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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) | standard | weight psf (psf) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CMU | w8 hollow N fm1800 | 7.625 | 15.625 | 7.625 | 270 | 18 | 40 | hollow | 1,800 | 119.4 | 18 | 1,620,000 | N | 44.9 | 8 | TMS 402/602-22 Table 2; NCMA TEK 18-01D | 31 |
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