Widedek® is an angular trapezoidal fluted sheet and is similar in appearance to Tufdek® IBR profiled sheeting, the difference being a wider cover width of the sheet and shallower flutes. Widedek® sheeting has a cover width of 760mm and the depth of the flutes on Widedek® is 29mm.
Safintra 0.5mm thick AZ150 Zincal® Widedek® profiled roof sheeting, fixed to intermediate steel purlins at 1700mm centres and to ridge and eaves purlins at 1500mm centres, with #12 x 65mm Fixtite™ or Safintra approved hex head self-drilling fasteners at every second crest at intermediate purlins and every crest at eaves purlins in accordance with the manufacturer’s recommendations.
The sheeting shall be Widedek® trapezoidal type profile as manufactured by Safintra. The profile shall be roll-formed with 5 trapezoidal ribs at 191mm centres with a nett cover of 760mm. The rib height shall be 29mm and in accordance with the manufacturer’s specification.
All profiles are rolled with stiffener ribs, unless otherwise specified.
Note that when using Aluminium material on galvanized steel purlins, the use of an isolation tape or similar to prevent the bridging of the two dissimilar materials is recommended. Should the two metals have direct contact it will ultimately result in the manifestation of bimetallic corrosion, and the service life of the aluminium will be compromised.
Material and coating thickness can vary regionally. Consult your local Safintra branch for availability.
Purlin Spacings are dependent on both downward loading and negative suction loading caused by wind. An engineer should be consulted to calculate the load (kN/m2) for your particular application.
*0.80 Aluminium-Zinc Material is rolled in G275.
LENGTH AND ROOF PITCH
A length variation range of +10mm or -0mm, and a width tolerance of ±7.5mm is permissible. This applies to straight sheet lengths only.
During installation, clean the roof daily by removing all swarf, pop rivets and unused fasteners or any other debris.
Safintra recommends the use of Fixtite™ or Safintra approved Class 4 fasteners.