Hope everyone is having as nice a Saturday as we are!

Well, the specification for the new gym machine didn't match by 5 cm in height.

Not giving up, so I'm considering whether it's possible to scoop out the basement ceiling, which is the poured concrete floor of the level above. It's a single-story brick house with a finished basement from the 70s.
Ceiling height is 209 cm, the machine is 213-214 cm.

It's the top component of the machine that has an angle of 10-20 degrees up towards the ceiling and is made of square steel. So the dimension affecting the ceiling is 4 x 20 cm, which shouldn't really affect the structure at all.

So the idea is to mill a channel of 4 x 5 x 20 cm (WxDxL).
Groove milling and chipping/breaking away. Mask the area with construction plastic and a construction vacuum to minimize dust.

But when do you hit the reinforcement, and what tools are best suited for the job? I assume I'll need to rent.
 
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Not easier to modify the machine? Do you have a picture of it?
 
The machine might be standing on small feet that can be removed or cut off?

I wouldn't attempt to mill/chop away material from the underside of this arch.
 
Multi-function gym machine for strength training with pulleys, weight stack, seat, and padded supports, designed for various exercises including rowing and pulling.
 
It simply cannot be changed in the construction in an easy way. If it is to be cut, all of them must be cut, and that is not possible since the chrome rods that the weights move on have a thread at the top.

It simply becomes too large an intervention that can affect too many variables.
 
The easiest might be to buy a new house ;)
 
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If the spec isn't correct, you should be able to exchange it, right? You haven't received what you thought you were buying.
 
Jonatan79 said:
The easiest is probably to buy a new house ;)
Or use another room in the house :)
 
I think I can see quite clearly that it should be possible to reduce the height of the "machine" by a few centimeters.

And sawing with a hacksaw is good training for the arm muscles :)
 
bonnier said:
Or use another room in the house :)
Or just carry out a well-thought-out intervention works too. That's the goal like!
 
KnockOnWood said:
I think I see quite clearly that it should be possible to reduce the height of the "machine" by a few centimeters.

And sawing with a hacksaw is good training for the arm muscles :)
If you are going to cut anything at all, then everyone must get an equally precise cut. Which involves a lot of work, but it can be done.

Is it really that bad to mill that little groove in the basement ceiling?
 
Can't you just cut the "stolpen" and drill a new screw hole? (Very possible that there is some detail not visible in the picture preventing this...)

Best regards, Magnus
 
K
I guess that the vault is under-reinforced, and in that case, I wouldn't dare to chisel in it just any way without consulting a structural engineer. However, you are likely to have a floating concrete floor without any load-bearing function if it's an older house (which it sounds like, considering the height), then maybe you can chisel into the floor and make a cutout for the machine in the floor instead?
 
Have I understood you correctly that it's the beam running from the weight stack to the bar that points slightly upwards? Is the entire height of the beam used for the cable/wire or similar, or is there air at the top? If so, can the top edge of the beam be cut off? The corner in front of the cable wheel's attachment has no significance for the beam's strength, and a small bit behind the cable wheel could probably be taken too, since the beam must be dimensioned for the highest moment which is at the post. It might even be possible to move the cable wheel down a bit if needed as it seems.

I would extend the threads in the weight stack rods and cut the standing post. It’s not that critical – there are threads in the rods so it must somehow be adjustable.

Consider how you will set up the machine too if you can't assemble it while standing. The travel dimension is the measure from the top of the beam directly to an imaginary line between the foot by the seat and the foot under the weight stack. It won't be much longer than the machine's height when upright, but there will be some difference.

If you're planning to modify the building, it’s likely not a problem as long as you don’t interfere with the reinforcement. The underside of a slab has tensile stress, which concrete doesn't handle very well unless it's reinforced. Up to the reinforcement, the concrete mostly serves as protection for the reinforcement. However, I don't have knowledge of how much concrete is usually outside the reinforcement in a house. On quays, they typically have 50mm to protect the concrete from water, so in a house, I guess it's considerably less...
 
F
KjellTimell said:
I guess the vault is reinforced at the lower edge and in that case, I wouldn't dare to drill into it without consulting an engineer. However, you likely have a floating concrete floor without any load-bearing function if it's an older house (which it sounds like, considering the height), so maybe you could drill into the floor and make a recess for the machine instead?
Absolutely agree. Leave the ceiling alone, there's probably reinforcement 3-5 cm in.

By the way, I think the machine looks fully editable.
 
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