42 



SCALING 



TABLES FOR SCALING DEFECT 



Legend for Defect 



P.R. 

 PS. 



S. 

 SI. 

 Sp. 

 Sh. 



c. 



Cr. 



Ch. 



Ck. 



R. 



G.R. 



W. 



B. 



O. L. 



Pk. 



Y. 



Pitch ring 



Pitch seam 



Shake 



Slab 



Split 



Shatter 



Conk 



Crook 



Check 



Chunk 



Rot in cedar 



Ground or stump rot 



Worms 



Broken end 



Overlength 



Punk or sap rot 



Crotch 



Shingle Bolts 



No. 



of 



Bolts 



Size 



18X18 16X16 14X14 12X12 



Bolts per Cord 



20 25 33 44 



Board Feet 



35 



70 



105 



140 



175 



i 210 



i 245 



280 



315 



350 



28 

 56 

 84 

 112 

 140 

 168 

 196 

 224 

 252 

 280 



21 



42 



63 



84 



105 



126 



147 



168 



189 



210 



16 



32 



48 



64 



80 



96 



112 



128 



144 



160 



Length 



4' 4' 



13' 



17' 



21' 



26' 



30' 



i 34' 



I 39' 



I 43' 



Pitch Rings 



Pitch Seam 



Rot 



Diameter 



or 



Width 



10 



11 

 12 

 13 

 14 

 15 



16 

 17 

 18 

 19 

 20 



21 

 22 

 23 

 24 

 25 



26 

 27 

 28 

 29 

 30 



31 

 32 

 33 

 34 

 ,35 

 36 



Waste, Thickness Inches 



4 5 2 3 4 



Defect per Lineal Foot 



