Code of Massachusetts Regulations
780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
Chapter 21 - Masonry
Section 2109 - EMPIRICAL DESIGN OF MASONRY
Subsection 2109.2 - Surface-bonded walls
Current through Register 1531, September 27, 2024
Dry-stacked, surface-bonded concrete masonry walls shall comply with the requirements of Chapter 5 of TMS 402/ACI 530/ASCE 5, except where otherwise noted in this section.
2109.2.1 Strength. Dry-stacked, surface-bonded concrete masonry walls shall be of adequate strength and proportions to support all superimposed loads without exceeding the allowable stresses listed in Table 2109.2.1. Allowable stresses not specified in Table 2109.2.1 shall comply with the requirements of TMS 402/ACI 530/ASCE 5.
TABLE 2109.2.1 ALLOWABLE STRESS GROSS CROSS-SECTIONAL AREA FOR DRY-STACKED, SURFACE-BONDED CONCRETE MASONRY WALLS
| DESCRIPTION | MAXIMUM ALLOWABLE STRESS (psi) |
| Compression standard block | 45 |
| Flexural tension Horizontal span Vertical span |
30 18 |
| Shear | 10 |
| For SI: 1 pound per square inch = 0.006895 MPa. |
2109.2.2 Construction. Construction of dry-stacked, surface-bonded masonry walls, including stacking and leveling of units, mixing and application of mortar and curing and protection shall comply with ASTM C 946.
