Introduction
A 'coupled' roof is a conventional roof that is constructed on-site. It uses ceiling joists, hanging beams, strutting beams, struts, underpurlins, collar ties, rafters and ridgeboards.
![Diagram of a roof frame showing the top plate, rafter, ridgeboard, collar tie, strut, strutting beam, underpurlin and ceiling joist.](images/page_001_conventional_roof_framing.gif)
A 'coupled' roof is a conventional roof that is constructed on-site. It uses ceiling joists, hanging beams, strutting beams, struts, underpurlins, collar ties, rafters and ridgeboards.