Item 77000 model 1418c.
Metal sheet roof structure.
Sheet metal roofing is lightweight fire resistant quick to install and great at shedding water and snow.
Oil canning in metal roofing is an observed waviness or buckling across the flat areas of sheet metal panels that does not normally affect the roof s structural integrity.
While sometimes caused by inferior metal or too low gauge thickness too often it is caused by under or over tightening of roof fasteners that causes the metal to stretch.
A lightweight roof is very useful for large and or old structures as it helps to maintain the overall structural integrity of the building.
In fact if you re building a house or an addition you can often downsize or reduce the number of roof support members.
Tuftex polycarb 2 17 ft x 12 ft corrugated clear polycarbonate plastic roof panel.
On the other hand a maximum is around 8 11 inches 20 30cm.
If it s longer than this external supports are usually required.