Completing 230st District Construction: Mounting Steel Shaft (40x40x2, 40x20x2), Top vs Bottom Fix

Hi, I am in the process of completing the materials and construction of the 230st district, I bought a steel shaft (profile 40x40x2) (40x20x2)> I have a problem with the shaft mounting, can not be mounted from the bottom (the opposite as per the photo) and whether the top can not lie on the profiles, what is going on with these protruding profiles what looks at different constructions is a roller from the top and the top rests only on 4 legs, it would not be more stable than it would lie on the structure and the roller on the bottom?

You must have forgotten about links, photos?
I do not know what is going on with this lying table, I personally did not build such structures, but when I grew up in the countryside I saw a lot of them, also in my family. My grandfather always built everything, from home, through the country office, to the tractor, and in fact probably 3
The worktop was always attached to a solid construction for profiles around the perimeter. It must be rigid, strong, stable. It is a shame for your hands and my ZUS !!!

From the point of exchange of the saw itself, this is the best solution, you lift the table top and replace the saw. You have to do it to make it safe.

But thanks to the application of the roller from the bottom and the table top seems to be more solid, I do not know the construction of this rally. I am looking for help. I would also let the float hinge up.

I would do it like in this photo, of course the flat bar would not wedge behind the dial.

The difference in the mounting of the shaft, with the same diameter of the circular saw.

Hello Maciek
you are absolutely right about the construction of the table, as in the second picture,
suspending the shaft from the bottom, it makes work difficult, but there is some support of the whole table, the first picture of the blue structure, shows that doing something like that made it easier to mount the shaft itself, but then, if you have a problem with the table, the table can not be supported only in these places, especially at the point of contact of the saw-plate, if this place is bend, an accident may occur, bounce the wood or something else, or breaks the saw, there was an event in nearby, my guest had a piece of saw, stuck in the face, survived then he did not want to cut anything anymore
Best regards and watch out for your fingers

maciekchn wrote:

what is going on with these protruding profiles what looks at different constructions is a roller from the top and the top rests only on 4 legs, it would not be more stable than it would lie on the structure and the roller on the bottom?

These "splines" in such a design were just enough to stabilize the table top and, if necessary, were easier to replace. With the fact that with all "samozóbkach" these tongues were made of winkłki (angle bar) and it looked like in this scheme (view from above):



The red lines are angle-bars. Outlets from full profiles, I have not met such an invention yet, because it practically would not pass the exam. Between the protrusions, the beams fitted on which the table top lay and these beams were attached to the top from the bottom (blue rectangles). After pressing into protruding angles, it limited the movement of the worktop in all possible directions. With a good fit and execution, even if the countertop had the right weight, it lay on the edge without any fixing, it was enough to press only between these "winkles". In addition, sometimes the table top does not bend, appropriate supports were provided from the appropriate "squared", of course not always, on the central beam along the saw.