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Old 06-20-2021, 02:25 PM   #1
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Holes in frame flange - would you be concerned?

So it looks like the stabilizing jacks on my trailer were replaced, and to add the new ones, they drilled some new holes, leaving excess empty holes in the bottom flange of the I-beam. I'm assuming extra holes aren't good, but are they a concern? There's 2-3 extra empty holes on each corner, some 1/4" some 3/8.

Should I see if a welder can fix this? Or is it really not a concern?

https://imgur.com/a/S0qUKj6

Thanks!
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Old 06-20-2021, 04:32 PM   #2
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Me personally, the tiny holes wouldnít bother me. If they bother you, have they filled. Welding on the frame may be as bad as the holes, due to the heat.
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Old 06-20-2021, 07:13 PM   #3
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prime and paint
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Old 06-20-2021, 07:18 PM   #4
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Holes at the ends of a frame rail are rather inconsequential. Very little weight out of the total is carried there. Also, the bottom frame flange is in "compression" while the top flange is in "tension" while carrying the load. Holes are less problematic on the bottom.
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Old 06-20-2021, 07:32 PM   #5
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prime and paint
Yep.
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Old 06-21-2021, 01:00 PM   #6
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I'd at least caulk the holes to keep water out of them.
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Old 06-21-2021, 02:59 PM   #7
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prime and paint
X2
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Old 06-22-2021, 06:30 AM   #8
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Originally Posted by TitanMike View Post
.............the bottom frame flange is in "compression" while the top flange is in "tension" while carrying the load. ..............
I think that is backwards Mike, the top being pushed on is trying to get smaller, so it is in compression. The bottom, when bending downwards is trying to stretch so it is in tension.
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Old 06-22-2021, 08:06 AM   #9
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I think that is backwards Mike, the top being pushed on is trying to get smaller, so it is in compression. The bottom, when bending downwards is trying to stretch so it is in tension.
Correct
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Old 06-22-2021, 08:14 AM   #10
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They're lightening holes and since the trailer now weighs less it will tow better.

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Old 06-22-2021, 09:01 AM   #11
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I think that is backwards Mike, the top being pushed on is trying to get smaller, so it is in compression. The bottom, when bending downwards is trying to stretch so it is in tension.
I would think it would be both, depending where on the frame. Ie, between the hitch and the wheels, the top would be compression and the bottom would be tension as both "ends" of that segment are being supported. But behind the wheels would be the opposite as the hanging end is pulling down, making the top tension, bottom compression, no? But I'm no engineer.
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Old 06-22-2021, 09:09 AM   #12
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Correct

I think you are both right


When looking at the weight on top of the frame

top could stretch and bottom could compress


When looking at the force of the jacks on the bottom of frame
bottom could stretch and top could compress


I am dizzy now and have a sick headache.
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Old 06-22-2021, 09:30 AM   #13
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The holes you have circled are the result of sloppy work. The bolts have been removed at some point. Take a caulk gun and force a sealer into those holes to prevent moisture penetration. The holes in the metal plates are for multiple purpose applications.
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