Lap Seam Sheet Metal

Several types of seams used to join sheet metal sections are discussed in this section.

Lap seam sheet metal.

When developing sheet metal patterns ensure you add sufficient material to the base dimensions to make the seams. If your panels aren t layered properly water damage can occur. Capped on seam also known as the circular lap seam the capped on seam is created by laying a flat round piece of metal over a smaller rounded piece such as the base of a cylinder. Aep span offers a portfolio of quality metal roof and walls which have been tested by an accredited third.

If an edge joint is required for bigger or more weight bearing construction it can be strengthened using filler metal. This seam should only be used on copper sheets with weights up to 20 ounces. There are three types of lap seams. Position the tape with the release backing on the top side.

Edge joints tend to be a weaker type of welding joint so they are more commonly used in sheet metal. High performance buildings require high performance metal roof and wall products. Peel back the release backing to start the application. Where as the slip expansion lock is formed by braking a sheet of copper the lock on this seam is formed by soldering a small strip of copper below the sheet.

The plain lap seam the offset lap seam and the corner lap seam fig. Lap seams are often used to connected two ends to make a cylinder and are used in making boilers auto bodies wall panels metal sculpture and metal roofing. Metal roofs though less appealing than shingle or tile is a more fire resistant and heat reflecting roofing option. Two pieces of metal are held with their edges parallel and a seam is made along this joint.

Lay 3 inch wide butyl tape over all vertical metal panel seams.