Fax cover sheet, OEM design proposal, June 1998

NYC 9/11 Public Portal Document

f ; I SWE HAYDEN CONNELL AECHiTECTS NO. 3362 P. 3/4 Cathenne udiberti • suiverstein Properties, inc. SHCA Project No. 5576CD " OEM Emsrgency Oparatiom Cefitar-7 IVoM Trade Center; Prr^osalfor Additional Architectural and Engineering Design Services: Upgraded Revised fratectlve li'alT Design and Scape Revisions: Cost Eduction Scope Changes"

Dale; June 25,1998

Page 2

Scope of Work • Work with DCAS/OEM to establish the revised “protective walP' design criteria required for this project. • Develop alterr aie design studies of wall assemblies and study their feasibility for Implementation. Wall assemblies will be studied against the revised design Criteria, the impact to the base building exterior wall assembly (in terms of access and ventilation), structural (in terms of floor loading and anchorage) and mechanical systems. • Upon selection of a proposed wall assembly, review and obtain approval of the assembly from DCAS, OEM. Silverstein Properties, Inc. and the Port Authority. • Revise and coordinate the approved lOOYo C.D. drawings and specifications dated 05-04-98 and issue a bulletin forbidding. Scope includes foil coordination with structural, mechanical, telecommunications, audio-visual, radio, security, etc. • Revise architectural and engineering C.D. set to incorporate items 1 .a, 1 b, 1 c, 2.1,2.2,3 & 4 as modified per SHCA’s meeting with DCAS on June 22,1998 in which DCAS clarified die scope of work requested. A summary of the scope of work is as follows:

1 ,a Per previous review with Silverstein Properties, Inc,(SPI), SPI will allow the use of BX Cabling instead of EMT Conduit specified in the C.D. documents in accordance to the PA/7 World Ti-ade Center Mechanical Design Guidelines, Specifications and Standard Decails- Electrical, Communications. l.b Electrical & Telecommunication C.D. will be clarified to show delineation of scope for the telecommunication cabling between Ambassador and DolTT. l.c Eliminate the requested Audio-Visual Equipment in accordance to Exhibit “A” of die DCAS letter. 2.1 Per the DCAS meeting, the steel vault construction including the safe door designed to Vikonks, Inc. specifications for Room 23-16 is eliminated. Standard office foil-height drywall partitions will be utilized for this room. Per the DCAS meeting, all bullet-resistant fiberglass shielding shall be removed in all spaces except the “protective wall” where it will be shown as an add'altemate.

2.2 Eliminate ail bullet-resistant doors and frames with standard hollow metal doors and frames as requested- Similar blast resistant doors will be utilized as part of the “protective wall” only. 3. Elimlnaie folding partitions and suppon steel and replace with acoustically rated standard drywall partitions for Rooms 23-44.23-45 & 23-46 aS requested. 4. See item 2.1 above. 5. The C.D. revisions to the upgraded ‘protective wall’ designed to withstand 150 mph wind loads an: substantially complete SHCA will make revisions under this agreement to incorporate the additional DCAS requested revisions as directed in their June 18,1998 letter. Per the iX/AS meeting, the scope or extent of the wall remains per the upgraded design with the following revisions:

a. Wal! shall be designed to meet wind pressures 90 mph wind loads instead; of 150 mph bads. b. Motorized air dampers shall be installed io the wall per the “upgraded" wall with an alternate deduct for manually operated air dampers. c. Doors shall be "upgraded ’ to meet 90 mph wind loads and folly weatherstripped. wutrnvuosMoociiPeceuiLWHa-reiM «7»cccd phoposalboc

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