The carpenter's new guide: being a complete book of lines for carpentry and joinery. Treating fully on practical geometry, soffits, brick and plaster groins ... with a great variety of designs for roofs, trussed girders ... with many other things entirely new: the whole founded on true geometrical principles; the theory and practice well explained and fully exemplified on eighty-four copper-plates; including some observations and calculations on the strength of timber (1830)
Nicholson, Peter, 1765-1844 · Philadelphia, J. Grigg · leaf 173
% /7//A ij … Fii/X. i] n=n HH ■n=^i Q^ ^ DESIGNS OF ROOFS. 81 PLATE XLII. This roof is calculated for a spao of seventy or eighty feet. You will observe in this, and the foregoing roofs, that the trusses are the same in num-ber as the purlines which they have to support; for how absurd it is to give a roof…
Carpentry
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