Create Roof Rafters and Battens/Purlins

Rafter type
Rafter Width (rw) Rafter Depth (rd)
Rafter spacing (rs)
Purlin/Batten type
Batten/Purlin Width (pw) Batten/Purlin Depth (pd)
Batten/Purlin spacing (ps)
Fascia Width (fw) Fascia Depth (fd)
Build battens/purlins Build fascia

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