. Practical structural design; a text and reference work for engineers, architects, builders, draftsmen and technical schools;. Fig. 49 — Frame with IncUned Strut and In-clined Tie in Fig. 49 b = c = V {a/2y + (hne A-aY = ,. Fig. 50 — Frame with Inclined Tie in Fig. 50 c = V^Tb^ = The rule is known as the Rule of Pythagoras and is givenin every school arithmetic as follows: In every right-angled triangle the square on the hypothenuse isequal to the sum of the squares on the other two sides. In Fig. 48 cP = 8 X 3000 = 24,000 ft. lbs. in member C. 58 PRACTICAL STRUCTURAL DESIGN cP 24
. Practical structural design; a text and reference work for engineers, architects, builders, draftsmen and technical schools;. Fig. 49 — Frame with IncUned Strut and In-clined Tie in Fig. 49 b = c = V {a/2y + (hne A-aY = ,. Fig. 50 — Frame with Inclined Tie in Fig. 50 c = V^Tb^ = The rule is known as the Rule of Pythagoras and is givenin every school arithmetic as follows: In every right-angled triangle the square on the hypothenuse isequal to the sum of the squares on the other two sides. In Fig. 48 cP = 8 X 3000 = 24,000 ft. lbs. in member C. 58 PRACTICAL STRUCTURAL DESIGN cP 24 000The stress in c = — = —7;— = 12,000 lbs. tension, for the stressa 2 acts away from the point B. bP = X 3000 = 24,738 ft. member b. bP 24 738The stress in 6 = — = —^-— = 12,369 lbs. compression, for the a Zi stress-ads toward the point C. In Fig. 49 cP = bP = x 3000 = 24,186 ft. lbs. 24 186Stress in c = stress in 6 = —-— = 12,093 lbs., the character of the stress in each member being determined by whether the mem-ber pulls from the point of fastening or pushes toward the Fig. 50 cP = x 3000 = 24,738 ft. lbs. Stress in c = — = —7i— = 12,369 lbs. tension. bP =
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