than 6D, tabulated lateral design values, Z, shall be multiplied by p/10D or lateral design values shall be calculated using the provisions of 12.3 for the reduced penetration. Copyright © American Wood Council. Downloaded/printed pursuant to License Agreement. No reproduction or transfer authorized. Page 39 2130 N Grand Ave 10/1/2024