the americans seem to have invented most of the trusses, but this japanese program 'goya' is an amazing tool for calculating the resultant stresses in the members of the truss . . . slowly simone's truss is starting to make sense, though i haven't been able to model it yet . . . the positive stresses are tension and the negative compression . . ! though most of these trusses are loaded from within not from above . . .
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