. Practical structural design; a text and reference work for engineers, architects, builders, draftsmen and technical schools;. ssion,I = length in feet,w = uniform load per lineal foot,d = depth in feet at center of span. The chord assumes some of the functions of braces as the endsare approached, where the inclination of the chord increases, andthe compression is nearly uniform throughout the length. Thecompression at any point distant y feet from the center is givenby the following formula, ^-sj(^ M + (2/)^. 132 PRACTICAL STRUCTURAL DESIGN The stress in the braces increases from the ends to
. Practical structural design; a text and reference work for engineers, architects, builders, draftsmen and technical schools;. ssion,I = length in feet,w = uniform load per lineal foot,d = depth in feet at center of span. The chord assumes some of the functions of braces as the endsare approached, where the inclination of the chord increases, andthe compression is nearly uniform throughout the length. Thecompression at any point distant y feet from the center is givenby the following formula, ^-sj(^ M + (2/)^. 132 PRACTICAL STRUCTURAL DESIGN The stress in the braces increases from the ends to the center,as in the case of the Queen truss, and may be figured the sameway. The vertical rods at the joints are in tension and the bracesare in compression. The center panel is usually as wide as theheight; which decreases the angles at which the braces are setas they approach the ends. Steeply pitched roofs of the Howe truss type may be figuredby the method of coefficients when the loads are uniform andsymmetrically placed. They may be figured by the cumulatiyeload method or by the shear method when unsymmetrically or. (a)RrP ^^ R2-P RtZP
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