Good day everyone!
I am planning to install a two-post lift in a newly built garage. It is a 3.5-ton lift, suitable for typical mid-sized passenger cars. The garage is already completed; only the screed [and a few other minor details] are still missing.
Regarding the screed, I have some questions about whether anything special is required:
- Does it need to have a special thickness?
- Or does it need to be reinforced in a specific way?
- Should it be a flowing screed or even a composite screed?
The concrete slab, which serves as the garage foundation, has a minimum thickness of 25cm (10 inches), and in most areas even 30cm (12 inches). The screed will later be covered with an industrial flooring finish.
The lift manufacturer does not specify any special requirements for the screed, only that the concrete foundation must be at least 20cm (8 inches) thick.
I would really appreciate any final advice, as I still have the chance to adjust or change my choice. I have currently planned a flowing screed, installed on a plastic vapor barrier, with a thickness of about 7-8cm (3-3¼ inches).
Do you think this would be suitable?
Thank you very much in advance for your help!
Best regards, Froma
I am planning to install a two-post lift in a newly built garage. It is a 3.5-ton lift, suitable for typical mid-sized passenger cars. The garage is already completed; only the screed [and a few other minor details] are still missing.
Regarding the screed, I have some questions about whether anything special is required:
- Does it need to have a special thickness?
- Or does it need to be reinforced in a specific way?
- Should it be a flowing screed or even a composite screed?
The concrete slab, which serves as the garage foundation, has a minimum thickness of 25cm (10 inches), and in most areas even 30cm (12 inches). The screed will later be covered with an industrial flooring finish.
The lift manufacturer does not specify any special requirements for the screed, only that the concrete foundation must be at least 20cm (8 inches) thick.
I would really appreciate any final advice, as I still have the chance to adjust or change my choice. I have currently planned a flowing screed, installed on a plastic vapor barrier, with a thickness of about 7-8cm (3-3¼ inches).
Do you think this would be suitable?
Thank you very much in advance for your help!
Best regards, Froma
Hello,
to be honest, I can't imagine that you can properly secure the lift platform in the screed. Screed is not designed to carry significant loads. Also, the thickness of 70 mm (3 inches) will likely not be sufficient to hold the anchors firmly. In other words, you will probably need to anchor directly into the concrete slab.
Then there is the question of whether the screed can withstand the compressive loads. Unreinforced self-leveling screed probably cannot.
Alternatively, you can install the lift platform "floating," meaning the load-bearing bolts pass through the screed directly into the concrete, and the lift is only screwed onto these bolts. This leaves a gap of a few millimeters between the platform and the floor, so it does not touch the "floor" at all. This is how industrial equipment is installed to avoid problems with uneven floors. Your issue here is the screed thickness, which determines the free length of the bolts. This free length should ideally be no more than 1–2 cm (0.4–0.8 inches), which will be difficult to achieve with your screed.
In industrial halls, screed is usually not used for a good reason. Instead, a thick concrete slab is poured, which is then properly smoothed and sealed.
Best regards,
Andreas
to be honest, I can't imagine that you can properly secure the lift platform in the screed. Screed is not designed to carry significant loads. Also, the thickness of 70 mm (3 inches) will likely not be sufficient to hold the anchors firmly. In other words, you will probably need to anchor directly into the concrete slab.
Then there is the question of whether the screed can withstand the compressive loads. Unreinforced self-leveling screed probably cannot.
Alternatively, you can install the lift platform "floating," meaning the load-bearing bolts pass through the screed directly into the concrete, and the lift is only screwed onto these bolts. This leaves a gap of a few millimeters between the platform and the floor, so it does not touch the "floor" at all. This is how industrial equipment is installed to avoid problems with uneven floors. Your issue here is the screed thickness, which determines the free length of the bolts. This free length should ideally be no more than 1–2 cm (0.4–0.8 inches), which will be difficult to achieve with your screed.
In industrial halls, screed is usually not used for a good reason. Instead, a thick concrete slab is poured, which is then properly smoothed and sealed.
Best regards,
Andreas
M
Mottenhausen2 Oct 2019 14:52Our screed already showed signs of weakness when installing the fireplace insert (weighing only a few hundred kilograms), despite using Styrodur instead of Syropur and recessing the underfloor heating in that area.
I would never want to put a lifting platform on it. I mean: be glad instead—first, screw the lifting platform onto the bare concrete floor, then position it and pour the screed around it. This way, for example, a more affordable lifting platform with a lower cross member can be installed. This would then be level with the screed poured around it later and therefore easy to drive over.
I would never want to put a lifting platform on it. I mean: be glad instead—first, screw the lifting platform onto the bare concrete floor, then position it and pour the screed around it. This way, for example, a more affordable lifting platform with a lower cross member can be installed. This would then be level with the screed poured around it later and therefore easy to drive over.
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