3000 ROCKEFELLER AVE ADMIN BLDG WEST 2022-05-13

• May 23, 2018 Mr.Tony Lee Snohomish County Courthouse Renovation/Addition Page -r< 4) If the steel columns in Details 15& 16 on Sheet A-503 and 2 on Sheet A-502 are part of the structural frame,they will need to be provided with fire resistive protection. Sections 704.2&602.1 Response:Detail 15 on sheet A-503 and Detail 2 on sheet A-502 have been revised to show 2-HR intumescent coating on the steel framing. Detail 16 is for a screen wall on the roof. It has not been revised. 5) The listing for the two-hour,fire resistive GWB cover around the steel column within the wall shown in Detail 9 on sheet A-503 should be shown on the plans(and any similar). Section 704.2 Response: This detail has been revised. However, the UL Assembly number has been added to Partition type "N"on sheet 1-321 as indicated in comment#6 and not to detail 9 on sheet A-503. 6) Two-hour partition Type N on Sheet 1-321 should have a listing provided on the detail. • Section 703.1 Response:A UL assembly number has been added to this partition type on sheet 1-321. 7) It is not apparent why doors 4620 and 4600B are 90-minute rated as shown on the door schedule. Response: The ratings for these doors has been removed in the 100% CD set. 8) The elevator machine room door is rated however the(southern)wall it is in is not rated: section 3005.4 would not appear to require a fire-resistive separation. Response:A 2-hour fire rated partition tag has been added to plan detail 1 on sheet 1-410. 9) The plywood in partition type 3 on Sheet I-322 should be shown as FRT as it represents a building element from Table 601 that is required to be non-combustible(non-rated)and is also not blocking within the wall cavity(but the wall itself). Exceptions 1.1 and 14 to Section 603.1 Response: This detail has been deleted in the 100%CD set. 10)A listing should be provided that shows the proposed fire-stopping at the curtain walls has been tested in accordance with ASTM E 2307 and provides a minimum two-hour F rating. Section 715.4 Response:A UL assembly has been included on sheet GV-204 in the 100% CD set. Additional information regarding the testing has been included with this letter.