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Metal Buildings
#203653
10/17/11 09:50 PM
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Joined: Apr 2002
Posts: 32
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Information, suggestions on installations in metal ( block to 4 ft then metal to 30 ft) will be appreciated. I have 30 yrs experience in commercial/ industrial construction but not metal buildings. Pictures would be very useful. Thanks for any help anyone can provide.
Bill
Bill
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Re: Metal Buildings
[Re: sudsy4]
#203654
10/17/11 10:12 PM
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Joined: Jul 2004
Posts: 9,571
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Sounds like a regular EMT job to me. That is what I see everywhere.
Greg Fretwell
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Re: Metal Buildings
[Re: sudsy4]
#203655
10/17/11 10:28 PM
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Joined: Jun 2004
Posts: 1,273
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Get a Hilti for any direct mountings to heavy steel.
Typically you'll have Z channels in the horizontal. They make for natural EMT racks.
Be wary of 1/2" EMT -- somehow extra circuits always pop-up at the last moment.
Such jobs go much quicker if 3/4" EMT is the smallest EMT you employ.
Tesla
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Re: Metal Buildings
[Re: sudsy4]
#203656
10/17/11 10:30 PM
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Joined: Jul 2007
Posts: 265
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Last metal building I did was an auto repair shop. Ran a 4 inch wireway down the center and brought all the branch circuits out of it. Worse part is the exit from the trough, either end up using a cornering ell, or bending back to back 90s with the second one being overbent to match the slope of the roof. One hole straps work well for pipes going perpindicular to the ceiling joists, paralell runs usually end up on the sides of the beams, with one hole straps for support. Tek screws are good for the thin steel, the heavier beams have to be predrilled to prevent breaking the screws.
Jimmy
Life is tough, Life is tougher when you are stupid
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Re: Metal Buildings
[Re: sudsy4]
#203658
10/18/11 11:49 AM
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Joined: Jan 2005
Posts: 5,316
Cat Servant Member
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Metal buildings ... both a blessing and a curse.
"Minor" pipe runs can be done using beam clamps and Mineralacs. You'll still need to mind your bends, as the saddles around the uprights and doors add up.
Going vertical -if you're strict about it- means you first need to build a secondary support, as the Z-purlins are usually more than 10ft. apart.
You WILL need some horizontal runs across the ceiling. Again, the structural steel is far more than 10ft. apart; 25ft. is common. So .... cut to the chase ... you WILL need to construct a proper trapeze and hang it from the Z-purlins up there. Since 'extra' pipes keep appearing, design it plenty big.
Where you do need to mount to the sheet metal 'skin,' your best bet is the old-fashioned toggle screw.
As a 'design note,' plan on having a junction box at every column; sooner or later someone will need something there.
While it's a pipe-bending nightmare, try to place your receptacles between the flanges of the I-beams. That's the only way to protect them from forklifts, etc.
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Re: Metal Buildings
[Re: renosteinke]
#203670
10/18/11 10:15 PM
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Joined: Apr 2002
Posts: 32
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Thanks for info, will be asking further help I'm sure. Still in a mudd hole waiting on the Brikies at this point in the game. Biggest concern at moment is transition from block walls (flush mount in the block ) to the metal walls.
Bill
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