Talk:King post

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Unfortunately there is a serious error in this page and the illustration of the crown post roof is misleading. Crown post roofs predate king post roofs and are not a development of them. They also serve a quite different function. Crown posts were used with common rater roofs, i.e. roofs without side pulrins. The purpose of the crown post and associated collar plate, which it supports and is braced to, is to ensure longitudinal stability of the roof. Without it there would be a tendency for racking. King posts are associated with side purlin roofs that post-date common rafter roofs. The king post is an integral part of the frame that supports the purlins. Hansdampf 08:52, 7 October 2007 (UTC)