A black cambric disk is cut large enough to cover the bottom, when its edges are turned under and tacked in place. Padding a Removable Seat. The simplest form of upholstery is that of padding the board surface of a footstool. Since this operation was covered in the description of the sectional stools in Chapter 2 , it is proposed to examine a webbing job for the seat of the side chair described in the same chapter. Unless an unusually thick covering is to be applied, the dimensions of the removable chair seat frame will provide for an extra %6 m au around, which should be sufficient. Before the covering operations are started, the outer edges of the frame should be beveled or chamfered to protect the fabric covering. As indicated in Figure 6.5, the seat is springless, so the webbing can be tacked directly to the upper surface of the detachable frame. After the positions of the webbing at suitable intervals are determined, the end of the first central longitudinal strip can be fastened in place. Applying the webbing. The tacking and stretching of the webbing in any Welt Cord is opened at the seam and the skirt sewed to the outer side of the lower piece, as in Figure 6.4. Fig. 6.4. Welt. A pleated skirt can be cut 16 in. wide to allow for a hem at the bottom, and about no in. long for the 15in. cheesebox seat. Pleats 2% in. wide spaced at i%in. intervals are formed before the lower edge of the welt is sewed on, and the ends left open. By turning UPHOLSTERY AND SEAT WEAVING 357 upholstery project is a fundamental operation, upon whose proper application the future durability of the work will depend. The basic principle involved is that the webbing strips must be so stretched and interwoven that they will mutually compensate for single sags, while providing a stable foundation for padding or springs. This being the case, the first consideration must be a strong anchorage for all strips at both ends; that is why each one is cut to allow for folding over at the ends. The end of a strip is attached to the frame by at least 3 tacks within approximately 1У2 in. of the cut end, which is then folded over inward and fastened in place with 4 or more large tacks (depending on the width of the webbing and the softness of the wood), which are driven between the first holdmg tacks. The strip is then carried directly across the frame and tightened with a webbing stretcher, as in Figure 6.5. It is then tacked, cut, folded over, and fastened with as many tacks as the width will permit. Webbing stretcher. Whittled from a piece of %in. scrap 3% in. wide by about 7 Ш. long, a webbing stretcher has 6 small nails driven into its working edge, 1 ed to sharp points about 1 in. long. As illustrated, once the sharp points are engaged in the free end of the webbing, the wooden handle is wedged in place to stretch the webbing while it is being tacked down with the holding tacks. The 358 FURNITURE MAKING AND CABINET WORK Fig. 6.6. Forming the hard roll.