What is Purlin?

Purlin is a horizontal beam or a rod used for structural support in buildings, most often on the roof. Purlines are supported either by rafters or the walls of the building. They are most commonly used in metal buildings, although sometimes they replace narrowly distributed rafters in wood frame structures.

Purlin roofs support the weight of the roof deck. The roof deck is a wooden panel, a layer plate or a metal foil that creates a roof surface. In wood production, it is usually covered with some type of weather resistant and sometimes insulating material.

There are several types of purlin. They are divided into categories based on the material from which they are made and their shape. Different purlin are used for different purposes, including structural support of walls or floors. Although solid rays of wood are sometimes used as purlin, purlin most commonly used in the roof is steel purlin, which is usually made of cold steelwould be.

Cold shaped steel is produced by rolling or pushing thin steel leaves into the desired shape. It is cheaper for manufacturers than hot -rolled steel and is also easier to work. Although the steel is cold -mounted thicker than steel with hot, it is more likely to break if it is under pressure rather than bending.

There are three types of steel purlin. The rectangular hollow section (RHS) is a type of purlin, which is often used in roofs where the support structure will be visible after the construction is completed. For example, decks and covered terraces often use this type of purlin. When the rod is hollow, the caps are welded to the end of the purlin to prevent moisture to get in and corrode metal. The rectangular shape gives the roof the same aesthetic quality of the roof supported by wooden beams.

cee or c purlin are shaped as a square letter C.The alive often for structuralsupport in walls and as floor beams except roofs. CEE Purlin can also be used to create braces, tie or columns in shelters.

The wall or purlin is shaped as the letter Z. Its shape allows purlin to overlap with others on the joints. This gives Zed Purlina the potential to be much stronger than C Purlina. They are mainly used in walls or for large roof projects.