Durango 15th St. Through Truss 1997

The Through Truss bridge consists of two side trusses connected across the top and bottom. Trains drive through the box formed by the members.

Steel trusses were created from riveted iron plates and bars that create straight truss members. The stick-like members are connected together at the joints so that they form triangular and then rectangular shaped sections. This diagonal webbing effect gives the complete truss its strength to carry the heavy locomotives with a minimum amount of steel.

The center span of the 15^th Street bridge in Durango is a steel through Pratt truss. The piers are concrete with a stone facia. The large center span went up in 1917 after the structure was moved from Conejos, CO. In 1927, the plate girder was shipped in from Pleasant Valley, UT. The existing wooden truss was built in 1936.

Originally the center span of this bridge was a wooden truss. As shown in the c1900 photo below.

• 15th Street Truss Bridge c1900

See Also:

• South Fork, CO steel through truss
• Black Canyon steel through truss

• Green River, UT three span steel through truss 2000

• Cascade, CO steel through truss 1971

• San Ildefonso steel through truss bridge c1890

• Elk Park steel through truss bridge 1997

• Grand Junction, CO through truss bridge

• Near Salida, CO wooden through truss c1880