Are the footings sized for compression and uplift loads assuming a certain soil pressure?
No. The footing design (size and reinforcing) must be determined by the Designer based on the project loads, specific geometry and allowable soil bearing pressure. The footing dimensions, shown on page 39 in the C-SF10 Strong Frame Ordinary Moment Frame catalog are the minimum required for the anchorage of the moment frame anchor bolts to the concrete foundation. However, in the wall bracing portion of the website, footings were sized based on the assumptions stated in General Notes – Prescriptive Wall Bracing. If these assumptions are met and footing sizes (including grade beam and reinforcing) are provided as shown in Foundation Design – Solutions for Footing and Grade Beam, then the foundation sizes are adequate for both bearing and uplift.
