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File type:
Link
File description: Ceiling truss loading Web Link Your name: (optional) Michael D. Porter
File: Click here to d/l...
http://www.mecheng.asme.org/database/WIN_ENG/MASTER.HTML
which is made for calculating wooden beam and truss stresses,
winwood.zip.
Might have a look at that if anyone is interested. Might be able to
generate the force calculations required. Haven't tested it myself,
though.