Engineer memo Chapel Ave Bridge.pdf

The document is a memorandum from Boswell Engineering dated November 22, 2023, addressing crane travel specifications for the Chapel Avenue Bridge in Port Liberte. The memo provides detailed weight and crossing guidelines for a GMK3060 Crane, specifying that for everyday two-way traffic, the bridge should be posted for 20 tons, aligning with the Federal Highway Administration's standard. For controlled single-vehicle passage, the bridge can support vehicles up to 36 tons without structural damage.

The memorandum outlines specific conditions for crane movement across the bridge: the total weight of the GMK3060 Crane with additional equipment is 74,419 lbs (37.21 tons), which exceeds the single lane travel capacity. To mitigate risks, the memo prescribes four key conditions: removing counterweights to reduce crane weight, allowing only single vehicle crossing, driving at a crawling speed of approximately 5 mph, and traveling along the bridge's center-line, which should be marked.