Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 276
eful. J span f span rise + rise 250 ARCH CENTERINGS. 251 Obtaining Radius of Segment of Circle.—To get the radius of any segment of a circle,the following rule should be committed tomemory :—Given the span or chord line,and versed sine (rise), square half the chord,divide by the rise, and to the… … in Fig. 833, and these divisions may be sub-divided as indicated. The object of bi-secting the arcs is to get the lines radial. , Setting- Out Curves for Large Archesof Moderate Rise. Arches of large span and moderate risecannot conveniently be struck out froma centre, owing to the length of the…
Carpentry · Joinery
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