. Cyclopedia of architecture, carpentry, and building; a general reference work ... in Fig. 65. The line D shows the curve of the lines showing treads and risers may be marked off on the cylinder,or they may be marked off after the veneer is bent around the drum orcylinder. There are various methods of making inside cylinders or wells,and of fastening same to strings. One method is shown in Fig. gives a strong joint when properly made. It will be noticed thatthe cylinder is notched out on the back; the two blocks shown at theback of the offsets are wedges driven in to secure t
. Cyclopedia of architecture, carpentry, and building; a general reference work ... in Fig. 65. The line D shows the curve of the lines showing treads and risers may be marked off on the cylinder,or they may be marked off after the veneer is bent around the drum orcylinder. There are various methods of making inside cylinders or wells,and of fastening same to strings. One method is shown in Fig. gives a strong joint when properly made. It will be noticed thatthe cylinder is notched out on the back; the two blocks shown at theback of the offsets are wedges driven in to secure the cylinder in place,and to drive it up tight to the strings. Fig. 67 shows an 8-inch well-hole with cylinder complete; also the method of trimming and finish-ing same. The cylinder, too, is shown in such a manner that its con-struction will be readily understood. Stairs having a cylindrical or circular opening always requirea weight support underneath them. This support, which is generallymade of rough lumber, is called the carriage, because it is supposed 302 STAIR-BUILDING 39. to carry any reasonable load that may be placed upon the 68 shows the under side of a half-space stair having a carriagebeneath it. The timbers marked S are of rough stuff, and may be2-inch by 6-inch or of greater dimensions. If theyare cut to fit the risers and treads, they will requireto be at least 2-inch by 8-inch. In preparing the rough carriage for thewinders, it will be best to let the back edge of thetread project beyond the back of the riser so that itforms a ledge as shown under C in Fig. 69. Thenfix the cross-carriage pieces under the winders,with the back edge about flush with the backsof risers, securing one end to the well with screws,and the other to the wall string or the wall. Nowcut short pieces, marked 0 0 (Fig. 68), and fix them tightly in betweenthe cross-carriage and the back of the riser as at 5 5 in the section,Fig. 69. These carriages should be of 3-inch by 2-inch
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Keywords: ., bo, bookcentury1900, booksubjectarchitecture, booksubjectbuilding
