The construction process begins with a preset mold into which more than 1,300 feet of rebar is set (top left) to solidify the crossing. Adding more solid integrity are the nine yards of concrete that are poured into each panel (top right). After the panel is cleaned and smoothed, stainless steel studs are inserted (bottom left) into absorption pads that house a Pandrol® clipping system. The completed slab is then loaded onto a truck (bottom right) and transported to the crossing site.
Pandrol Clipping System
Concrete Tub Transport
The MBM crossing installation begins with removal of the existing track and building of the grade upon which each MBM panel is placed. After the bed is leveled and the base rock installed, the panel is then lowered into the framed area. The continous welded rails are set in place and clipped to pre-gauged plates. Grout is then injected underneath to get rid of voids. Wrapping up the process is installation of optional asphalt flangeway filler or the standard rubber flangeway filler and completion of grade work.