The weight of a casting may be approximately estimated from the weight of the pattern, as shown in the table below. In all cases where there are core prints or batteries to sustain the pattern, or other parts which are on the pattern but not on the casting, their weight must be estimated and deducted from the weight of the pattern.

Weight of Castings Cast in a 1-lb. Pattern

1-lb. Pattern

Cast Iron

Zinc

Copper

Brass

Gun-Metal

in lbs.

in lbs.

in lbs.

in lbs.

in lbs.

Mahogany, Nassau

10.7

10.4

12.8

12.2

12.5

Honduras

12.9

12.7

15.3

14.6

15.

" Spanish

8.5

8.2

10.1

9.7

9.9

Pine, Red

12.5

12.1

14.9

14.2

14.6

" White

16.7

16.1

19.8

19.

19.5

" Yellow

14.1

13.6

16.7

16.

16.5