- Thread starter Hitch
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Total height, 14.5metres. Base section 5.5m, top section, 9m Base plate 2m x 2m
Brackets are 100x50 PFC, and 150x75 RSA
Main mast is 350x350x10 SHS (106kg/m)
Lifting lugs, base plate and joint flanges are 20mm plate.
Base and flange gussets are 10mm plate.
About 2.3 tons in total.
Brackets are 100x50 PFC, and 150x75 RSA
Main mast is 350x350x10 SHS (106kg/m)
Lifting lugs, base plate and joint flanges are 20mm plate.
Base and flange gussets are 10mm plate.
About 2.3 tons in total.
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I was going to post a picture of a gate i made this morning; just cos i had the camera with me. But i can't top that. So i won't.
ps. 3rd picture down - what are the blue containers at the back?
ps. 3rd picture down - what are the blue containers at the back?
Nice work on that mast Hitachi.
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HM - what grade wire do you use to prevent swelling of any flush-ground welds after galvanising? We tend to use low-silicate, but lately have been getting swollen welds again after they come back from the galvanisers. The galvanisers aint changed anything, so summats up!
Anyone clever enough to give me the technical reasons why this phenomenon occurs?
Anyone clever enough to give me the technical reasons why this phenomenon occurs?
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Paul -
The wire i was using was some new Esab stuff, not sure on numbers. Its supposed to be cleaner and less fumey, not copper coated either. Not sure what it will be like after galving. To be honest, its not that important, on big stuff like that, an extra few microns wont harm when its bolted up.
Scarecrow -
Cut it up in a bandsaw. Virtually full capacity though
Getting the box square to the baseplate, Hang it from a jib on a forklift, then tack the corner thats furthest out of square to the plate, then concentrate one way, then the other.
The shape of the box section isnt really square, so put the square near to the radius of the box as possible as its the straightest part.
Check with the handy 18" More and wright square
The wire i was using was some new Esab stuff, not sure on numbers. Its supposed to be cleaner and less fumey, not copper coated either. Not sure what it will be like after galving. To be honest, its not that important, on big stuff like that, an extra few microns wont harm when its bolted up.
Scarecrow -
Cut it up in a bandsaw. Virtually full capacity though
Getting the box square to the baseplate, Hang it from a jib on a forklift, then tack the corner thats furthest out of square to the plate, then concentrate one way, then the other.
The shape of the box section isnt really square, so put the square near to the radius of the box as possible as its the straightest part.
Check with the handy 18" More and wright square
Rail_Head
Member
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- 61
HM - what grade wire do you use to prevent swelling of any flush-ground welds after galvanising? We tend to use low-silicate, but lately have been getting swollen welds again after they come back from the galvanisers. The galvanisers aint changed anything, so summats up!
Anyone clever enough to give me the technical reasons why this phenomenon occurs?
Welderpaul, what does 'swelling of flush-ground welds after galvanising' mean???
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Lets say you make up some tubular handrailing for example, you weld it up, and grind the welds flush. It goes into galv and when it comes back, the welds have now swollen up by 2 to 3mm. It is only where it has been welded; Areas that have been ground off, but not welded do not do the same. It is some sort of reaction during the galvanising process.
Drains
Yeah, nah.
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Paul, is it the welds swelling or extra galv adhering to the weld?
If it's the weld swelling, the only thing I can think is it's hydrogen coming out of the weld and sitting under the galv for some reason, but I seriously doubt that (seriously)
If it's the weld swelling, the only thing I can think is it's hydrogen coming out of the weld and sitting under the galv for some reason, but I seriously doubt that (seriously)
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2-3mm, are you sure Paul???
Our stuff usully 0.5mm or so, barely feel it.
The worst bit is when you do something complexed, vent it all internally and make a smart job of it...
Send it away, and the galvanizers have gassed more vent holes all over it. And charged for the priveledge.
Our stuff usully 0.5mm or so, barely feel it.
The worst bit is when you do something complexed, vent it all internally and make a smart job of it...
Send it away, and the galvanizers have gassed more vent holes all over it. And charged for the priveledge.
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http://www.weldingweb.com/showthread.php?t=14343
Googled it and found this thread - this is exactly the problem! - Non-believers you lot!
Googled it and found this thread - this is exactly the problem! - Non-believers you lot!
t'rusty duck
Member
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- 70
Welderpaul,
there's at least one believer out here in the quiet zone.
Usually, I avoid grinding down welds on the galvanized chassis which I make, but once dropped the drilling jig on back to front and realised the mistake too late. Tried to remedy this by welding the four discs just removed, each 60mm dia. through 3mm plate, back into the webs. (They were on the neutral axis of the rails and not in an area subject to high shear stresses so there would be no problems structurally. )
Even though they were just about invisible before galvanizing, it was a very different story afterwards as they were visible from 10 yards away...
Ken.
there's at least one believer out here in the quiet zone.
Usually, I avoid grinding down welds on the galvanized chassis which I make, but once dropped the drilling jig on back to front and realised the mistake too late. Tried to remedy this by welding the four discs just removed, each 60mm dia. through 3mm plate, back into the webs. (They were on the neutral axis of the rails and not in an area subject to high shear stresses so there would be no problems structurally. )
Even though they were just about invisible before galvanizing, it was a very different story afterwards as they were visible from 10 yards away...
Ken.
- Messages
- 6,338
2-3mm, are you sure Paul???
Our stuff usully 0.5mm or so, barely feel it.
The worst bit is when you do something complexed, vent it all internally and make a smart job of it...
Send it away, and the galvanizers have gassed more vent holes all over it. And charged for the priveledge.
I thought that was only the ones down here that do that, without a doubt they are some of the least helpfull misrable gits on the planet, Our local one has an amazing ability to bend most jobs you send to them
