2-Column Car Jack Installation: Optimal Hole Dimensions and Anchor Recommendations for Concrete B25

Question

Hello . On days I will be preparing the floor for the assembly of a 2-column car jack and I have a question. So yes, at what depth, width and length should I make holes in the ground so that it is good? Will 70 cm x 70 cm x 70 cm do I do it well? Because in general I have a poured floor in the...

gabik001 · Answer

I installed such jacks (2) at my brother's workshop and the spout was 6 inches (15cm) thick and that was enough. Generally, in these lifts the pressure force is centrally down below the columns, so with such foundation sizes it will calmly fulfill its task.
What is the anchor I used to use such mining (they were 30mm in diameter outside) but it was about 20 years ago ...

kortyleski · Answer

Download the lift dtr. There, the foundations will be described and dimensioned.

Pio5311 · Answer

Well, I'll do 70 cm deep, wide and long and I think it's okay.
And I will not give reinforcements or do you think to give?
I also think that without the formwork directly In the ground, is it better to plank?

kortyleski · Answer

You should give one bench under both columns. Concrete should always be reinforced so that I can immediately fill in the mounting pins. Somehow I don't trust the anchors and the pulling forces are quite large and it is not true:

gabik001 wrote:
Generally, in these lifts the pressure force is centrally down below the columns,

Pio5311 · Answer

Well, like a bench under both columns, then I think 30 cm deep enough that the columns protrude from 20 cm and the width then I would make 80 cm And without reinforcement Because this Concrete is hard yet I think there is no need

Anonymous · Answer

Compressive strength may and may not have, but not necessarily tensile. I would suggest, however, arm this beam. You won't get poorer from 4x fi12.

Pio5311 · Answer

Gosh, can't it be just the foundation for the columns?
I will give a depth of 70 cm And I will give this reinforcement and length and width after 100 cm And I think it will be good and I will not need to pour benches on two columns what do you think about it?

Anonymous · Answer

The ground is that it works. Take, for example, an entry gate, double-leaf, mounted on posts with separate foundations. How the gate closes after assembly, like after a year, two, summer, winter ... A strip of two-meter reinforced beam between the column feet will provide you with the stability of the structure.

kortyleski · Answer

Please, dump from one of my lifts.

Strumien swiadomosci swia · Answer

Of course, concrete must have reinforcement because without reinforcement it is only stone, sand and cement with water. And it has to crack that it breaks 100%.
Secondly, connect these feet with a 40x40 reinforced beam.
As I remember, the anchors are 18mm and if you fasten them properly, you won't break out for anything.

RedEd · Answer

Stenhoj 2.3F (two screw columns without a connector) if I remember correctly it has requirements for a base 90cm (I gave 110) width 450cm long and minimum 30cm (I gave about 40) depth, concrete min B25 reinforcement not required (I gave it for peace of mind on the bottom layer) the assembly was performed by steel studs.

Strumien swiadomosci swia · Answer

The point is that when concrete breaks, it will most often scratch on the anchors and will break apart without reinforcement and we have a big problem. Unless the column is placed with the car.

Pio5311 · Answer

I don't know if this reinforcement is necessary.
I work at the workshop And from what I found out they have Concrete B20 I without reinforcement And these are Hoists up to 3t And we also have buses and the same without reinforcement And Concrete b20 I I have a normal long time so I think I will give b25 myself and without reinforcement

Strumien swiadomosci swia · Answer

Just 2 wires fi 12 around the foot.

Pio5311 · Answer

And I think I will make such dimensions as in this attachment

Added after 1 [minutes]:

What do you think will be okay?

Added after 5 [hours] 35 [minutes]:

And one more thing.
Can I do it myself In a concrete mixer Beton b25?
Because you know I would buy a few bags of dry and embrace it but I would like to leave b25 instead of b15

So what it looks like

kortyleski · Answer

Almost 2 cubic meters of concrete. Modestly counting two pallets of bags ...

phu_szczepan · Answer

And don't forget to check the tightness of the anchors after some time (e.g. a week or two). Just in case Here are some more tips on how to mount two columns:

2-Column Car Jack Installation: Optimal Hole Dimensions and Anchor Recommendations for Concrete B25

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