1. Standard Trusses to main roof.
2. Standard trusses with overhang removed on one side.
3. Set of three diminishing Valley Frames nailed directly on to the main trussed rafters. The internal members of the valley frames are omitted for the sake of clarity.
4. Compound Girder of two Howe Trusses permanently fixed together.

NOTES
If a load-bearing wall or beam is available between A-A to support the standard trusses on the main roof, then the compound of Howe Girder Trusses can be substituted by a standard Truss on the return roof.

Valley frames are designed to transfer the tile loading uniformly to the top chords of the underlying trusses, and should be used in all cases rather than constructing this area with common infill timber.

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