Check Include Shear Steel to include shear steel in the culvert. The shear steel must be designed by the user. The shear steel is defined for six areas: the top slab exterior cells, the bottom slab exterior cells, the top slab interior cells, the bottom slab interior cells, the exterior walls, and the interior walls.
To define the shear steel zones for any area first set the number of zones. Then for each zone input the area of steel (in2/ft) and the length for that zone. The distance from the left end of the area to the start and end of the zone will be automatically calculated and shown. Zones cannot extend past the end of the clear span. The length of the clear span is shown at the top right.
Shear steel can be added by the user to reduce the slab thickness. Even though you may define shear steel in both Design and Analysis modes, the program will only include the effects of shear steel in Analysis Mode. In Design Mode, the members thicknesses will be determining assuming that the concrete alone will resist the applied shear. Slab thickness reduction, if possible, may be investigated in Analysis Mode.