Question

According to Table 402.2 in the Michigan Residential Code, what is the minimum compressive strength of concrete for foundations not exposed to weather?

1,000 PSI
2,500 PSI
2,800 PSI
3,000 PSI

Answer 1

The minimum compressive strength of concrete for foundations not exposed to weather is 3,000 PSI.

Step-by-step explanation:

The minimum compressive strength of concrete for foundations not exposed to weather, according to Table 402.2 in the Michigan Residential Code, is 3,000 PSI.

The compressive strength was calculated by using the equation [14] : F= P/A, where F is compressive strength of specimen in Mega Pascal, P is the maximum applied load by newton and A is the cross-sectional area estimated in mm 2

The grade of M20 concrete is denoted by the letter M or C (Europe) stand for mix & followed by numerical figure is compressive strength. Thus compressive strength of M20 concrete is 20N/mm² (20 MPa) or 2900 Psi.

Regular concrete can typically withstand a pressure from about 10 MPa (1450 psi) to 40 MPa (5800 psi), with lighter duty uses such as blinding concrete having a much lower MPa rating than structural concrete.