tray,trunking and conduit (steel)

[bright spark01]

hi guys im working for a contractor who is involved in alot of tray and trunking work and i havent really touched on this area since the training centre and would be greatful if any1 could highlight any key points in how to do afew off sets and bends. I cannot believe how little information there is on this topic on the web as it is such a big area of the industrial sector.thanks.

 

[bright spark01]

thanks guys some really good information yous have posted keep up the good work

 

[Ponty Massive]

Make your bend first, offer it up to the position, cut to size, cut the thread, weigh the scrap in !!!

 

[JD6400]

Over bend , cut and thread . Butchers !!!
Mind you thats how i tend to do it aswell ! lol

It will come with time , takes me a good day or two to get back in to the metal work if i ever have to cover for my other director on the plant room side !
Just ask to borrow some off cuts and the benders at night / weekend and you will be showing the boss how to do before long !
Good luck anyway mate.

 

[ecclescake]

to make sets in trunking needs a protractor to do it properly, or you can make two bits of card the same height as the trunking, and then use them as a template. tray is easy if its light/medium duty, as you can bend it over itself without taking the lip off, and then mark it. heavy duty tray is not as easy.

to be honest its all geometry.

you will pick it up.

on conduit the amount yougain on a bend are 20mm conduit is 50mm
25mm conduit is 67.5mm
32mm conduit is 80mm

i also posted a guide to conduit a while ago (i didnt write it), if you search the forum it will be here

Protractor? Card template? Never seen trunking done that way always used a tape measure and a marker.

 

[johnboy6083]

I'm talking about making perfect sets. I've been on jobs where we had to use protractor, even vertical sets on tray! it is the best tray install I have everseen, and I'm pretty good at metalwork myself. The only problem I have is time, I don't like using pre made bends, especially in plant rooms ect, but to make them properly takes time.
Is it just me that uses a grinder for tray and trunking?

 

[Knobhead]

Protractor? Card template? Never seen trunking done that way always used a tape measure and a marker.

That’s how I did it, foreman wouldn’t even get me a square even though they were stores stock.
At that time I was lucky in having a mate that was an absolute wiz at gas welding. Perfect sets and bends in trunking were near undetectable after spraying. But then we’d got the time to do it. One length of 6 X 6 I recall took a full day to put in, two sets and a 90 bend to go around a corner with a stanchion running up it. 30 welds in one length including the lid. The foreman wasn’t impressed about the time, but impressed enough to phone the site engineer to come and have a look at it.

 

[malcolmsanford]

It is impossible to do a proper conduit bend without this precision piece of equipment ...................the hickey block

But loved the vice on here with the spirit level ......................saves notching the former I suppose, which if it was a used by many a sparks could get quite confusing .............or us left handed ones just made it more fun.

 

[Guest 004]

Over bend , cut and thread . Butchers !!!
Mind you thats how i tend to do it aswell ! lol

Perfect every time, makes me laugh when I see a bend that is too short, and the 'butchers' then put a lock ring or two on, and try and stretch it, lol,

 

[ZOLA83]

have u anny diagrams on how to do off sets on trunking please or side sets thanks would help thanks