capping piece

capping piece, cap piece, cap plate

A piece of timber covering the heads of a series of uprights or other vertical structure.
References in periodicals archive ?
This is skinned with a plywood timber decking using a warm roof construction, and clad externally entirely with post-patinated copper clad between the ribs with an SS capping piece along each rib line.
The spaces between the capping pieces and the floor plates are grouted through holes in the seating units on site.