Replacement of a rare Hanover skewed bascule—The Hamilton Avenue Bridge, New York City, USA

ABSTRACT: The rarely seen Hanover skew bascule, also known as a knee-girder bascule bridge is a unique and complex movable structure in terms of both design and construction. The replacement of a movable bridge during an accelerated construction period is also an incredibly difficult task to engineer and construct. Either one of these constraints would make a project difficult to execute. For the Hamilton Avenue Bridge project in New York City, however, these two levels of complexity combined to create a one-of-a-kind project that would challenge the owner, designers and constructor to achieve a near impossible goal: to replace a skewed bascule bridge with a new, fully operational span in sixty-four days.