2000 HEWITT AVE EVERETT EVENT CENTER 2016-01-01 MF Import

� � Construction C1�Suspended ceiling systems are designed to be level (to within 1/8" over 12") and shall be attact,ed to structure at the perimeters. The proposed clouds are sloping and detached from the walls. The manufacturer's listing must be provided which shows the system has been approved for this proposed configuration. UBC Standard 25-2, Section 25.210 BN&H: Armstrong World Industries, the manufacturer of the suspended ACT 8 GWB ceiling systems as drawn and specified for this project, referred our office to a structural engineering office ir. Portland, Oregon, for the generation of engineering calculations and details speci�c to the needs of this project's installation conditions. The manufacturer provides this avenue of certification for their product usage in lieu of issuiny generic reports. This addresses the need to meet code seismic-zone-specific design parameters. Attached are structural engineering calculations and details generated specifically for the suspended ceiling conditions used on this project. This engineering ensures full compliance with UBC Stardard 25-2 and other applicable code references. The special structural details have been added to the project drawings by Addendum No. 4, dated June 3, 2003. These engineering calculations will te submitted to accompany this letter. r 2�Various suspended ceiling detaiis on sheet A11.0 show horizontaily stacked and/or \ ,% disconlinuous, cantilevered ceiiing system (such as for a Iight cove or window shade). The manufacturer's listing must be provided which shows the system has been approved for these proposed confiqurations. BNBH: Piease refer to the repiy for Item 1, above. ! 3. Requirements for lateral bracing and compression struts for the suspended ceilings should be provided on the plans. UBC Standard 25-2, Section 25.212.3 BN&H: Please refer to the reply for Item 1, above, for the various special ceiling conditions. Our standard office detail addressing this matter for all non-special suspended ACT ceilings, has been added to the drawings by Addendum No. 4, dated June 3, 2003, as drawing SK-A11.1-7, Detail 7 Typ. Ceiling Suspension Bracing, Ail Conditions. 4. All rated walis shouid have their listing shown on the plans (all partitions must be minimum one-hour rated unless they are within an office or store space). Sections 601.1, 601.5.2.1 8 1703.1 BN&H: Addendum No. 4, dated June 3, 2003, amended drawing sheet A8.0 Wall Types to add or revise UL listings for Wall Types N, N1, N4, N5, N6, P, P1, & Z3 with existing CMU; and to delete Wall Type N2. 5. Note 12 on sheet A8.0 sheuld be revised to require fire-retardant treated wood, or a non-combustible blocking. Section 602.1. BN&H: Addendum No. 2, dated May 20, 2003, made that change. 6. A d��iail should be added for required backinc� in stair and shaft walls showing a non- con�bustible material. BN&H: Note 12 on sheet A8.0, as revised by Addendum No. 2, dated May20, 2003, appiies to all blocking conditions. All stairs and all handrails and guardrails are z �