25 0.8 75 2.5 175 5.8 275 9.2
30 1.0 100 3.3 200 6.7 300 10.0
50 1.7 120 4.0 225 7.5 325 10.8
60 2.0 150 5.0 250 8.3 350 11.7


TRAUTWINE'S TABLE FOR FINDING INCREASE IN
LENGTH OF UPPER CHORD BEYOND THE
LOWER CHORD ON ACCOUNT OF THE CAMBER.

Multiply Multiply
Depth of Camber Depth of Camber
Truss. by Truss. by

1-4 span 2.00 1-12 span .666
1-5 " 1.60 1-13 " .614
1-6 " 1.33 1-14 " .571
1-7 " 1.15 1-15 " .533
1-8 " 1.00 1-16 " .500
1-9 " .888 1-17 " .470
1-10 " .800 1-18 " .444
1-11 " .727 1-20 " .400



TABLE OF AMERICAN WOODS.

Weight per Resistance in lbs. per
Kind. cubic foot square inch. Value of s.