Talk:Zero force member

Humbug

To quote the original version of the page:

4. If the pin has two sets of collinear members acting on it, all of the members are zero force members.

This is a blatant falsehood. Imagine a truss in the form of a pin-cornered rectangle with diagonals. The diagonals meet at the center in a pin, where they constitute two sets of collinear members. If you trust the above rule and remove the diagonals, the truss will collapse (in engineering terms, the structure will be converted into a mechanism). Freederick 11:34, 9 June 2006 (UTC)

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