44 SCALING 



Example: A slab triangular on the ends measuring 18 inches on the side 

 and 40 feet in length contains nine bolts. The scaler looks in column "No. 

 of Bolts" and finds 9; then, in column "18X18" opposite "9," in the first 

 column, he finds that the slab contains 315 board feet. If the piece con- 

 tained 9 bolts 14X14 and 9 bolts 16X16, the table indicates that 9 bolts 

 14X14 contain 189 board feet, and 9 bolts 16X16 contain 252 board feet, 

 and the sum of these two gives the total number of 441 board feet in the slab. 



Directions: 



A. Parlies. — Each man will work by himself in this problem. 



B. Equipment Required. 



1 scale stick; 



1 blue lumber crayon; 



1 field note book supplied with Form 5; 



1 copy of table for scaling defect. 



C. Method of Procedure. 



1 . In an area in which logs are available select a specified number of logs 



for scaling. 



2. Number the top end of each log consecutively and place this number 



in the proper column in the form in order that the instructor may 

 check the scaled contents. 



3. Scale the sound contents of each log in accordance with directions 



given in Problem 12. Estimate or actually measure the taper of 

 a log when it is divided into two or more sections in applying the 

 maximum scaling length. 



4. Inspect the log carefully to ascertain whether it has any defects and 



if it has make the deductions by means of the scaling table in accord- 

 ance with the principles outlined above. 



5. Tally the net scale in the proper column. In the "Defect Column" 



show the defect by symbol and amount. If the scaling is done by the 

 Scribner Dec. C. Rule, both the defect and the net scale should be 

 tallied to the nearest ten feet B.M. and the zero to show the full 

 scale added only to the total net scale at the bottom of the page. 



D. i^e/erences.— Numbers 45, 46, 47, 48, 53 and 54. 



