Excel Sheet to Design all Types of Footings

Spread footings are usually designed to use 3 ksi < f'c < 4 ksi, whereas modern structural

members frequently use concrete between the range of 4 ksi < f'c < 8 ksi. A higher concrete

strength helps reduction the member’s size. However, the footing’s design is govern by the

bearing capacity and settlement. That means that the strength of the soil might be limiting

factor, and a higher concrete strength would not be relevant.