3116 ROCKEFELLER AVE 2016-01-01 MF Import

/ • � � 4. The new exterior walls that are located Iess than 20 feet from the northern properry line should be of minimum one-hour fire-resistive construction. The existing walls and structure supporcing any new exterior walis required to be of one-hour fire resistive construction should be revised to one-hour walls as well. Section 503.21 8c Table 5-A 5. The new windows located lAss than 10 feet from the northern property line should be shown as 45-minute fire rarcd assemblies. Table 5-A. 6. Openings such as soffit or exhaust vents are not permitted less than 10 feet from the northern property line. Table 5-A. Construction 1. Guardrails should be shown not less than 42" in height. Section 509.2 2. A guardrail should be provided at the exterior wall where the stairs are adjacent to a window. Section 509.1 3. The window within the stair enclosure at the main level should be shown as safety glazing. Section 2406.4 4. The shed dormer in Section A/4 should be shown with a minimum of 1" of ventilation air space above the insulation. Calculations should be provided showing the required attic ventilation. Section 1505.3 5. Wall Sections B/5 and D/5 should be removed as they do not apply. 6. Typical Wall Section A/5 is not accurate, it should be revised to show the full basement retaining wall condition. Exiting 1. The new stair serves more than one adjacent level and should therefore be provided with a stair enclosure per Section 1005.3.3.1. Based on that section the following comments appty: a) The stair enclosure should have minimum one-hour fire-resistive construction. Section 1005.33.2 b) The enclosure should be separated from the interior spaces with minimum 60- minute fire-rated assemblies having maximum 450 degree temperature-rise labels. Section 1005.3.3.5 c) A barrier should be provided at the first story which prevents persons from accidentally exiting into the basement. Section 1005.3.3.4 DI:DVPLNIXMYTRII EFIJ I IA ROCAf:FE1.L[R Z