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Program for the analysis of bridges that takes into account the actual procedure of bridge construction. Tango can analyze the following types of bridges: (1) steel bridges; (2) concrete post-tensioned segmental bridges; (3) concrete composite bridges - precast girders with cast-in-place deck; (4) steel/concrete composite bridges; (5) cable-stayed bridges. Tango can analyze the following construction sequences: (1) cantilever construction - cast-in-place or precast; (2) incremental launching; (3) cable-stayed; (4) span-by-span erection; (5) precast girder and deck as composite. Developed by Dr. Man-Chung Tang, who pioneered in many sound and innovative techniques in the design and construction of bridges.