Customizable Solar Ground Mount Bracket for Steel Structures

The primary advantage of Z Purlins is their Z-shape profile, which allows them to overlap (splice) at supports, creating a stronger, continuous span ideal for long-span roofing. C Purlins are typically used for wall girts or shorter spans where overlapping is not required.

HDG provides a thick, durable zinc coating that protects the steel from rust, especially in humid, coastal, or industrial environments. It lasts significantly longer than paint or pre-galvanized coatings and requires virtually no maintenance as it is self-healing at cut edges.

These numbers refer to the cross-sectional dimensions: 200 mm is the web height, 75 mm is the flange width, 20 mm is the lip size, and 2.5 mm is the material thickness.

While they are primarily designed for roofing due to their overlapping strength, Z Purlins can be used for walls. However, C Purlins are generally preferred for walls (girts) because they are easier to install without the need for complex overlapping at joints.

Z Purlins are fixed to the main rafters using bolts and cleats (connection plates). To join two pieces together to achieve a long span, you must use splice plates at the overlap point to ensure the structural integrity of the connection.