LIRR Post Avenue Railroad Bridge Engineering

Standout Features

McLaren Engineering Group provided bridge engineering design services for this $9.7 million project to replace the Post Avenue Bridge – which serves as a connector for the Long Island Rail Road. The 60 foot single span structure was originally built in 1914. Its two tracks were supported by steel plate girders, with a deck and reinforced abutments made of concrete.

The McLaren Difference: Applied Ingenuity

As Engineer of Record, McLaren was responsible for completing the final design by expanding preliminary work developed during the RFP process. McLaren designed the replacement of the two-track bridge with a three-track bridge, and increased the vertical clearance to 14 feet, to reduce outages. The abutments were replaced and strengthened, and the new bridge was replaced in 36 hours with self-propelled modular transporters (SPMTs). This project was awarded theĀ 2018 Project of the Year by theĀ American Society of Civil Engineers, Long Island Branch in May 2018.