Bollman Truss Spans; Bridge #117, Valley R.R. Va
Description:
The Bollman truss span was designed by engineer Wendel Bollman in 1852 that allowed the use of iron for bridges rather than wood, and was adopted for many railroad bridges.
Date Issued:
1924
Institution:
University of Michigan Library
Collection:
Art, Architecture and Engineering Library, Lantern Slide Collection
Language:
UND
Type:
still image