Do you sometimes worry about the lifting methods at some yards?

Steve C Cronin said:
I've always been concerned when they don't tether the slings together and this might be the cause of one or two of these "accidents". One of the later boats seems to have failed it's self-righting test!
http://www.youtube.com/watch?v=QWw2ARtMTi0*feature=related
Click to expand...

Some of those mishaps appear to be gear failures some are clearly due to overloading the crane.

Those where the boat simply slips out of the slings all have one thing in common. Spreader bars.


This is the way to lift a boat. Long slings and no spreader bars

DSCF0314.jpg



although the yard now has 'Hercules'


DSCF1135.jpg
 
VicS said:
Some of those mishaps appear to be gear failures some are clearly due to overloading the crane.

Those where the boat simply slips out of the slings all have one thing in common. Spreader bars.


This is the way to lift a boat. Long slings and no spreader bars

DSCF0314.jpg



although the yard now has 'Hercules'


DSCF1135.jpg
Click to expand...
Nearly all power boats so it's OK.

All due to incompetence by the operators.

Cranes are inherently more accident prone, more labour intensive and slower in operation than Travelifts but less capital-intensive.

One could take exception, if you'd had your "biscuit-box" hull-deck join opened up by non-use of spreaders, to VicS' assertion of the correct method of lifting.
 
A few years ago in Geneva I saw a small yacht being lifted out by a single strop passing through an open hatch and attached to an eye bolted directly to the keel. I think it might have been a Dehler, but not certain. Anyway, I thought it was a very neat and simple way to lift a yacht, and avoided any danger of strops slipping or damaging the driveshaft.
 
PhilipH said:
hm ... that'll be cranes then, not travel hoists. Lesson there.
Click to expand...

In the real construction industry all cranes , rigging, slings etc have to be regularly tested and certificated to a specified allowable load . in UK HSE would be on these guys like a ton of bricks let alone the insurance company .

Better check the small print in your lifting agreement with the marina. Ask to see the test certificates of the slings

Each lift is subject to a rigging study including calculations of load, angle of crane boom etc and on any grillage supporting crane outriggers before any attempt to lift .

How may times does a marina test its slings ?- I have seen quite few frayed ones in my time

And where are they stored when not in use ?
 
Ric said:
A few years ago in Geneva I saw a small yacht being lifted out by a single strop passing through an open hatch and attached to an eye bolted directly to the keel. I think it might have been a Dehler, but not certain. Anyway, I thought it was a very neat and simple way to lift a yacht, and avoided any danger of strops slipping or damaging the driveshaft.
Click to expand...

It's quite common for yards that dry-sail racers to insist on a single point for hoisiting. It means they can lift boats quicker. Usually the boat has to be moified to provide it, and as it can need a hole in the deck for the strop to pass through it can be less suitable for cruisers.
 
catmandoo said:
In the real construction industry all cranes , rigging, slings etc have to be regularly tested and certificated to a specified allowable load . in UK HSE would be on these guys like a ton of bricks let alone the insurance company .

Better check the small print in your lifting agreement with the marina. Ask to see the test certificates of the slings

Each lift is subject to a rigging study including calculations of load, angle of crane boom etc and on any grillage supporting crane outriggers before any attempt to lift .
How may times does a marina test its slings ?- I have seen quite few frayed ones in my time

And where are they stored when not in use ?
Click to expand...

That is only true to a point. In a yard environment, the rules are different, where the lift is considered a regular operation and does not require either a lifting procedure or competent person
 
hoisting

I'm with Charles Reeds caution.
The owners manuals of many modern boats of bonded/shell construction,which can be overwide e.g.Jeanneau and Beneteau,specifically require the use of spreaders and warn against methods where the strop is attached to the hook.
 
You must log in or register to reply here.

Share this page

Top