Truss Bridge Limitations
What are the limitations to the design of the truss bridge?
A truss type bridge is a configuration based on mathematics. The loading, or
forces ( including the dead weight and live loads) are distributed through
the members ultimately to the bridge supports. The type bridge could be
built of any material, from wood to Concrete, or steel. Schools normally
have contests for students to build bridges out of balsa basswood. So, the
loading, the materials and the method of connecting govern. The limits are
in the materials and connections. The student bridge could be built of
steel instead of balsa wood, with the right connections that bridge would
carry more load than the balsa wood.
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Update: June 2012