Palram PALRU - Manual (Page 2)

PALRUF® Technical Guide
Greca 70
©PALRAM Industries. All rights reserved. Updated: 27/10/2008
Curved Roof Fastening
ƒ Minimum curving radius along the corrugations - 4.0 m
Roof and Wall Positioning and Fastening
ƒ Start fastening the screws on the Side lap where the Palruf sheet Over-lap the previously installed
sheet.
ƒ Fasten the screws on the lower edge purlin, each second corrugation crest, starting at the same
side.
ƒ Fasten at the internal purlins, at each third corrugation crest.
ƒ Fasten the screws at the upper edge purlin, at each second crest, starting at the same side.
ƒ Wall mounting (cladding) – the same as roofing.
External Purlin Fastener location
Internal Purlin Fastener location
Side-Lap
ƒ Use tow corrugations side-lap where the slope smaller than 10%, long span and large rain loads.
ƒ Start from the side where the PALRUF sheets overlap on top of the other sheet.
ƒ Apply sealing tape along the crest centerline.
ƒ Use sheet to sheet (stitching) fasteners between the purlins, every 300-400 mm .
End-Lap
ƒ Maximum overhang up to 100 mm from screw centerline.
ƒ Minimum overhangs 50 mm from screw centerline.
ƒ Apply sealing strip along screws centerline.
ƒ Roof edge – not more than 100 mm
Stitching Screw
ƒ
Stitching screws are needed for improving side lap sealing in cases of slope smaller than 10%, long
spans and large rain loads.