LIFTING&RIGGING
SITEREPORT
Dismantling four 465-foot
tall chimneys required
skilled crane operation by a
Guay Inc. team.
L
ate in2013, Sorel-Tracy,Quebec
province,Canada-basedGuay
Inc.was calledon todevelop an
engineering and liftingplan andprovide
the cranes todismantle four chimneys
that stood about 465 feet tall. The cranes
wouldneed to lift 75,000pounds at a105-
foot radius andwouldneed tobe able to
movequicklybetween each chimneywith
theboom fully erected.
“The challengewas to coordinate the
workbetween the cranes on site,” said
GuayVicePresidentGuillaumeGagnon.
At the jobsite,Guayprovided a700-ton
capacityTerexCC2800-1 riggedwith
452 feet ofmainboom, 78 feet of jib and
Superlift tohold the chimneypieces. The
cranewas equippedwith180metric tons
of counterweight and60metric tons of
carbody counterweight. Each chimney
was cut intoninepieces.
45
The second craneon the jobwas a
ManitowocM2250 riggedwith200 feet
ofmainboom, 200 feet of luffing jib and
120 feet of jib. This cranewas equipped
with95metric tons of counterweight and
27metric tons of carbody counterweight.
The cranewas riggedwith amanbasket
fromwhich aworker cut the steel on the
chimney.
“Weneeded toplanourwork reallywell
andassureprecisecraneoperationbecause
each crane’s boomwere sometimes really
close to eachother,” saidGagnon.
As each sectionwas cut and ready to
comedown, a three spreader-bar system
wasused to lift eachpiece.
A third craneonsitewas a250-ton
capacityGroveGMK6250L thatwasused
as an assist crane tohelpwith rigging the
othermachines and to tail the chimney
pieces at ground level.
■
MAY 2014
ACT
Chimney
challenge
After the craneswere
set up and rigged, the
sky highwork began
with aworker in aman
basket hanging from
theManitowocM2250
cutting the steel sections
of the chimney and then
the operator of the Terex
CC2800-1 bringing the
chimney section down.
With two chimneys down and the
third one about half way dismantled,
crews had gotten the hang of the
tediouswork at height.
