capping piece

capping piece, cap piece, cap plate

A piece of timber covering the heads of a series of uprights or other vertical structure.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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.
But over time "capping pieces" sealing the gaps where the iron is bolted together can fall off, allowing water to get in and cause damage.
But, over time, "capping pieces" which seal the gaps where the iron is bolted together can fall off, allowing water to get in and cause damage.
But over time "capping pieces" which seal the gaps where the iron is bolted together can fall off, allowing water to get in and cause damage.