. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. represents one half (see _^.f/. 661.) of thesame in the plane of projection. The con-struction is sometimes such that the jjlanis only a semicircle, as 13, as in the ter-mination of the choir of a church : in whichcase the French call it a cul-de-four; withus it is called a semi-dome. 1996. Through the extremities of thejoints, and through the middle of eachsofite of the section A, let fall on the lineah, ])erpendiculars, whereof all the distancesdc
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. represents one half (see _^.f/. 661.) of thesame in the plane of projection. The con-struction is sometimes such that the jjlanis only a semicircle, as 13, as in the ter-mination of the choir of a church : in whichcase the French call it a cul-de-four; withus it is called a semi-dome. 1996. Through the extremities of thejoints, and through the middle of eachsofite of the section A, let fall on the lineah, ])erpendiculars, whereof all the distancesdc from the centre c will be the radii of thearcs, which will serve for the developcmentof the sofites, of the joints, and for theconstruction of the arch stones. The me-tliod which follows, it will notperhaps give tlie sofites and joints strictlyaccurate, will do so sufficiently for all prac-tical purposes. Upon the developementC make SC equal to the arc MDGC, thenset out to the right of the points of di-vision the parts ST ecjiial to st on the planI? ; tlien raise through the points V\i|)(iu the line SC perpendiculars equal. Chap. III. MASONRY. 605 If we suppose the face or to tlie correspondents e, t, d of the plan B, and draw the curve ESD througli the points so found. ... 1 997. The sofites are ternihiated by four curves, whereas the jouits have two nglit sides,as 131, EI, and DO, EO, and two curved sides, as II, DE, and OO, UE; the widths1)1, DO of the joints are equal to DI, GE of the section; in one direction they are curvedonly one way, but as respects their sofites they are so in every way. The heights of thevoussoirs are given by the section A, their bases on the plan B Thus G, I, in the voussoirnext the keystone, being the most ojiposite points, the base of it on the plan will be comprisedbetween the two arcs cite, which answer to the perpendiculars let fall from G and I. Thebase of the first voussoir, according to the first method, will be ecjual to the surfa
Size: 1302px × 1920px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectarchitects, booksubjectarchitecture
