C Purlin Roof Structure

The purpose of purlins.

C purlin roof structure.

Metal building roof purlins provide three structural functions. Here are some examples of their application. Secondary framing is an important component of many pre engineered metal buildings. Purlin is a critical part of roof structure.

As long the structure has a roof frame c purlins are present. A purlin shed is a structure where the main portal frames are made out of rolled formed sections usually c purlins. They are typically categorized based on either material or the shape. In steel building construction secondary members such as purlins roof and girts wall are frequently cold formed steel c z or u sections or mill rolled c sections.

They just vary from the type of material wood or steel thickness and length. Secondly purlins tie the rafters together stabilizing and strengthening the structure s rigid framing. In the past the majority of roof structures were of wooden construction but over the past 15 to 20 years there has been a vast shift away from wood to metal mainly steel roof construction. The usage of c purlins can range from different type of structures residential commercial or agricultural.

Different types of it cater to different purpose such as supporting walls or the roof floors. Purlin plates are beams which support the mid span of rafters and are supported by posts. C purlins and c girts. By supporting the rafters they allow longer spans than the rafters alone.

We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge. C section purlins or cee section purlins are designed to form the walls and floor joists of a building shell structure making them also ideal for supporting beams needed for mezzanine flooring. Also known as sheeting rails purlins create the roofing members of the secondary framing of a steel building. C purlin and c girt structural steel wind snow weight tables.

Without it there will be no frame for the roof sheet to lay on. Also referred to as secondary structurals this type of framing runs in between primary framing elements creating a structure within a structure much like cross beams in a wooden building. Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc. In addition our c section purlins can also be used for door framing roof trimming window trimming parapet rails and side rails also see z purlins.

Cold formed members can be efficient on a weight basis relative to mill rolled sections for secondary member applications. Purlin plates in wooden construction. C purlins which are in the shape of a c. The term plate means a major horizontal supporting timber.

There are several types of purlins that existed. These purlins are made out of steel sheets that range between 1mm 2mm or 3mm steel. Purlins are also known as cold form or rolled form steel. Z purlins which are in the shape of a z.