7 1JS 3x3 x ^-x£4-0 /9<s>/o= te-o … & Cross Section of Floor. -4- for first class floor bridges is less than for second or thirdclass floor bridges, because: A: No back wall is required for abutments. In short spansthis saving alone is sufficient to pay the difference in costbetween a second-and a first-class bridge floor. B:…
Bridges · Theses
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
