Page:Sheet Metal Drafting.djvu/34

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20
SHEET METAL DRAFTING

Example of Problem 3D.

Fig. 30.

Example of Problem 3E

  Ans. 2"×16" and 4"×14"
1=2"×16"= 32 or
1=4"×14"= 56 2"×20" and 4" × 12"
Total 88 sq. in. Ans. 88 sq. in., total waste.

Example of Problem, 3F.

(Area of sheet) 280 88. 000 (area of waste) .314
84.0
04.00
02.80
01.200
01.120
0.080 Ans 31.4%, waste per sheet.

Example of Problem 3G.

88÷4=22 sq. in., waste per blank.

(Area of blank) 48 22.00 (waste) .46 (approx.)
19.2
02.80
02.88 Ans. 46% waste per blank.