Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 392
rge arches; and hence thestriking wedges should havea very slight taper, the larger the span the smaller the taper. The center is lowered by driving back the wedges. To lowerthe center uniformly the wedges must be driven back imiformly.This is most easily accomplished by making a mark on the side… … - Temporary Stone Corbel Fig. 33. Arch Center. 319 106 MASONRY CONSTRUCTION Screws may be used instead of wedges for lowering centers. Sand is also employed for the same purpose. The method fol-lowed is to support the center frames by wooden pistons or plungersresting on sand confined in plate-iron…
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
