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TechWorld

TechWorld

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Overview

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Location: Washington DC

Project Size: $7,194,157.60

Owner: TechWorld Owner’s Association

Engineer: Construction Insight DC LLC

Project Duration: 2 years

The TechWorld campus is located in downtown Washington DC right next to Chinatown and two blocks from the Capital One Arena. 4 different addresses span the city block that sits overtop of the 500,000 square foot garage. Repairs at this jobsite required coordination with the Renaissance Hotel, the DEA, several restaurants, a labor union, a post office, and a building undergoing a complete top to bottom renovation. Two years were spent working inside these spaces as well as the loading dock and large parking garage below. Water leaking from a large paver plaza above and heavy traffic inside the garage contributed to the deteriorating condition of the concrete surfaces on the property. In addition to water entering from above, water was also making its way into the garage from below the mat slab and through the foundation walls. Thousands of feet of horizontal and vertical grout injection were carefully performed and monitored over several months to ensure sub-terranean water was being directed elsewhere. While the source of the water infiltration was being addressed, hydro demolition was performed on the concrete surfaces to repair the large scale of delaminations. Once structural repairs were complete, expansion joints and waterproofing were installed to ensure the new slabs were protected from future movement and moisture.

Notable project work scope items included:

 ·         75,750 square feet of partial depth hydro demolition and install of new concrete slab

·         10,000 square feet of mat slab repair

·         500,000 square feet of corrosion inhibitor treatment and urethane traffic membrane install

·         Over 5,000 linear feet of grout injection at wall and deck cracks

·         Over 20,000 linear feet of new rebar

·         5,365 linear feet of expansion joint removal and replacement

·         600,000 sf of new paint on soffit, walls, and columns

·         New Elevator Lobby slip joints

·         390 linear feet of heavy-duty expansion joint and steel cover plate replacement at the properties loading dock

·         New trench drains and concrete islands at garage entrances

National Capital Bank

National Capital Bank

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Overview

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Location: Washington, DC 

Owner: The National Capital Bank of Washington

Engineer: Tadjer Cohen Edelson Associates

Project Duration:

National Capital Bank is a full-service community bank headquartered on Capitol Hill in Washington DC. Founded and built in 1889, it is Washington DC’s oldest bank. Offering walk in and drive through service, NCB is well positioned to assist its surrounding community.

 

This project addressed various structural and waterproofing repairs across the property. Exterior brick and lintels showed wearing from exposure to the elements. The existing surface lot consisting of a PT slab with asphalt overlay showed visual signs of deterioration from years of heavy traffic. As a result, active leaking was experienced inside the bank’s operating office space. Inside, the subgrade garage exhibited drastic spalling of the concrete structure spanning from the deck, to columns, beams, etc. To address these issues, the scope of the project consisted of the following:

  • 25,000 sf of wall-to-wall partial depth hydro demolition and install of new concrete slab
  • 6,000 sf of full depth concrete repair
  • 8,000 sf of asphalt removal
  • 1,000 sf of topping slab R&R and hot apply install
  • 800 sf of new bonded overlay at teller window drive through
  • Post-Tension cable repairs
  • 300 lf of brick R&R to facilitate new flashing
  • New ADA ramp installation inside garage
  • 200 lf of new Aluminum Cap over Coping Stones
  • 500 lf of Mortar Joint Tuckpointing
  • Exterior Foundation Wall Waterproofing
  • 1,400 sf of penetrating brick sealer
  • 125 lf of expansion joint replacement
  • 100 lf of hydrophilic foam injection
  • 16,000 sf of SOG corrosion inhibitor treatment
  • 33,200 sf of new urethane traffic bearing membrane in the garage and on the surface lot

Waterside Towers Plaza

Waterside Towers Plaza

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Overview

Parking Structure and Plaza Deck Restoration Project

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Location: Washington, DC

Owner: UDR

Engineer: B Squared Engineering, LLC

Project Duration: 30 months

Waterside Towers is located in the Southwest Quadrant of Washington DC. The complex is comprised of three residential apartment towers, eighteen townhome apartments, a motor court and a centrally located parking garage structure. A pedestrian plaza is located above the garage. The plaza deck is accessed from two of the towers as well as from the motor court which is located one level below the plaza.  The townhome entrances are accessed from the plaza deck.

 

The scope of this project involved the structural rehabilitation of the pedestrian plaza above the garage, the motor court level of the garage and the basement level of the garage. The removal of the overburden and replacement of the waterproofing system of the plaza area was also included. All expansion joint glands were replaced at the plaza and suspended garage slab levels. During the course of the project, the work area and scope of work was expanded, to include the garage area under the motor court and the garage area under the townhouses.

 

The objective of the project was to complete the structural repairs, which would create some inconvenience to the residents, in the least disturbing manner. At the completion of the structural repairs and waterproofing work, a new outdoor space for the residents’ use would be created at the plaza level.

 

Awards: ICRI Baltimore-Washington Chapter 2018 Project of the Year – 1st Place