[Gould, Lucius D.], b. 1814. [from old catalog] · New York, W.T. Comstock · leaf 23
centres, with B C and D C, Fig. i, as radii,describe arcs cutting each other in L ; draw B L, and L Sthe direction required ; set off each way from D equal halfthe width of rail ; also from the points 2 and 3 for pins todescribe the outside and inside curves. To find the vertical sides of the… … STAIR BUILDING. I9 PLATE VIII Exhibits the pla?i of a quarter cylinder at the landing. To find the length of curve required for the easing : Drawthe common pitch from the point B indefinitely ; set up fromL to S equal half the riser ; from the point S, draw the cen-tre of level rail, cutting the…
Stair building
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