The carpenter's new guide; a complete book of lines for carpentry and joinery, treating fully on practical geometry, soffits, groins, niches, roofs, and domes, and containing a great variety of original designs. Also a full exemplification of the theory and practice of stair building, cornices, mouldings, and dressings of every description. Including also some observations and calculations on the strength of timber (1854)
GROINS. 33 PLATE 18. Fig. 1. Tlte Diagonals of a plaster Groin, wJiicJi are straiglit tipon the Plan, and one of the Side-aiclies heing given, to find the Jach-rihs. Lay down the plan of the ribs, as at B, and draw a rib upon each opening; draw per-pendicular lines from the plan of each opening, at…
Carpentry
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