Pascal is the si unit, the base units are
N/m2, kg/(m·s2), or J/m3
Although I'm not sure many people use the latter in any convention!
For air pressure it seems to be more common to use bar, or the Imperial PSI in informal settings
But one post on DIYnot is the only time the Pascal has been used as a unit of measure for masonry strength, rather than the Newton that the rest of planet earth uses.
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