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what is the max length for galvanizing and transportation in US

what is the max length for galvanizing and transportation in US

what is the max length for galvanizing and transportation in US

(OP)
i have a 50 ft beam.  

RE: what is the max length for galvanizing and transportation in US

(OP)
it's a monorail beam that's why it's that long. support is at the top.

RE: what is the max length for galvanizing and transportation in US

You can transport a 50 beam with little extra effort, check with a trucking company.  You can galvanize a 50 foot beam by either finding a company with a large tank or by dipping it twice.  Check with a galvanizing company.

RE: what is the max length for galvanizing and transportation in US

Agree...Length varies with state, but special permits can be obtained for over-length. 50' is not much if any over typical max length.

RE: what is the max length for galvanizing and transportation in US

(OP)
am trying to decide if it's better to transport it at 50 ft or field weld splice it.

what do you think?

RE: what is the max length for galvanizing and transportation in US

Field welding material that is galvanised can be problematic

Dik

RE: what is the max length for galvanizing and transportation in US

I would transport the beam in one piece.  I don't really like field welding on galvanized members.  The welds are not really protected by the galvanizing, and the cold galvanizing paint they use to touch up the welds is not as good as the original galvanizing.

Your local steel fabricator should be able to advise on shipping.  They must do it all the time.

RE: what is the max length for galvanizing and transportation in US

50ft should not be impossible, it just might not be convenient or local.

Here's another recent thread discussing this:

http://www.eng-tips.com/viewthread.cfm?qid=277967&page=9

PSlem has a great link to the American Galvanizers Association website.

RE: what is the max length for galvanizing and transportation in US

(OP)
similar question.

what should i put on the structural notes since field welding galvanized steel could be problematic?

thanks,

RE: what is the max length for galvanizing and transportation in US

(OP)
Reading our notes again. It says all weld metal shall be equivalent to base material in strenght, CORROSION RESISTANCE....

i guess this is good enough.

RE: what is the max length for galvanizing and transportation in US

Perhaps your notes should just flat not permit field welding of galvanized material.

 

Mike Halloran
Pembroke Pines, FL, USA

RE: what is the max length for galvanizing and transportation in US

Railroads routinely transport 80' beam sections - so 50' is available - might have to wait awhile as most service centers cut them to 40'.  There is a galvanizer either in western Kansas or Nebraska that advertizes a tank longer than 80'.  Again it is doable.

Just find a local supplier or Google it and you will find all kinds of sources.

Do what others suggest - do not field weld it.

RE: what is the max length for galvanizing and transportation in US

(OP)
no choice.
boss wants it cut. part of the beam will go inside existing equipment structure. may encounter erection problem.

thanks anyway.  

RE: what is the max length for galvanizing and transportation in US

Not that it matters now....

We ship long pipes all over the country.  Our standard length before things get difficult (extra cost, permits, etc) is 53'.  50' should be no problem.   

RE: what is the max length for galvanizing and transportation in US

AWS WZC "Welding Zinc-Coated Steel" (formerly AWS D19.0-72), (American Welding Society) covers welding of galvanized steel.  
Basic requirements: Remove galvanizing at least one inch from weld location, or specify that this area not be galvanized.  When welding is completed, clean and coat with zinc-rich paint.

RE: what is the max length for galvanizing and transportation in US

Zinc-rich paint is not going to survive passage of the crane trolley for long.  Repainting the splice should be listed as a regular maintenance item.
 

Mike Halloran
Pembroke Pines, FL, USA

RE: what is the max length for galvanizing and transportation in US

I'll join the party, this is what my notes say regarding welding galvanized surfaces.

For galvanized coating, repair field damage and site welds with two coats of a two pack epoxy primer polyamide zinc-rich paint coating containing a minimum of 92% zinc dust in the dry film which which will be built up to 75 micrometres minimum.

Don't ask me what that actually means.

RE: what is the max length for galvanizing and transportation in US

Kikflip

Not that it matters but if I get it well, your notes refer to the case of repairing the damaged galvanizing part by applying paint (epoxy primer)which means that said part will be coloured and this may not be accepted in some cases.

In Europe we use open trucks for transporting beams, rails etc. longer than 40'- it's not everyday routine but not so rare either.   

 

RE: what is the max length for galvanizing and transportation in US

Standard truck trailers these days are 53' long so a 50' piece is sort of a nobrainer.  I used to work for a glulam manufacturer many years ago and we routinely shipped 75'-85' pieces half way across the country (with escorts).  A year or so after I left the company they had a local move of some beams that were in the 150' length.  That would have been interesting to see.

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