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||D26.000||26mm – EPDM Dome Washer|
|DXW675HO (JC3)||5.5 x 75||ZCW.000||25mm – Galvalume Conical Washer|
|ZSW.000||35mm – Galvalume Saddle Washer|
|Breaking Loads, kN|
|Zinc/tin 25~ microns,
|AS 3566 Class 3||12.50||9.80|
*Note: Always apply appropriate safety factor.