Load Cells Monitor Weight
As Cranes Operates
On Temporary Shoring Columns
orty 10-ton wireless
compression load cells
from Straightpoint monitor
forces on temporary shoring
columns used to support
two tower cranes during the Century City
Mall project on Santa Monica Blvd., Los
Angeles, California.
F
Two cranes from rental company Mr.
Crane, supplied by Morrow Equipment Co.,
are supported by the existing columns and
shoring posts, as load cells calcu-late total
mass and center of gravity of the cranes
and subsequent lifted loads.
Both cranes are located on an existing,
two-floor, underground parking gar-age. 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.