780 CMR, ch. 51, ch. 3, R301, 301.1, 309.3

Current through Register 1538, January 3, 2025

Subsection 309.3

Delete section "R309.3 Flood hazard areas" and replace as follows:

R309.3Flood Hazard Areas. For buildings located in flood hazard areas or, as established by section R322.1.1. garage floors shall be:

1. Elevated to or above the design flood elevation as determined in accordance with section R322.2; or

2. Located below the design flood elevation provided that the floors are at or above grade on not less than one side, are used solely for parking, building access or storage, meet the requirements of section R322.2 and are otherwise constructed in accordance with 780 CMR 51.00: Massachusetts Residential Code.

Revise section R309.5 Fire sprinklers by deleting "Section P2904" and adding "NFPA 13, NFPA 13R or NFPA 13D"

Revise section R310.1 Emergency escape and rescue opening required - Exception #2 by deleting "Section P2904" and adding "NFPA 13, NFPA 13R or NFPA 13D."

Adding Exception #2 to R310.2.1 Minimum size as follows:

2. Single-hung and/or double-hung windows shall have a minimum net clear opening of 3.3 ft² (0.31 m²).

Adding an Exception to R310.2.2 Minimum dimensions as follows:

Exception: Single-hung and/or double-hung windows shall have minimum net clear opening dimensions shall be 20 inches (508 mm) by 24 inches (610 mm) in either direction.

Adding an Exception to R310.7.1 Existing emergency escape and rescue openings Item #1 as follows:

Exception: An existing operable, single-hung or double-hung window shall provide a minimum net clear opening of 3.3 ft² (0.31 m²) with minimum net clear opening dimensions of 20 inches (508 mm) by 24 inches (610 mm) in either direction.

780 CMR, ch. 51, ch. 3, R301, 301.1, 309.3

Amended by Mass Register Issue 1532, eff. 10/11/2024.