tipping/carious stabilizers

[Mello Dessi]

Good morning to all and thank you in advance for those who want to help me.
My problem is this:
I have to make a lifting plan with a moving crane.
of this crane I have everything, dimensions, slender length, maximum flow in the various rays......etc. What I would need is the load on the stabilizers, how many kg is dumping on the ground with that radius and that weight. the crane's arm turning 360 ° and having the non-baricentric raddle center there will be so many exhaust configurations, I would need to know the most critical one, because from that, I will choose the most appropriate redistributers for that type of terrain.
there is already a site where you can calculate this data, but only for some specific models of cranes.
the stabilizers lean on the ground at a distance of 6x6.15 mt, the crane has a weight of (q1)50t + (q2)5t of ballast, and must lift a load of (q3)6.4t, placed at 12.856 mt from the raddle center, the crane arm is set at 20mt.
I do not know if in these cases a safety coefficient must be added.
I tried to schematize the crane in the attached file.
Thank you.

 

[radio]

that I know the builder of the crane declares the max load on the stabilizers (calculated according to the norms of the field), and according to that and the conditions of the ground you will choose the flats.
can be that for the work you have to do the crane is oversized and consequently the real load on the stabilizers will be lower, but you will always be safe.
I do not know if it is the case of calculating the load on the stabilizers alone; if the weight to be lifted and/or if the arm of the crane for some reason are greater than the pervist ones you risk big.

 

[Mello Dessi]

that I know the builder of the crane declares the max load on the stabilizers (calculated according to the norms of the field), and according to that and the conditions of the ground you will choose the flats.
can be that for the work you have to do the crane is oversized and consequently the real load on the stabilizers will be lower, but you will always be safe.
I do not know if it is the case of calculating the load on the stabilizers alone; if the weight to be lifted and/or if the arm of the crane for some reason are greater than the pervist ones you risk big.

on the site of some models there is the program to calculate it/saper, but in the manual there is not.
Everything is safe because from the crane load tables, you already know that with that weight and radius the crane is stabilized. the problem arises when you find unconstituted soils, sandy.......then knowing the pressure of the stabilizers is important.

 

[radio]

ok, at "feel" then I would say that if the performance is tabled, the loads on the stabilizers should be too; try to hear the builder?

 

[meccanicamg]

the site manioc has computer for the stabilizers of some cranes.

you may find it useful to consult this tool to get a precise estimate of the load on the stabilizers for your specific model of crane.

In general, the most critical load occurs when the crane arm is extended to the maximum radius with the maximum load and in position to create the highest tipping time. This scenario requires the use of adequate dividers to distribute the load on the stabilizers and prevent damage to the ground or risk of tipping.

 

[TETRASTORE]

I do not know if it is the case of calculating the load on the stabilizers alone; if the weight to be lifted and/or if the arm of the crane for some reason are greater than the pervist ones you risk big.

I agree. It is a fact that the manufacturer must provide you with the maximum tipping moment that must also take into account the possible push of the wind (the maximum admissible speed of which must be indicated in the manual).
If you buy the crane and you have to build the platform, in this case you should use the calculation of a professional who can also certify it on the basis of regulatory requirements.

In general, the most critical load occurs when the crane arm is extended to the maximum radius with the maximum load and in position to create the highest tipping time.

if the crane consists of fixed structures, yes. if the arm is instead constituted by hydraulic parades the maximum tipping moment you have with the maximum load applied to a distance less than the half-carry; this because with the maximum extension there is a limit of the maximum load due to the fact that as the arm extension increases (number of hydraulic profiles) the section of the last elements is reduced and the relative load capacity.

 

[Mello Dessi]

the site manioc has computer for the stabilizers of some cranes.

you may find it useful to consult this tool to get a precise estimate of the load on the stabilizers for your specific model of crane.

In general, the most critical load occurs when the crane arm is extended to the maximum radius with the maximum load and in position to create the highest tipping time. This scenario requires the use of adequate dividers to distribute the load on the stabilizers and prevent damage to the ground or risk of tipping.

It's just what I use, but there's not all the cranes. Thanks anyway!

 

[Mello Dessi]

I agree. It is a fact that the manufacturer must provide you with the maximum tipping moment that must also take into account the possible push of the wind (the maximum admissible speed of which must be indicated in the manual).
If you buy the crane and you have to build the platform, in this case you should use the calculation of a professional who can also certify it on the basis of regulatory requirements.


if the crane consists of fixed structures, yes. if the arm is instead constituted by hydraulic parades the maximum tipping moment you have with the maximum load applied to a distance less than the half-carry; this because with the maximum extension there is a limit of the maximum load due to the fact that as the arm extension increases (number of hydraulic profiles) the section of the last elements is reduced and the relative load capacity.

Unfortunately some are out of production cranes, so hardly the builder can give you an answer.
Thank you.