Canadian engineer . O. IIO. IIO. II 161616 6 4% 6% 3-253-75 6 5 654 20 2020 7H5% 7% 222222 SH 7% 6% 9 242424 7 iiK10 5 3
Canadian engineer . O. IIO. IIO. II 161616 6 4% 6% 3-253-75 6 5 654 20 2020 7H5% 7% 222222 SH 7% 6% 9 242424 7 iiK10 5 * Area of steel over column head = circumference of col umn head in inches x d x p or p depending upon whether thesteel is in tension or compression. This steel is assumed as distributed over the entire widths of the bands. Thusif a band of steel has 2 sq. in. steel in section, the area, effective, for two bands will be 8 sq. in. (See example.) 496 THE CANADIAN ENGINEER Volume ai5 OJSO 030 040 045 050 055 Oj50Values of Cons+an+ C,a-0<30 Fig. 7.—Diagram Giving Values of Constants in Formula The size of column head has been figured for a shear of6o lb. per sq. in. on a circle a distance, t, (the thickness ofslab) outside of the column head. This shear is used simplyas measure of the diagonal tension. The value is somewhatlarger than is permitted in beam design but appears to bewarranted in the case of flat slabs. The steel in the centre of the slabs has been figured fora stress of i6,ooo lb. Diagrams for Designing Slabs.—To provide for casesnot covered by the table, curves for values of C5 and Ce aregiven so that the moment under various conditions can bereadily figured from the formula for the bending momentgiven in a preceding paragraph. Diagrams for Determining Steel In Top and Bottomof Beams or Slabs.—In Figs. 5 to 8, curves are plotted forfinding the values of the constants Cc and Cs in the for-mulas for the st
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
