Load on bolts and Angle Steel 2

[Jack_]

Following my previous post on using bolts as a replacement for J-cups in a bench & squat power rack, I came up with a new design:

1. The red base is a UPN 100 welded old elevator base.
2. I use two of these as the poles to support the weight. The bases will be connected at the top back (near the wall) with an L angle, which would be bolted to the wall. A 2" wooden pole will connect the bases at the bottom front, just to prevent moving.
2. Steel angles (L shaped) 7mm thick, are bolted to the bases, one on each side, forming a support for the barbell to rest.

My questions are:
A. Is it a good setup.
B. Are M14 bolts enough (barbell should hold up to 250 kg, and accommodate drops from 2"-3" on the angles supporting it.
C. Are 2 bolts enough or should I use 3.
D. What is the minimal distance from the end of the UPN beam, that I can drill a hole and bolt in (the further I drill, the thicker the metal, so I want the less the better).
E. Should I replace the wooden beam at the bottom with a steel piece (harder for me).

Thank you guys for any suggestions

 

[Jack_]

 

[dik]

My questions are:
A. Is it a good setup.
Considering you are using something you have, it appears to be good.
B. Are M14 bolts enough (barbell should hold up to 250 kg, and accommodate drops from 2"-3" on the angles supporting it.
by M14, you mean 5/8" equivalent high strength A325 bolts... should be lots. I would not use A307 bolts. After assembly, try a drop from 8" or 12"... should easily withstand that type of abuse.
C. Are 2 bolts enough or should I use 3.
Two should do the trick... stronger and more rigid with 3...
D. What is the minimal distance from the end of the UPN beam, that I can drill a hole and bolt in (the further I drill, the thicker the metal, so I want the less the better).
I would use 1-1/2". You could use 1-1/4". You may need a tapered washer for the vertical beam section.
E. Should I replace the wooden beam at the bottom with a steel piece (harder for me).
Don't know what you're talking about...
Dik

 

[MegaStructures]

I will say, much better setup than before

 

[Jack_]

Thanks guys
I`m giving it a try
The only issue is, I figured out I might use M12 bolts instead. Should that be enough?
And I mean 8.8 strength (does impact load affects what strength I should use?)

 

[Tomfh]

These frames are better than the previous bolt design.

M12 8.8 bolts should be enough.

Make sure the frames are stable. You really don’t want them falling over sideways.

I’d also put something on the angle ends, as they’re quite pointy. You wouldn’t want to bang into them.

 

[dik]

I might use M12 bolts instead

I have a personal quirk about using fasteners less than 5/8". For anything with a load, I don't like them.

Dik

 

[12345abc6ttyui67]

Much better than previous (your first go gave me the heeby-jeebies). I'd use this one... You know, if I could bench anything...

 

[rb1957]

@dik … you'd hate (small) aircraft designs … #10 (3/16") is typical, 1/4" or 3/8" for heavy duty, anything larger is very unusual.

another day in paradise, or is paradise one day closer ?