We are committed to ensuring every Powell Gee component is made to the exacting standards required by our customers. Testing is a crucial part of Powell Gee’s quality assurance.
All our fixings have specific fastener performance values, which are the maximum forces that the fastener can withstand (measured in kilonewtons). This will ensure that project-specific specification requirements, set out by structural engineers, are complied with. Test values are available on our technical data sheets.
Pull Out Tests
These measure a fastener’s resistance to being pulled out from the substrate.
Pull Through/Over Tests
These measure a fastener’s resistance to the sheet material being pulled over its head.
These measure a fastener’s resistance to lateral forces.
These measure a fastener’s resistance to medial forces. Ultimate tensile strength and breaking strength can be measured.
These measure the force required to twist the fastener’s head from the body.
All of our hex head fasteners and some of our low profiles are coated with a specialist zinc and aluminium epoxy compound. The manufacture process is environmentally sensitive as it does not use any contaminated waste product such as the Cr6 poison, unavoidable in certain galvanising/electro plating processes. Pre hardened fasteners are coated by a dip, spin, bake process with oven temperatures not exceeding 200°C. This produces a multi layered, scratch resistant coating.
Salt Spray Tests
The Salt Spray Test (DIN 50021) measures how long a fastener can resist an aggressive salt spray environment before corroding.
Kesternich Tests (DIN 50018) are carried out at the point of manufacture and measure how long a fastener can resist an aggressive acid-based industrial environment.