Materials
Gusset plates are usually either made from cold rolled or galvanized steel based upon its use. Galvanized steel offers more protection from rust, so when the gusset plate is outside, galvanized steel is usually used. The gusset plate is usually painted to match nearby steel and fixtures to give it an added layer of protection.
Occasionally gusset plates will be made from copper or aluminum, but only with small structures that don't require much support. The copper and aluminum gusset plates also provide a more attractive finish for exposed structures.
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—Henry David Thoreau (1817–1862)
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—Lyndon Baines Johnson (1908–1973)