Tophat Purlins
Howick’s Tophat purlins offer a great alternative to C purlins and have many benefits for handling and shipping. Spans of up to 7m are achievable. Sample installation and span information is available here. Benefits include:
- The section is stable and self-stands while being fitted
- The tophats can be fixed directly to their supports without the need for cleats
- The symmetrical section means no braces are required to prevent twisting
- Ridged lips allow for easy fixing
- Product can be easily lapped for joining and optimal performance
- They can be produced in long lengths only restricted by transportation
- Tophats can be nested for transport allowing large quantities to be transported easily
The Howick FRAMA TH700 machine produces a 100mm, 120mm and 150mm tophat section in 0.95 and 1.15mm material.
Tophat purlin jointing details
The Tophat sections can be lapped to increase their performance. Typical spans (NZ Standards):
- 100mm 3.5m
- 120mm 5m
- 150mm 7m
Tophat purlins are also commonly used in shed structures as they offer large spans with minimal material useage.
Tophat purlin jointing details
