Joist were typically planed smooth (wrought) and sometimes chamfered or beaded. Joists may join to their supporting beams in many ways: joists resting on top of the supporting beams are said to be "lodged"; dropped in using a butt cog joint (a type of lap joint), half-dovetail butt cog, or a half-dovetail lap joint. Joists may also be tenoned in during the raising with a soffit tenon or a tusk tenon (possibly with a housing). Joists can also be joined by being slipped into mortises after the beams are in place such as a chase mortise (pulley mortise), L-mortise, or "short
Dovetail rail well known (and incompatible) cut profiles are those from sight manufacturers such as Novak, BoMar, LPA/TRT, Kimber or the 1911 mil standard ("GI"). Additionally many pistol manufacturers have their own proprietary dovetail cut profiles. Dovetail rail A dovetail rail or dovetail mount can refer to several types of brackets found on firearms primarily for mounting sights. Dovetail "rails" usually refer to any rail with a inverted trapezium (dovetail) cross-section (though the hexagonal-profiled Weaver rail and Picatinny rail are also derivative dovetail designs) running parallel to the bore for mounting a scope or diopter sight to a rifle. These are sometimes