U.S. General Services Administration (GSA)
Mills & Schnoering Architects
Wiss, Janney, Elstner Associates
The Tradesmen Group
Location: Milwaukee, WI
Industries Served: Restoration
Equipment: Pedestrian Canopy, System Scaffold Stair Towers, System Scaffolding
Services Provided: Drafting & Design, Engineering, PE Stamp
Scaffold Engineering: Universal Manufacturing, DH Charles Engineering
Shoring Engineering: GZA Geoenvironmental
General Services Administration, Buildings and Facilities Profile:
Federal Building and U.S. Courthouse, Milwaukee
Wisconsin Eastern District Court, Final Tenant Presentation Video:
Federal Building and U.S. Courthouse, Milwaukee Façade Project
Abatron, Project Profile: Restoration Spotlight:
Milwaukee Federal Building and U.S. Courthouse
Sponge-Jet, Project Profile:
The Restoration of the Milwaukee Federal Building and U.S. Courthouse
U.S. General Services Administration, Apr. 4, 2018:
Historic Milwaukee Courthouse Gets Makeover This Spring
The building’s most iconic feature also presented some of the most significant challenges for our engineering team, almost 200-foot height requirement, 26 total working levels, 12 working levels above roof elevation of main building, 360-degree access to tower façade.
In order to achieve the height requirement, we needed to reshore North Porch and its supporting structure, engineer a beam structure to rest on top of porch roof to support erection of universal system scaffolding up the façade of north inset elevation.
TTG required 360-degree access above severely sloped roof, team engineered beam structure spanning the main tower roof more than 90-feet in the air, surrounding the feature on three sides. This framework allowed hanging of additional working levels below the beam to access otherwise impossible to work on sections tower façade, each platform tapering in size to match roof angle of decent.
Wind-loads produced by working enclosures required high-level engineering calculations and load analysis to ensure safe working conditions, PE stamped prints indicate restricted areas and maximum levels of sound curtain that can be installed at any given time.
The building remained operational throughout the restoration process, UMC designed and engineered pedestrian canopy scaffolding rated in excess of 150psf to serve as overhead protection for the general public using the north porch among building entrances and exits.
The edge and stone deterioration found on the turrets of the North Building was primarily the result of rusty anchors and the more than 100-year old iron bolts securing the gutter being drilled directly into the granite itself.
First TTG had to repair and repoint the granite using the dutchman process, then reframe the gutter structure using a non-deteriorating composite that could be easily fitted to the radius of the turret.
A talented team of metal fabricators recreated the profile of the original led-coated copper gutter, delivered those components to the site, and installed a new copper cladding on the composite framing before reattaching the gutters with stainless steel fittings that will not corrode over time.
At approximately 80-feet above street level, this work intensive aspect of the project was accomplished from a safe and stable platform constructed using Universal system scaffolding and an integrated material hoist.
Retooling is a process, especially in areas which are highly visible, where The Tradesmen Group will physically chisel and retouch the details of the stone by hand. It’s a step further than the micro-abrasive treatment, working to restore the stone it its original appearance and texture.
This treatment is particularly labor intensive treatment and requires close, immediate access to be accomplished effectively. The working platforms designed and engineered using Universal system scaffolding provided The Tradesmen Group the stability they need to accomplish their objectives.