1804 HEWITT AVE 2022-05-12 - Laserfiche WebLink

• NEW HEWITT/HODGES ASSOCIATES, LLC Page 5 1/ HODGES BUILDING—ELEVATOR HOISTWAY ALTERATION January 12, 2017 Review of Fire-Resistive Construction Provisions Where a new 1-hour FRR wall assembly extends from an existing hoistway wall, the assemblies may be of differing thicknesses. In aligning the exposed faces of the hoistway walls, the membrane of the walls within the hoistway may be discontinuous. In such case, ensure that the framing members within each wall cavity are protected in a manner consistent with the level of protection afforded for the face of the framing within the hoistway. Solid laminated wood posts which comply with IBC Section 602.4.5 for a heavy-timber bearing wall should be separated from the wall cavities of adjoining light-weight construction with gwb. Exposed columns should satisfy IBC Section 602.4.1. As new hoistway openings to residential corridor spaces is part of the work, in accordance with IBC Section 3404.1, opening protection (automatic-closing 20-minute FRR doors with S-labels)as required for corridor construction, consistent with the provisions of Section 1018.6 and Exception 5 to Section 713.14.1, should be provided. This is in addition to the 90-minute FRR presumed to be provided by the elevator hoistway doors themselves. ELEVATOR MACHINE ROOM Access to the existing elevator machine room is provided from Level 5. Project documents indicate that the new MRL (machine room-less) elevator requires a controller room. OBSERVATIONS The existing elevator is a traditional system with lift ropes passing through unprotected openings between the machine room and hoistway. The interstitial space of the Level 5 ceiling and machine room floor was visible while ascending the stairs within the machine room. An access panel to adjacent concealed attic space is present,at the intermediate stair landing. CONSIDERATION If undisturbed, the existing configuration for access to the machine room level should be permitted to remain, consistent with IBC Section 3401.2. To ensure appropriate separation from the building and existing hoistway construction, the new controller room should be enclosed by walls of minimum 1-hour FRR construction with a 45-minute door, consistent with IBC Section 3006.4 and Table 716.5. This arrangement is consistent with the wall and door opening shown on the Controller Room Plan (Thyssen Krupp, Sheet 3 of 5). The dimensions indicated on the Elevator Equipment Plan (Impression Design,Sheet 7 of 10)appear to accommodate this separate controller room, accessed via the topmost stair landing. AEGIS Engineering, PLLC