Powerdrive DXW Rooflight Fasteners are self-drilling and are specifically designed to efficiently fasten rooflight profile sheets. The large wings help ease and accommodate the stress, often caused by the expansion/contraction (due to daily temperature change) of the rooflight sheets against the shank of the fastener.
Rooflight profiled sheets are generally made of glass-reinforced polyester (GRP) or thermoplastic (PVC, Poly-carbonate) material that have higher coefficient of thermal expansion; greater sheet expansion/contraction put stress on the shank of fasteners, possibly shearing them. Refer to our [ Tools ] section for a compiled list of materials’ coefficients of thermal expansion, along with a thermal expansion calculator.
| Part No. | d x L (mm) | Part No. | dia (mm) – Description |
|---|---|---|---|
| DXW665HO (JC3) | 5.5 x 65 | D25 | 25mm – EPDM Dome Washer |
| DXW675HO (JC3) | 5.5 x 75 | AC25 | 25mm – Aluminium Cone Washer |
Technical Information
| Coating | Corrosion Resistance |
Breaking Loads, kN | |
|---|---|---|---|
| Tensile | Shear | ||
| Zinc/tin 25~ microns, Mechanical coating |
AS 3566 Class 3 | 12.50 | 9.80 |
*Note: Always apply appropriate safety factor.
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