The “City Ridge” project in D.C. calls for the construction of 652 residential units, a 150-key hotel, 153,000 sq. ft. of retail space and 62,000 sq ft. of office space. Its estimated date of completion is early 2022.
This project called for the preservation of the building structure that was originally built in 1956 and enlarged in 1962 and which most recently was the headquarters for Fannie Mae.
This project was the first in the nation that included use of the brand new Potain MDT 809. The crane stands at 214 ft. (65 m) and can lift 9.1 ton (8.2 t) at 262 ft. (79.8 m). This enables crane operators to perform heavy lifts over an existing historic building.
Schuster Concrete supplied most of the concrete for the project from a portable plant that was located in front of the existing building. The concrete was pumped through piping hundreds of feet around the existing structure to reach the back of the site. The place and finish was both massive as well as technical. The entire project was sequenced and modeled in advance by Schuster Construction’s in-house engineering team using Tekla Structures.
One of the main challenges with this project was the lack of access it had. The construction site was located behind the existing historic building which made getting anything in and out of it very challenging. We installed a full floor underneath the existing historic structure (new mini piles were driven to support the existing structure so that the existing foundations could be demolished and excavation could occur below the structure for the installation of the new level which now houses a Wegman’s grocery store). On top of that we also built 7 structures behind the existing building to complete what we have called now as City Ridge.