Both 16 inches and 24 inches are common measurements for rafter spacing.
Support spacing for corrugated sheets.
For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap.
It often depends on the wideness thickness and the types of roofing materials the climate it has to withstand and many other factors.
The recommended minimum pitch for corrugated roofing is 50.
Be careful not to tear the sheet.
Corrugations should run.
Rain fall capacities data.
For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.
Corrugated roofing maximum support spacing data.
5 7 wp corrugated sheets are installed on structurally sound support members that are positioned at right angles to the direction of slope or water flow.
Corrugated sheet roofing material is widely available and easy to use.
Subtract that number from the width of the panel and then divide by 2 to come up with the spacing for the rafters.