Beyond Surveying and Engineering


R.A. Smith National, Inc. - Newsroom

Allegheny Commons Park Pedestrian Bridge Renovation - Pittsburgh, Pennsylvania

by Tyler hauser 3. April 2012 08:06

R.A. Smith National provided 3D laser scanning services for the design and relocation of an existing dilapidated pedestrian bridge over the Norfolk Southern Railroad within the Allegheny Commons Park in Pittsburgh. 3D laser scanning processes were utilized to capture highly accurate point cloud data representing the structural aspects of the bridge.

The use of laser scanning to collect the needed as-built data was imperative. Typical survey locations were not possible based on existing site conditions, including the inaccessibility of the deteriorated bridge and railroad tracks that were located 25 feet below grade.

Unique scanner locations were critical to collecting enough data to replicate the bridge and also meet the railroad's clearance requirements. An existing 60-foot historic monument was also scanned to identify height, detail and plumbness.

A fully unified and registered point cloud data set was used to create an accurate TIN model for surface requirements. 3D line work was also extracted from the unified data to create the structural items of the bridge. Finally, a clearance report was created to illustrate the clearances to the arcing bridge above each set of the four railroad track systems below the bridge.

The final deliverable was utilized by Pashek Associates to coordinate the design and new location for the pedestrian bridge.

R.A. Smith National Wins Multiple Awards for Highland Road Bridge Over I-43, Mequon

by Karen Wiesneski 2. March 2012 03:22

R.A. Smith National – a multi-disciplined civil engineering and surveying firm – Brookfield, Wis., has received an Outstanding Highway Construction Award from the Wisconsin Department of Transportation, and a Top Projects of 2011 award from “The Daily Reporter,” for the Highland Road Bridge project over I-43 in the city of Mequon, Wis. R.A. Smith National provided construction management and inspection services for the project.

The Highland Road bridge is a six-span structure that spans four lanes of divided interstate and a mainline track of the Union Pacific Railroad (UPRR). The project included the replacement of the existing deck supported on concrete girders; the addition of decorative railing on top of a fieldstone-look, stained parapet wall; and the construction of outside bicycle lanes to serve the many bicyclists in the region.

The project was completed under a compressed schedule to meet the needs and requirements of Concordia University and the Union Pacific Railroad (UPRR). The UPRRs requirements included a four-week review and approval period for the deck removal system and associated demolition work above a mainline track. At the City of Mequon’s request, the project was completed one year prior to the inaugural season of a new Northwoods League baseball team based at Concordia University. The Highland Road Bridge project was successfully constructed in a two-month timeframe, June to August 2011, avoiding the closure of Highland Road when Concordia University was in session.

The Highland Road project is one of 30 projects that will be recognized at “The Daily Reporter” Top Projects awards dinner on May 3 at The Garage at the Harley-Davidson Museum, Milwaukee, Wis.

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Karen Wiesneski
(262) 317-3292
Fax (262) 901-2263

Chuck Stevens
(262) 317-3384

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