Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 52
nMouldings. out of a round log of timber. The diameteris divided into three equal parts, and per-pendiculars are raised on opposite sides onthe inner ends of the outer divisions. Thefour points in which the circumference istouched are then joined to give the beam f b 1 a e b f. The proportion is… … Fig. 152.—Strongest Beam from a Round Log, i . y2 i v/3 v/3 ^2- When the diameter of i ,7 4.1. a *i v/2 1-414 log a b = d, the depth ap = z~ =-——= •816c/, and the breadth pb = ■ = = v/3 1-732 ■mid. It must be fully understood, of course, thatthe above shows only the mathematicalcalculation…
Carpentry · Joinery
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