How To Seam Copper Sheets

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How to seam copper sheets.

For sheets up to 1 8 in. The backhand method is preferred for thicknesses of 1 4 in. Where lapped or bayonet type expansion provisions in work cannot be used or would not be sufficiently water weatherproof form expansion joints of intermeshing hooked flanges not less than 1. Fabricate nonmoving seams in copper sheet with flat lock seams.

This type of seam is used wherever significant movement of the copper sheets is expected. When welding thin sheets the forehand welding method is preferred. Expansion and contraction are a function of temperature change material properties and the dimensions of the material. 6 4 mm or more.

3 2 mm thick a plain butt joint with squared edges is preferred. It is arguably the most time proven type of roof panel seam.