Welt

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welt

[welt]
(building construction)
In sheet-metal roofing, a seam consisting of two joined sheets of metal whose edges have been folded over each other and fastened down flat.
A strip of wood fastened over a flush seam or joint for added strength.
(engineering)
A strip that has been fastened to the edges of plates that form a butt joint in a steam boiler.

Welt

A seam in flat metal roof coverings where the edges are folded and dressed down; also called single and double welts, depending on the number of folds.

welt

1. In sheet-metal roofing, a seam which joins two sheets; formed by folding over the edges of the sheets, engaging the folded portions and then dressing them down flat.
2. A strip of wood fastened over a flush seam or joint, or an angle, to strengthen it.
References in periodicals archive ?
With the welting panel up, stitch each pillow-cover edge along the previous welting stitching, beginning and ending 2" from each corner.
With foam in place, push seam allowances so they lie flat along boxing and so welting is square with foam edges.