CSX Bridge No. 1.63 of the “Highline” over Amtrak Yard Philadelphia, PA

Project Overview :

Garden State provided engineering for replacing 2 span existing CXST bridge carrying “Highline” over Amtrak yard in Philadelphia, PA. Spans 1 and 2 were 125ft and 102ft long and weighed 128 and 102 tons respectively. They consisted of 2 existing trusses spaced 8ft apart supporting railroad tracks about 50ft above the ground. Each existing span had to be demolished and new girder span installed within 3 day outage over the weekend when the tracks were out of the service. A presence of miscellaneous structures and utilities on the ground under the bridge as well as numerous overhead wires over the bridge imposed a challenge to operate the cranes and complete the assignment in such a short period of time. A very complex demolition/erection sequence was employed to bring new girder spans in and dispose existing trusses utilizing adjacent abandoned tracks.Garden State designed several different rigging configurations, verified that crane capacities were not exceeded during the construction and created demolition/erection CAD drawings.

Owner: PennDOT
Client: Cornell and Company, Inc.

Service: Survey

Sector: Transportation, Bridges/Tunnels, Railroad, Construction Services