Rice Lake SURVIVOR OTR Steel Deck - Manual (Page 23)

Pour, Finish, and Cure Concrete Deck 19
6.0 Pour, Finish, and Cure Concrete Deck
Once the load cell cable is installed and wired, a concrete deck OTR is ready for the concrete pour. Install the
access plates (see Figure 6-1) over each load cell location to prevent concrete from spilling into the load cell access
cavities. Also, cover the J-box pocket with cardboard or plastic and apply tape along the top of each frame channel
to protect it from concrete splatters.
Figure 6-1. Load Cell Pocket Cover Plate
6.1 Concrete Specifications
4000 PSI concrete (6 bags/yd 3 ) combined with a rebar grid of #4 rebar, 16" on-center each direction is
recommended. See assembly drawings furnished with the scale for specifications.
6.2 Pour and Finish Concrete Deck
The strength of concrete is largely dependent on the water/cement ratio. Adding extra water to make the concrete
easier to pour and work reduces the ultimate strength and increases the size and number of shrinkage cracks. Mix
the concrete no wetter than a standard 3" slump. To increase flow, consider using an electric concrete vibrator (see
Figure 6-2) rather than adding extra water to the mix.