Instructions on Modern American Bridge Building by G. B. N. (George Bates Nichols) Tower
page 52 of 57 (91%)
page 52 of 57 (91%)
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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. |
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