1804 HEWITT AVE 2022-05-12 - Laserfiche WebLink

t 7 • ENGINEERING", MECHANICAL AND ELECTRICAL BUILDING DESIGN March 20,2019 City of Everett—Public Works Department 1 Attn:Drew Martin k:)° 3200 Cedar Street Everett, WA 98201 20 RE:The Hodges Building(Plan Check Number:M1901-003) P ®, 20/8 Plan Check Comments(PLUMBING) et- �®(: ces Dear Drew: Please see below for our responses to the Review Comments that were issued January 16th,2019. For your convenience,the following responses are numbered to match the numerical sequence in the building plan review comments. 1. The ducts for the exhaust fans penetrate the floor assemblies throughout the building. The keynotes specify that the ducts shall be installed without fire dampers per IBC Section 717.6.1 Exceptions 1 through 5. The exception requirements shall be listed in the keynotes similar to the requirements for wall penetrations. See Keynote 4/M2.02 as an example. See IBC Section 107.2.1. RENSCH RESPONSE:Please see updated plans:M2.01,M2.02,M2.03,M2.04,and M2.05. I updated Key Note#2 on each sheet to include specific requirements from IBC 717.6.1. 2. The project includes 4-inch ducts penetrating through dwelling walls at multiple locations throughout the building. Several locations are being installed per IBC Section 717.5.4 Exception 3. See Keynote 4 on Sheet M2.02 for an example. See IBC Section 420.2. The duct penetration at the following additional locations shall include keynotes specify similar construction: a. Sheet M2.01:EF-1A and WH-1 ducts through all walls. b. Sheet M2.02:EF-1B and EF-1B ducts through shaft(i.e.,chase)walls. RENSCH RESPONSE:On M2.01,EF-1A and WHF-1 do not penetrate dwelling unit walls(they penetrate non-fire-resistance rated walls within the dwelling unit,but they do not penetrate any fire-resistance rated walls separating the dwelling unit from the corridor):They penetrate down through mezzanine floor into commercial tenant space(which is one continuous unpartitioned space). I have updated key note#2 on M2.01 to indicate requirements for these penetrations. On M2.02,EF-1B and EF-1C do not penetrate any dwelling unit walls(they penetrate non-fire-resistance rated walls within the dwelling unit,but they do not penetrate any fire-resistance rated walls separating the dwelling unit from the corridor):They penetrate down through a non-fire-resistance rated wall "architectural chase"which is intended to satisfy one of the requirements to the exceptions in IBC 717.6.1(contained and located within a cavity of a wall). I have updated key note#2 on M2.02 to indicate requirements for these penetrations. I also clarified the call-out to the"architectural chase"to indicate it is non-fire-resistance rated. //