Types Sheet Metal Seams

Standing seam systems can be used for either metal roofing which is the most common or metal walls.

Types sheet metal seams. In two rows in a staggered pattern. A seam hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself while a seam joins the edges of two materials. Lap seams can be joined by drilling and riveting by soldering or by both riveting and soldering.

The main idea to remember for standing seam systems is that the fastener is hidden whether the panel is attached to the roof deck using a clip or is directly fastened to the decking material under the vertical leg using a fastener flange. There are three types of lap seams. Where strength of seam is a major consideration solid rivets should be copper or copper alloy 1 8 to 3 16 in diameter and spaced 3 o c. There are three types of lap seams.

Hems are commonly used to reinforce an edge hide burrs and rough edges and improve appearance. The grooved seam is commonly used to construct objects made of light sheet metal such as air ducts. Sheet metal seams types of seams fitter allied trade class 19 fitter first year week no. Two pieces of metal are held with their edges parallel and a seam is made along this joint.

Several types of seams used to join sheet metal sections are discussed in this section. The plain lap seam the offset lap seam and the corner lap seam fig. 16 by prasanna gn state the seams. The plain lap seam the offset lap seam and the corner lap seam fig.

Lap seams can be joined by drilling and riveting by soldering or by both riveting and soldering. The lock seam which has an additional fold and is often used for corner seams is a type of grooved seam. State the types of seams. Several types of seams used to join sheet metal sections are discussed in this section.

Edge joints tend to be a weaker type of welding joint so they are more commonly used in sheet metal.