Eco-Friendly Galvanized Steel Z Purlin Bracket for Solar Installations

The primary advantage of Z Purlins is their Z-shape profile, which allows them to overlap at supports, creating a stronger, continuous span ideal for long-span roofing. Z purlins are stronger when oriented correctly, whereas 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 steel from rust, especially in humid, coastal, or industrial environments. It lasts significantly longer than paint or pre-galvanized coatings. Unlike painted surfaces, galvanized steel is self-healing at cut edges and requires virtually no maintenance.

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

While 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 main rafters using bolts and cleats. To join two pieces for a long span, splice plates must be used at the overlap point to ensure structural integrity.