STAAD Foundation One-Way Shear Discrepancy

Hi,

In the SFA file below, please look at "Interior" job. When I verified the one-way shear capacity, I computed it to be Vc=348.29kN but the software calculated it to be Vc=335.04kN. My calculations are found below:

Vc = 0.17 * (1) * (2000mm) * (209.1mm) * sqrt(24MPa) * (1/1000) = 348.29kN

Please help me determine why there's a discrepancy.

[CE 196] - Isolated Finalized.sfa