TEK1 worked in a railway foot over bridge with 2 lifts, 2 ramps, 2 stairs connecting platform and overpass, a canopy and 7 platform stairs. The main challenge is the over pass. As per design, the steel truss after erection must be cambered to different millimeters at different intervals. There were two terms “Residual camber” and “Reference Profile” in the structural drawing. Many do not that what these mean. Any misunderstanding about these terms would result in redoing the entire overpass. But TEK1 had good understanding of these terms and avoided heavy rework.
This blog is to educate the modelers regarding residual camber and reference profile. Kindly refer the camber diagram below.
The residual camber at the south end is 67mm and reference profile at the same end is 62mm. Residual camber is the camber value which must be given in the steel assembly drawings which the steel detailer supply. Whereas reference profile is the camber value which the structure attains after applying all the dead loads. Here the dead loads are concrete load and self weight of the steel.
Hope this helps you. Thanks for reading.
Ramakrishnan.L
TEK1.
