This section is from the book "A Practical Treatise On The Joints Made And Used By Builders", by Wyvill J. Christy. Also available from Amazon: Practical treatise on the joints made and used by builders.
This is a species of scarf, and often occurs in reparations. It usually consists in a glued-up square-edged joint running in one direction parallel to the fibres, but always oblique to them when crossing the grain. When the piecing, however, is merely lengthening, it is effected by some kind of heading joint already described.
This occurs when boards abut against one another with squared edges or sides, as exemplified in a vast quantity of cheap and common work. Even if nailed to joists, rails, ledges, etc, the joints will open, and buckling, twisting, or casting probably display itself at the edges. Perfect seasoning and screw nails are, however, capable of producing a neat junction under such unfavourable conditions. Fig. 125 is an example of a hinged and beaded variety.
This is the same as has been described under the name of Grooved and Feathered, the groove being taken out of the edge of a board by means of a plane called a plough. This tool is not limited to grooving edges only, for it has attached to it in a position parallel to its side, and connected by means of two stems, strigs, or arms passing through mortises in the body of the plane, an adjustable fence which will let the plough off the edge and enable it to make a groove at any distance from it not exceeding the available length of the arms, which is generally 6 in. or thereabouts. The arms are secured by wedges or screws, and the plough usually has a set of 8 irons from ⅛ in. to ⅝ in. in width, which can be let down by means of a screw-stop or guard to run a groove as much as l ⅛ in. in depth.
Ploughed and Tongued Joint is synonymous with grooved and tongued joint and its alternative appellations.
Plugged Joint is the offshoot of plugging, which consists in driving a wood plug into a mortar joint or else wedging it into a hole drilled or cut for it in order that grounds and other joiner's work may be fixed thereto. The cut hole is by far the best, for if carefully made it does not shake the wall nor loosen the joints, and moreover it admits of a larger surface for attachment, which is sometimes desirable, as, for instance, when the smith fixes lever bell pulls. Driving plugs, to hold well, should be cut somewhat crooked so as to grip by resilience as well as by friction, but backings are better secured by spikes and holdfasts, instead of by plugs, for the above-mentioned reasons.
Rabbeted Joint is the same as a rebated joint, under which head it is described.
This is synonymous with rule joint.
Rebated Joint is formed by taking a rectangular slip out of the edges of two boards to a depth of half their thickness with a rebate plane or side fillister, or, in other words, by rebating them to that extent on different sides. The remaining projections which are equal are lapped over each other, as in Fig. 126, which brings the surfaces of the boards supposed to be of equal thickness into parallel planes. A rebated joint also occurs when one of the surfaces of contact consists of a rebate of any degree of depth.