High Steel fabricated the structural steel and prepared the launch erection procedure for the replacement of the Rte 270 (Campbell Boulevard) truss bridge over the Erie Barge Canal in Amherst, NY.
A challenging project both in terms of fabrication complexity and engineering, the combination launch and float-in erection procedure for the truss is an example of accelerated bridge construction for a prefabricated steel bridge superstructure.
Pre-assembling the truss (with partial SIP decking) permitted abutment substructure construction activities to proceed concurrent with superstructure erection, thereby allowing contractor Oakgrove Construction to commence deck placement activities earlier in the construction season.
The three hundred foot long, seven hundred ton Warren truss was assembled on the south approach to the Erie Canal crossing (blocked to no-load profile). Upon assembly and after installing temporary struts at key locations to provide structural stability for the launch, load was transferred from full support at all panel points to four roller assemblies placed beneath reinforced primary connections.
The structure was then launched across the Erie Canal channel (Tonawanda Creek) in four phases:
In total, the structure was moved approximately 230ft total over four days.
The new bridge, which connects the towns of Amherst, Erie County and Pendleton, Niagara County, replaces a historic truss and better accommodates vehicular traffic, provides wide shoulders for bicyclists, and includes new sidewalks for pedestrians. The project also includes the reconstruction of the two intersections adjacent to the bridge, and a new entrance to the Erie Canal trail way.
Bridge Type: Truss
Steel Tonnage: 702 Tons
Steel Type: Grade 50
Coating: Painted (Three Coats)
Project Owner: NYSDOT
Contractor: Oakgrove Construction, Inc.
Detailer: Upstate Detailing, Inc.
Steel Fabricator: High Steel Structures LLC
Steel Erector: Hohl Industrial Services, Inc.