Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 307
hownat Fig. 919. The whole would be supportedon timber staging as shown, with wedgesinserted under the centering for striking pur-poses. If the stoneswere of a large size, littleor no lagging would be required, providedthe ribs were sufficiently near together. In the event of constructing centering… … 1 ARCH CENTERINGS. 283 as shown at d (Fig. 917). The geometricalmethod of doing this is as follows :—Fromany convenient points in the plan of theJace of the rib, as 0 to 9, project up to thefront arris of the soffit in elevation. But as to half the breadth of the board in itswidest part, join 0 10,…
Carpentry · Joinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
