Perma Ballast® Counterweights
BTI: Experienced, Versatile, Efficient
Charles River Bridge Extension
Counterweight ballast is an equivalent weight that balances a load.
Typical uses include elevator counterweight, crane counterweight, bridge counterweight and funfair ride counterweight.
A well-known example of a bridge counterweighted with Perma Ballast® is the Charles River Bridge Extension - part of Boston's Big Dig project.