

$60 STRAP IS THE REASON 7 PEOPLE LOST THEIR LIVES ON EAST SIDE
CRUCIAL PIECES IN CRANE COLLAPSE
New York Post. May 16, 2008
-- Federal investigators yesterday displayed frayed nylon slings
and other evidence showing the physical forces involved in the March 15 East Side crane collapse that killed seven people.
Officials aren't saying anything about the investigation being led by the federal Occupational Safety and Health
Administration, which is expected to take months.
But a construction-industry expert said the evidence suggests
crew members working to raise the height of the 20-story crane at 303 W. 51st St. may have mishandled the slings they were
using to lift heavy, steel crane parts.
The slings - each rated to hold about 5,000 pounds - sell for about $60
apiece.
The workers should have padded the sharp-edged steel parts being lifted by the slings, the expert said.
Without the padding, the expert said, the steel edges could easily have cut the nylon.
"It wasn't rigged
properly around the sharp corners," the expert said.
If the steel edges hadn't cut the nylon, the sling
was more than strong enough for the job.
The 5,000-pound safety rating of the nylon straps is just a fraction of
their actual capacity. If the straps are in proper condition, they should have a breaking point of around 25,000 pounds, said
the expert.
The accident occurred while workers were hoisting a six-ton steel collar wrapped around the crane's
tower. Once the collar was in place, it would have been secured to both the tower and the building.
When the straps
broke, the collar slid down the outside of the tower, smashing through other collars that braced the crane to the building.
The crane then toppled across East 51st Street. Six construction workers were killed, including the crane operator
and some of the workers involved in the operation.
A woman was killed when the toppling crane smashed through an
apartment building on East 50th Street.
The workers involved in the dangerous "crane jumping" operation
were required to be licensed by the city as climber/tower riggers.
But some in the construction industry argue
that crane-jump crews should also include master riggers, who are experts at hoisting heavy loads.
City regulations
do not require master riggers to be present during crane jumps.
OSHA's display of evidence yesterday was aimed
at lawyers and investigators involved in the case.
"It was primarily an opportunity for other entities involved
to take a look and have a chance to see it," said agency spokesman Ted Fitzgerald.
Some who attended were
reluctant to draw conclusions about what the evidence meant, and said more investigation of the tragedy was needed.
"All we were looking at was a lot of rigging from various places in the construction layout," said Ed Steinberg,
a plaintiffs' lawyer.
"Do I see a strap that is frayed? Sure," he said. "But to say how all
that worked in all, I couldn't grasp."
The seven people killed in the crane collapse are among 15 who
have died in construction accidents in the city so far this year.
Trailer Safety Chain.
The
NZ Land Transport Safety Authority Standard 5467 for safety trailer chain states that the standard requires that the trailer
chain must have a minimum breaking load of at least twice the gross laden trailer weight.
Why do we only have 8mm trailer
chain now, and not 8mm and 10mm as previous?
The reason is simple, we only need one size (8mm)
The regulations
state the following:
- (A) Trailers with a gross laden weight of up to 2,000 kg require a
single safety chain.
- (B) Trailers with a gross laden weight of between 2,000 kg and 2,500 kg require twin crossed
safety chains unless fitted with a breakaway brake.
- (C) Trailers with a gross laden weight of 2,500 kg and up to 3,500
kg do not require safety chains as they must have a breakaway brake fitted.
In the cases of both (A) and (B) above,
our new 8mm Trailer Safety Chain will fully meet these requirements.
Bridon Cookes 8mm long link safety chain is the
only product Cookes is aware of in this country that fully complies with N.Z. Standard 5467.
Our new chain not only meets this requirement, but is also
clearly marked with both the Standard number (5467) and the Maximum gross laden trailer weight (2.0) tonne. Further, it is
marked with a batch number to ensure traceability if ever required.
The previous 8mm and 10mm chains were manufactured
to meet Australian Standard 4177. This standard only requires a breaking load of 1.5 times the gross laden trailer
weight, and is therefore not deemed acceptable for use in N.Z. according to the LTSA.
All long link trailer safety
chain must be fitted with a 11mm hi-load, tested and certified bow shackle - many people are still using untested commercial
galvanised shackles.
Bridon Cookes New Plymouth can supply long link safety trailer chain cut to 400mm and fitted with
a 11mm bow shackle to meet LSTA Standard 5467. (P.O.A)