Extreme Crane Situation
Load Cells Monitor Weight as Traveling Cranes Operate on Temporary Shoring Columns
Two cranes from rental company Mr. Crane, supplied by Morrow Equipment Co., are supported by the existing columns and shoring posts, as load cells calculate total mass and center of gravity of the cranes and subsequent lifted loads.
Both cranes are located on an existing, two-floor, underground parking garage.
An early rendering shows a cross-section beneath the traveling crane. This is an initial concept and not accurate to final installation but it shows where the load cells were placed at the top of a sampling of posts on each level.
A Liebherr 630 EC-H 20 Litronic is stationary, while a Liebherr 542 HC-L18 Litronic operates on rails and traverses the length of the project in stages.
The cranes used to erect them on the garage were a Liebherr LR1300 crawler crane and a Liebherr LTM1400-7.1 hydraulic truck crane. There is a third tower crane—another 630—on a standard foundation on the ‘Macy’s side’ of the project.
Each crane is supported from the deck down to the final slab of the structure using jackscrew shoring posts on both floors of the car park, positioned at each of the four corners of the stationary crane, and along the pathway for the traveling crane.