- Thread starter Am333rcr
- Start date
Check with your local galvaniser as it won't always be obvious where they need holes. It will all depend on how they lift it. Also be aware they will just drill holes wherever they see fit without any thoughts to the use of the item. I made some heavy gate posts and they were going to drill straight into the top plate, fortunately we discussed beforehand. Don't leave any grease/oil on there and even marker pen can be an issue.
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Wiping down with some brake cleaner will be fine, no issue with surface rust but a quick buzz over with wire wheel or flap wheel is worthwhile.
The last thing I had done was a trolley I made from angle iron, I assumed as there was no box section it would be fine but they wanted holes in the corners where the shelves met the uprights.
They can even insist on holes where two surfaces meet if they are above are certain area.
The last thing I had done was a trolley I made from angle iron, I assumed as there was no box section it would be fine but they wanted holes in the corners where the shelves met the uprights.
They can even insist on holes where two surfaces meet if they are above are certain area.
DAPPH
as dyslexik as I'm daft
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Had all my galvanized stuff made free of slag & degreased with a standing up man doing the black grit sand blasting , I then cleaned it off with a hot soapy pressure washer ( VB ..vehicle wash ) & put it into the galv company …
There they then dropped the lot in a caustic bath for a while as part of their prepping process for hot dip heavy duty galvanizing.
There they then dropped the lot in a caustic bath for a while as part of their prepping process for hot dip heavy duty galvanizing.
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I've never degreased anything before it went for galvanizing in 20 years of fabrication. Just make sure it's free of paint, wax markers, and wipe off any cutting oil and swarf with a bit of rag.
You need vent holes at each end of hollow sections, one a drain and the other vents.
Depending on the size of the sections, 8mm is usually adequate on small box sections.
You need vent holes at each end of hollow sections, one a drain and the other vents.
Depending on the size of the sections, 8mm is usually adequate on small box sections.
Kent
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Never degreased padt a wipe over with a rag. Fast fill up is actually more important than gas venting btw. Slow fill can create distortion.
Drain out thats very effective and fast makes it cheaper because you won't be paying for trapped excess zinc (to this end i do all shs open rather than closed when possible)
Fast effective fill and drain are key to keeping everything straight (bending past usable is of course generally scrap )
Drain out thats very effective and fast makes it cheaper because you won't be paying for trapped excess zinc (to this end i do all shs open rather than closed when possible)
Fast effective fill and drain are key to keeping everything straight (bending past usable is of course generally scrap )
Revs1972
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You must have a posh galvanisers. They like to "drill" holes with a gas axe where we used to send it
