Project Overview Architect.pdf

August 11, 2009

USDA South Building Modernization Phase 4A Project Overview/Summary of Work

This is the 1st part of the 4th Phase of a multi-phase renovation program for the modernization program for the South Building of the US Department of Agriculture between Independence Avenue and C Street and 12th and 14th Streets SE in Washington, DC. The purpose is to provide updated, safe, comfortable and accessible office space for USDA employees.

The Phase 4A Work consists of the modernization of the above grade levels of Wing 5 of the USDA South Building. The building includes six floors above grade, an attic mechanical level, and an elevator penthouse; there is also some isolated work on the egress stairs and equipment rooms in the basement and sub basement levels. The existing structural frame is concrete-encased steel and floor slabs are poured-in-place concrete joists with terra cotta infill.

Unique features of this project include selected demolition and reconstruction within an occupied historic building, removal of hazardous materials in the building, and construction of protected fire/construction separation of Wing 5, floors 1-6 and phased zones of construction. Phase 4A is registered to achieve no less than the basic certification level, with Silver Level as the target, through the United States Green Building Council's (USGBC's) LEED-Commercial Interiors (CI) Green Building Rating System. The Contractor will facilitate the documentation and submission process in coordination with the LEED consultant and USDA.

The area of construction will be vacated on all floors and separated by fire rated construction barriers at each end of the wing protecting the occupied sections of the existing building at the Headhouse (North end - Independence Ave) as well as the Tailhouse (South end - C St.) while all outside occupied areas must remain fully operational during the renovation work. Contractor must be able to plan and schedule work to maintain full services to all occupied spaces. There will be construction work over occupied area of the Basement – USDA Print Plant.

The Project Scope includes, but is not limited to the following, as indicated in the contract documents:

A. Architectural Requirements:

• Upgrade and modernize existing office areas.

• Restore/ renovate first floor lobby and central corridor.

• Provide new finishes and partitions for first, third and fourth floor office area.

• Provide new finishes and partitions for second floor office area (Option 1)

• Provide new finishes and partitions for fifth and sixth floor office area (Option 2)

• Tenant and base signage throughout Wing 5.

• Provide two additional new restrooms per floor as well the upgrade of the two (2) existing restrooms.

• Provide two new mechanical equipment rooms, two new electrical distribution rooms and two new telecom rooms per floor.

• Minimum building envelope work.

• New drains, EPDM and copper gutter liner at attic level.

• New mechanical dormers and louvers; roof to be patched where disturbed.

• Court 4 – staging and contractor parking.

• Option 3 consists of renovating existing elevators 51, 52, and 53 – new cabs and penthouse equipment and controls.

• Contractor staging, access and minimal parking will be in Court 4.

B. Structural Requirements:

• New structural framing and supports for new architectural, mechanical, electrical, and plumbing work

• New mechanical equipment pads

• New infill slabs where required.

C. Hazardous Materials Removal:

• Asbestos Abatement: Pipe insulation, duct insulation, floor tile & mastic, gypsum wall board/joint compound.

• Mercury containing light tubes.

• Light ballasts containing PCB.

• Lead paint throughout.