Mooring pile weld on extensions

[Trevorleach]

Been asked to investigate welding some extensions on top of the mooring piles where we keep our boat, as with some recent very high tides there was only 2 feet left to spare.

Now the piles themselves are approx 18 inches diameter with a 1/2 inch wall thickness, I thin there are over 50 of them, so I started to do some rough sums in my head, 4 feet of weld for one run around the pile, reckon at least 3 runs possibly more to bring the weld up to surface level, up on scaffolding 500 to 1000 yards from the car park, and I start to think bloody hell this wont be a small job.
I think even getting the extension pieces up there will be a challenge, never mind the prep work, bevelling, moving boats so they dont get sparked to death.

So any tips so I can justify my dont be daft we cant diy this comment, this is a pro job and will cost serious money?

 

[bricol]

I think you already have!

 

[Brad93]

Been asked to investigate welding some extensions on top of the mooring piles where we keep our boat, as with some recent very high tides there was only 2 feet left to spare.

Now the piles themselves are approx 18 inches diameter with a 1/2 inch wall thickness, I thin there are over 50 of them, so I started to do some rough sums in my head, 4 feet of weld for one run around the pile, reckon at least 3 runs possibly more to bring the weld up to surface level, up on scaffolding 500 to 1000 yards from the car park, and I start to think bloody hell this wont be a small job.
I think even getting the extension pieces up there will be a challenge, never mind the prep work, bevelling, moving boats so they dont get sparked to death.

So any tips so I can justify my dont be daft we cant diy this comment, this is a pro job and will cost serious money?

I'd quote for that.

But I'd need to know time frame. Relying on tides adds a lot of time to jobs and then there is the weather.

It won't be stick, I'll tell you now. It would be self shielded flux core.

Bevelling would be done either with a cold
Process or loose an inch of the existing pile and use gas to bevel.

We are used to working 400m from
Shore.

 

[Brad93]

You'd have to have a workboat on standby, 1 for rescue and 2 to hold equipment and power sources.

One with a crane would obviously be highly beneficial.

 

[Brad93]

This is us welding mooring ladders onto dolphins out in the Thames with a workboat and rope access.

 

[Brad93]

Some idea of the isolation.

 

[8ob]

A guy I know that does a bit of this type of work has a "U" shaped workboat with a travelling A frame and hoist on it. Makes easy work of things like this and it's very hard for those without it to compete.

Bob

 

[Brad93]

A guy I know that does a bit of this type of work has a "U" shaped workboat with a travelling A frame and hoist on it. Makes easy work of things like this and it's very hard for those without it to compete.

Bob

Blimey that sound like a good idea.

 

[8ob]

Blimey that sound like a good idea.

I will dig about and get a snap of it, it was made out of a load of old 2000ltr steel oil tanks welded together and its powered by an old Fordson major engine. You really couldn't get a more stable platform to work off than this thing. He pulled up a sunken boat from thirty odd feet down on the Solent for a lad that worked for me, positioned the workboat over the top of it , winched it up to just under the two hulls, powered to shore with this 30 footer underneath where a crane took over.

Bob

 

[nickk]

Some idea of the isolation.

View attachment 341018 View attachment 341019

Just downstream of dartford bridge?

 

[Brad93]

Just downstream of dartford bridge?

Upstream

 

[Pete.]

Working over tidal water - multiply the estimated costs by two and the timescale by four

 

[Brad93]

Working over tidal water - multiply the estimated costs by two and the timescale by four

Our Insurance is on a job-by-job basis when it comes to working over water, i think that tells you everything about such jobs

 

[Trevorleach]

I'd quote for that.

But I'd need to know time frame. Relying on tides adds a lot of time to jobs and then there is the weather.

It won't be stick, I'll tell you now. It would be self shielded flux core.

Bevelling would be done either with a cold
Process or loose an inch of the existing pile and use gas to bevel.

We are used to working 400m from
Shore.

I am hopefully back down there tomorrow, so will soon get accosted, so will gleefully let them know the expensive news!
Yes its tidal, Medway upstream of Rochester bridge
Thank you for the reply

 

[Pete.]

We chopped this one up just down the river. It used to be called jetty no8.

 

[Brad93]

I am hopefully back down there tomorrow, so will soon get accosted, so will gleefully let them know the expensive news!
Yes its tidal, Medway upstream of Rochester bridge
Thank you for the reply

Our workboats come from that way. I'll ask the boatman.