A treatise on architecture and building construction . more accurate. This joint, in varied forms,is used to secure the rails and stiles of doors and windows, tounite the members of heavy machine frames, and to connect thevarious parts of tables, chairs, and other pieces of furniture. 18. Keys and Keying-.—When broad, plain surfaces,such as dados, window backs, table tops, etc., are required,the boards forming them are generally tongued-and-groovedtogether, or*they are doweled and united with glue; but, to secure the surfaceagainst warping ortwisting, pieces ofwood called ^uys arelet into a do
A treatise on architecture and building construction . more accurate. This joint, in varied forms,is used to secure the rails and stiles of doors and windows, tounite the members of heavy machine frames, and to connect thevarious parts of tables, chairs, and other pieces of furniture. 18. Keys and Keying-.—When broad, plain surfaces,such as dados, window backs, table tops, etc., are required,the boards forming them are generally tongued-and-groovedtogether, or*they are doweled and united with glue; but, to secure the surfaceagainst warping ortwisting, pieces ofwood called ^uys arelet into a dovetailedgroove in the back, asshown at a, Fig. keys are eitherplaned off flush withthe surface into whichthey are sunk, or,when extra strengthis required, they maystand up from theback, as shown at /kThey should not beglued in position, butare sometimes se-cured with a single screw or nail at one end, as shown at c, sothat when the material shrinks it will slide upon the key, andthe joint along the keyway or groove will still remain Fig. 12. §10 JOINERY. 13 It). Clamping:.—Boards are sometimes maintainedagainst warping by means of elamping, as shown in Fig. boards a and /; are doweled or tongued-and-groovedtogether on their interior edges to form a close joint, as atc d^ and the clamps Ji^j are glued over tongues worked onthe ends of a and b^ as shown at c.
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Keywords: ., bo, bookcentury1800, booksubjectarchitecture, booksubjectbuilding
