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Old 05-07-2019, 08:14 AM   #41
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We just call them "pan heads" here.

I don't think I've ever heard some one call them zip screws or zippies.


Technically the type of screws we use are not pan heads though, they are "truss head"

Around here we call those wafer screws

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Old 05-07-2019, 08:17 AM   #42
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Something like this

Just screw the box to the hole in back of the clamp

Easy peesy japaneesy

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Old 05-07-2019, 09:31 PM   #43
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I've mounted boxes to beams before with self tappers but you usually burn 2 or 3 before one of them threads in.
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Old 05-07-2019, 10:44 PM   #44
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These babies. Make sure they are #12 or larger so they don't snap when they are threading in. Hex is better than phillips unless you like stripping the heads and snapping the tip on your impact driver. The self tapping head has to be at least as long as the steel is thick or you are just going to snap the tip off in the hole.

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Old 05-08-2019, 11:32 AM   #45
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Quote:
Originally Posted by freeagnt54 View Post
We just call them "pan heads" here.

I don't think I've ever heard some one call them zip screws or zippies.


Technically the type of screws we use are not pan heads though, they are "truss head"

Yes those pictured are truss head tek screws. Probably #8 x 1/2"
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Old 05-08-2019, 11:38 AM   #46
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Zip screws:




https://www.toolbarn.com/malco-hw8x1...RoCUw0QAvD_BwE
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Old 05-08-2019, 01:18 PM   #47
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I've mounted boxes to beams before with self tappers but you usually burn 2 or 3 before one of them threads in.
Where I'd have a dozen mounted with the beam clamps....99 could get 2, possibly 3, so he's still ahead if he used the correct parts

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Old 05-08-2019, 01:56 PM   #48
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Grabbed some scrap EMT shorties, attached it to the beam, U-bolt, done.
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Old 05-08-2019, 01:58 PM   #49
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Grabbed some scrap EMT shorties, attached it to the beam, U-bolt, done.
I have no idea what you are saying here. How did you do it?
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Old 05-08-2019, 02:55 PM   #50
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I find it fascinating it's taken three pages to figure out how to mount a box to a beam...lol
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Old 05-08-2019, 03:01 PM   #51
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I find it fascinating it's taken three pages to figure out how to mount a box to a beam...lol


But it's good though. Now I know that I could get self tappers for thick steel, and will put some on the truck.
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Old 05-08-2019, 05:32 PM   #52
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Quote:
Originally Posted by 99cents View Post
Grabbed some scrap EMT shorties, attached it to the beam, U-bolt, done.
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I have no idea what you are saying here. How did you do it?
If you attach the EMT to the beam, you can u bolt the box to the EMT, but you have the same question, what do you mount EMT to the beam with?

Unless ... did you cut the pipe to wedge between the flanges of the beam?
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Old 05-08-2019, 07:38 PM   #53
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But it's good though. Now I know that I could get self tappers for thick steel, and will put some on the truck.
Never look around when you go in Fastenal or Up Tite?
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Old 05-08-2019, 07:40 PM   #54
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If you attach the EMT to the beam, you can u bolt the box to the EMT, but you have the same question, what do you mount EMT to the beam with?

Unless ... did you cut the pipe to wedge between the flanges of the beam?
With seismic code requirements you'd still need to clamp down the EMT
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Old 05-08-2019, 07:45 PM   #55
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Never look around when you go in Fastenal or Up Tite?
I have seen self tappers with long drill tips, but I never really thought that they could be used on thick building steel like I-beams.
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Old 05-08-2019, 09:05 PM   #56
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Grabbed some scrap EMT shorties, attached it to the beam, U-bolt, done.
I cut a piece of 1” EMT about 18” long. Attached the octagon box to it with a U-bolt on the ground. Went up, banged a couple of conduit clamps onto the beam, attached the pipe, done.
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Old 05-10-2019, 11:04 AM   #57
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I cut a piece of 1” EMT about 18” long. Attached the octagon box to it with a U-bolt on the ground. Went up, banged a couple of conduit clamps onto the beam, attached the pipe, done.
Is that a UL listed assembly?....lol
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Old 05-10-2019, 12:10 PM   #58
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Is that a UL listed assembly?....lol
It has 99 cents worth of approval .
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Old 05-10-2019, 01:13 PM   #59
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What hasn't been said yet is the various self tappers shown have a tendency to shear off while drilling into steel beams. Best to drill a pilot hole with a plain ole steel drill bit first before sending in a self tapper into the beam unless you like moving the stock to a new place and trying again........ It can be a real pain if exact box placement is really critical and the screws snap off in the spot where the box has a hole for securing.
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Old 05-10-2019, 02:26 PM   #60
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But it's good though. Now I know that I could get self tappers for thick steel, and will put some on the truck.
Same. I plain never knew they existed.
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