D.C. Mun. Regs. tit. 12, r. 12-A404
Strike Section 403.6.1 of the International Building Code without replacement.
Strike Section 404.5 from the International Building Code and insert a new Section 404.5 into the Building Code in its place to read as follows:
Smoke control. A smoke control system shall be installed in accordance with Section 909.
Exception 1: Except for Group I-2 and Group I-1, Condition 2, smoke control is not required for atriums that connect only two stories.
Exception 2: Except for Group I- 2 and Group I-1, Condition 2, smoke control is not required for atriums where all exit access above the lowest level of the atrium is separated from the atrium in accordance with Section 404.6. Exception 3 to Section 404.6 shall not apply.
D.C. Mun. Regs. tit. 12, r. 12-A404