Brown truss
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A Brown truss is a type of bridge truss, used in covered bridges. It is noted for its economical use of materials and is named after the inventor, Josiah Brown Jr., of Buffalo, New York, who patented
Whites Bridge interior showing diagonal members on sides and horizontal diagonal roof support, forming the top of the box truss
Whites Bridge underside, showing floor supports pinned to side (diagonal) truss members. Bottom of diagonal truss members protrude below the sheathing.
Ada Covered Bridge looking upward. Truss member ends can be seen protruding below sheathing. Very top of truss is visible above sheathing gap below roofline. This gap admitted light, making the bridge interior usable, if somewhat dark.
Bottom of diagonal truss members interlock with floor (Fallasburg Bridge)
Box truss
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A box truss is a structure composed of three or more chords connected by transverse and/or diagonal structural elements.
A box truss structure in a bridge of the Southern Pacific Railroad in California