Purlins
Verified by SOLBE Structural Engineering Board
Definition
Purlins are horizontal structural members that span across the primary rafters of a roof or ground structure, providing direct support for the solar mounting rails or trapezoidal roof sheets.
Technical & Structural Breakdown
In industrial solar engineering, secondary structural framing consists of Z-purlins, C-purlins, or Sigma-purlins. They are usually cold-formed steel sections compliant with IS 801 and hot-dip galvanized for extreme atmospheric durability. Solar mounting brackets (like L-feet or hanger bolts) are anchored directly into purlins to transmit wind uplift and gravity loads directly into the building's primary steel frames.
Engineering Specifications
| Compliance Standard(s) | IS 801, IS 2062, IS 277 |
|---|---|
| Primary Use Cases | Providing secondary structural reinforcement for factory metal roofs and commercial structures hosting solar plants. |
| Engineering Category | Structures |