No. XVI. Table Of The Crushing Weight Per Superficial Inch Of Square Or Rectangular Pillars, Of Which The Length Does Not Exceed 30 Times The Least Thickness. See Art. 160
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This section is from the book "Elementary Principles Carpentry", by Thomas Tredgold. Also available from Amazon: Elementary Principles Of Carpentry.
No. XVI. Table Of The Crushing Weight Per Superficial Inch Of Square Or Rectangular Pillars, Of Which The Length Does Not Exceed 30 Times The Least Thickness. See Art. 160
Kind of Wood. | Number of Times Length exceeds least Thickness. | ||||||||||||||
2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 | 28 | 30 | |
lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | |
Pine (Northern) ..... | 5192 | 4821 | 4552 | 4310 | 4032 | 3738 | 3441 | 3152 | 2879 | 2624 | 2390 | 2178 | 1986 | 1814 | 1659 |
Oak (English) .. .. | 6234 | 5789 | 5466 | 5174 | 4841 | 4488 | 4132 | 3785 | 3456 | 3151 | 2870 | 2615 | 2385 | 2178 | 1992 |
No. XVII. Table Of The Strength Per Superficial Inch Of Square Or Rectangular Pillars To Resist Flexure, When The Length Is Between 30 And 80 Times The Least Thickness. See Art. 147
Kind of Wood. | Number of Times Length exceeds least Thickness. | ||||||||||||||
30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 60 | 55 | 60 | 70 | 80 | |
lbs. | lbs. | lbs. | lbs | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | |
Pine (Northern) ...... | 326 | 286 | 253 | 226 | 203 | 183 | 166 | 151 | 138 | 127 | 117 | 97 | 81 | 60 | 46 |
Oak (English) .. .. | 331 | 291 | 258 | 231 | 206 | 186 | 169 | 154 | 141 | 129 | 119 | 98 | 82 | 61 | 46 |
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