The rafters of the mono-pitched trusses and/or hip trusses are extended and are site cut to fit against the upper hip board. Off-cuts may be required to be nailed in position to the rafters of the hip trusses. For the longer rafters props may be required to run down to the trusses underneath.
The flat parts of the top chords of the hip trusses and girder must be securely braced together to ensure stability.
The hip corner may be constructed from prefabricated rafter/joist components commonly called Open Jacks or all the corner can be framed with loose rafters, joists and hipboards on site. The hip board is notched over the girder truss and supported off ledgers at the apex of the hip.
This system offers the advantage of continuous rafters and thus easily constructed smooth roof slopes.