Lapped Dovetails Are The Right Joint For A Top Rail
Lapped dovetails are the right joint for a top rail is bookmark about Joinery bookmarked by mitchell with ID 13016702285 was uploaded on 23-02-2019 and has been viewed 389,815 times.
Q: In carcase and table construction, I often see a lapped dovetail joint connecting a top rail to the legs.Why is this joint preferred over mortise-and-tenon joinery? John Dennis, Temple, NH A: Lapped dovetails are used on a narrow rail above a door or drawer, where there isn't enough thickness for a strong mortise-and-tenon joint.
A kick to the bottom of the leg, or the act of repeatedly sliding the table across a floor, creates racking forces at the top that want to pull the leg away from the rail.The lapped dovetail really shines here, because it has a mechanical advantage over mortise-and-tenon joinery.
The angled sides of the tail pull the joint tight and lock it together, which means it can't pull apart, even if the glue fails.A single lap is strong, but I think a double lapped dovetail, in which the upper rail is joined…...