Masonry Design Values: CMU
Masonry design values for CMU (concrete masonry units) and clay brick per TMS 402/602-22 (formerly ACI 530). Includes specified compressive strength f'm, modulus of elasticity Em, allowable stresses, dimensions, and grout strength for hollow and solid-grouted conditions with mortar types M, S, N, O.
| unit type | record id | actual height in (in) | actual length in (in) | actual width in (in) | allowable axial stress psi (psi) | allowable flexural tension psi (psi) | allowable shear vm psi (psi) | condition | f m psi (psi) | gross area in2 (in2) | modular ratio n (dimensionless) | modulus of elasticity psi (psi) | mortar type | net area in2 (in2) | nominal width in (in) | notes | weight psf (psf) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CMU | w10_hollow_M_or_S_fm1500 | 7.625 | 15.625 | 9.625 | 225 | 28 | 38 | hollow | 1,500 | 150.5 | 19 | 1,500,000 | M_or_S | 57 | 10 | Hollow 10-in CMU; used in taller walls and sound control applications | 36 |
| CMU | w10_hollow_M_or_S_fm2000 | 7.625 | 15.625 | 9.625 | 300 | 28 | 45 | hollow | 2,000 | 150.5 | 16 | 1,800,000 | M_or_S | 57 | 10 | Hollow 10-in CMU f'm=2000 psi | 36 |
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