Name of File 6413-77-20.pdf cached at 13/12/2017 16:31:11 - with 2 pages. pdfPath: E:\\CMS\webtest\files\79\79d48825-29e5-409c-bf0a-484ae65356d5.pdf. thumbPath: E:\\CMS\webtest\files\pdfthumbs\79d48825-29e5-409c-bf0a-484ae65356d5_1.png. objDoc: 1 - True. objPreview.Log: . strFileName: 79d48825-29e5-409c-bf0a-484ae65356d5_1.png

Members/subscribers must be logged in to view this article


Hipped rafters Two more contributors have reverted to this much-discussed topic. Stuart Marchant writes from London SW18: I have been following the recent correspondence with interest and studying my own roof I fail to understand how Alasdair Beal(1 June 1999) infers that purlins greatly reduce the triangulation forces. The purlins in the roofs that I have seen are generally perpendicular to the rafters with inclined props. These will induce an axial load in the rafter in much the same way as a ridge board, although of a slightly reduced magnitude, resulting in an outward thrust at the wallplate.