Lap seams can be joined by drilling and riveting by soldering or by both riveting and soldering.
Lap seam sheet metal.
Several types of seams used to join sheet metal sections are discussed in this section.
It should only be used where watertightness is not required.
Fabral panel systems includes metal and wall roofing architectural panel systems such as concealed fasteners exposed fasteners interior walls and copper products for architectural structures.
The lap seam is a basic metal seam where one piece overlaps the other.
The industry s current recommended widths are 5 8 inch wide flat lock seams architectural sheet metal manual by smacna and 3 4 inch wide flat lock seams copper and common sense by revere copper.
The plain lap seam the offset lap seam and the corner lap seam fig.
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There are three types of lap seams.