Photo from The Westin Bellevue
on Oct. 10.
The yellow crane, which would
collapse on Nov. 16, appears to be
tilting when compared to the white
crane in the foreground.
Investigators looked at photos,
and said the yellow crane appears
to be tilting 2 to 3 feet at the top.
Cranes are allowed to lean somewhat
-- about an inch for every 40 feet of height,
according to national standards.
That calculates to 5.25 inches of permissible tilt for the
210-feet high crane that collapsed
-- which is barely noticeable to the eye.
But the Bellevue crane, which heavily damaged three
buildings and killed a man in his apartment as it fell,
--appears as if it was leaning more than 3 feet at
The cab of the construction crane that collapsed on can be seen laying against
the Civica Office Commons building.
The crane was mounted on an unusual foundation of steel I-beams instead of
the customary concrete slab.
The crane’s tower was bent 15 feet above the foundation.
Firefighters and rescue personal clean up debris as they continue searching for
victims in the Plaza 305 building.
Dozens of bolts and welds failed where the base of the crane was secured.
The bolts connected the crane to large steel beams and a concrete slab in an
underground parking garage at a corner of the construction site.
L&I investigators noted that the crane sat on an unusual base.
It reportedly had been repositioned from a cement foundation that was
constructed when the project first began in 2001.
Crane operator control cab.
The operator suffered only minor injuries.
GAPS IN SAFETY CONTROLS
No safety inspections at the site prior to the incident.
Cranes must be inspected before each use, but it is
usually done by the operator.
A statewide crane-safety organization created after
the deadly 1994 Kingdome crane incident was no
A section of the
construction crane that
collapsed rests against the
front of the Pinnacle Bell
The victim was in a fourth-
floor apartment of the
High winds earlier in the week
may have weakened metal
fasteners in the base of the crane
Investigators also looked into whether the crane was
allowed to "weathervane," or swing freely, during
windstorms before the collapse.
A failure to do so by the crane operator would have put
more stress on the massive structure, experts say.
If the crane is not in weathervane mode, the torque
from the wind load on the boom can contribute, at least
in part, to failure.
The torque failure is similar to twisting metal until it
causes metal stress and break or bend.
Workers remove debris
the Pinnacle Bell Centre
A Second Crane in Bellevue has problems
Crane's cracks blamed on water, ice
Labor and Industries agency issues call for statewide
State investigators are blaming water and ice for the long
cracks that developed in the 300-foot-high tower
construction crane in downtown Bellevue that was
suddenly branded a safety hazard and dismantled over the
employees work to
stabilize a damaged
here, they pull
position to add more
clamps to the crane.
employees inspect the
damaged crane where
cracks were discovered
in downtown Bellevue
before it is dismantled.
Third Bellevue crane found to have flaw
A 225-foot tower crane in downtown Bellevue was
being repaired with welding torches after a 2-foot
"hairline" crack was found near the top of the tower.
Fourth Tower Crane Crack Identified
Neglect blamed for rash of crane failures
Maintenance and inspections have been lax, some