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Practical Roof Solutions

There are two basic methods of forming a corner:
1. Hipped Corner
A hipped corner is formed by the perpendicular intersection of two roofs which may or may not be of the same span.  The principle for the hipped corner construction is the same as for full hips except that the truss profiles are generally sloped on one side only.
The support across the junction is again provided by either a girder truss or a wall/beam. When a girder truss is specified provision has to be made for a special hanger to carry the girder truss supporting the hipped end. Mono valley frames are required to complete the framing of the corner.
2. Skew Corners or Dog-Legs

A skew corner is formed by the intersection of two roofs at an angle greater than 90 degrees. The corner is generally framed by positioning a girder truss at the extremity of the two straights with an additional girder positioned across the corner as in figure 14b.
The girder units will typically support loose infill on purlins and binders to maintain the roof plane. The feasibility of framing in this manner is dependant solely upon the span of the longest purlin.  It is not recommended to incorporate hipped ends and tee intersections into skew corners unless a feasibility study has been undertaken before planning has become too far advanced.