J'ORESTRY FOE 4-H CLUBS 



37 



Rules for Scaling Logs 



Table 1, — The contents of logs, in board feet, scaled by the International log rule {using saw cutting 



one-fourth-inch kerf). 



Diam- 







Length of log in feet 







eter at 

 top end 





























of log 



8 



10 



12 



14 



16 



18 



20 



inside 

 bark 





























(inches) 







Contents of log in board feet 





6 



10 



10 



15 



15 



20 



25 



25 



7 



10 



15 



20 



25 



30 



35 



40 



8 



15 



20 



25 



35 



40 



45 



50 



9 



20 



30 



35 



45 



50 



60 



70 



10 



30 



35 



45 



55 



65 



75 



85 



11 



35 



45 



55 



70 



80 



95 



105 



12 



45 



55 



70 



85 



95 



110 



125 



13 



55 



70 



85 



100 



115 



135 



150 



14 



65 



80 



100 



115 



135 



155 



175 



15 



75 



95 



115 



135 



160 



180 



205 



16 



85 



110 



130 



155 



180 



205 



235 



17 



95 



125 



150 



180 



205 



235 



265 



18 



110 



140 



170 



200 



230 



265 



300 



19 



125 



155 



190 



225 



260 



300 



335 



20 



135 



175 



210 



250 



290 



330 



370 



21 



155 



195 



235 



280 



320 



365 



410 



22 



170 



215 



260 



305 



355 



405 



455 



23 



185 



235 



285 



335 



390 



445 



495 



24 



205 



255 



310 



370 



425 



485 



545 



25 



220 



280 



340 



400 



460 



525 



590 



Table 2.- 



-The contents of logs, in board feet, scaled by the Doyle log rule. 



Diam- 



Length of log in feet 



eter at 

 top end 



















of log 



8 



10 



12 



14 



16 



18 



20 



inside 

 bark 



















(inches) 



Contents of log in board feet 



6 



2 



2 



3 



3 



4 



4 



5 



7 



4 



5 



7 



8 



9 



10 



11 



8 



8 



10 



12 



14 



16 



18 



20 



9 



12 



16 



19 



22 



25 



28 



31 



10 



18 



22 



27 



31 



36 



40 



45 



11 



24 



31 



37 



43 



49 



55 



61 



12 



32 



40 



48 



56 



64 



72 



80 



13 



40 



51 



61 



71 



81 



91 



101 



14 



50 



62 



75 



87 



100 



112 



125 



15 



60 



76 



91 



106 



121 



136 



151 



16 



72 



90 



108 



126 



144 



162 



180 



17 



84 



106 



127 



148 



169 



190 



211 



18 



98 



122 



147 



171 



196 



220 



245 



19 



112 



141 



169 



197 



225 



253 



281 



20 



128 



160 



192 



224 



256 



288 



320 



21 



144 



181 



217 



253 



289 



325 



361 



22 



162 



202 



243 



283 



324 



364 



405 



23 



180 



226 



271 



316 



361 



406 



451 



24 



200 



250 



300 



350 



400 



450 



500 



