psf
pound per square foot
Pressureexact by definition
The pound per square foot is exactly 47.88025898033584 pascals, one 144th of a psi. It is the load unit of North American structural and wind engineering: floor live loads, snow loads and wind pressures are all in psf, and a 40 psf residential floor load is about 1.9 kPa.
Watch out: Psf is used for distributed loads on surfaces and psi for pressures in fluids, which keeps them apart in practice. Soil bearing capacity breaks the pattern and is usually given in ksf, thousands of pounds per square foot.
| 1 psf | 0.047880259 kPa |
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