This page documents a section of the bridge construction on U.S. Highway Route 12 in the southeastern Washington town of Waitsburg. Hotwire Direct became involved through a local concrete contractor who wanted to try foam as an alternative to building up the traditional wood forms for the form liner. The only machine used on this project was a CNC cutter with a straight wire.
This is the bridge with diverted traffic, before the concrete railing is poured.
The truck is loaded up with the shapes for the foam molds.
Hotwire Direct’s 8700 CNC cuts the form liner (4 blocks at a time) in about 38 minutes using 2 wires.
The fasteners are covered up prior to pouring.
The expanded polystyrene (EPS) foam is fastened by mechanical method.
The forms are put into position surrounding the rebar.
One side of the form has the EPS foam insert in place.
Pouring the concrete.
Close up view looking down on the rebar and the cavity that will take the concrete.
Here is the finished bridge freshly poured with the forms removed.