Calculation of transportation supports
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As shown in the figure below, the equipment uses such transportation supports; no crane is needed at the dock. Place 2 jacks at the positions indicated by the arrows to lift the equipment, and then move the truck bed under the supports. How thick should the gusset plates, bottom plates, and web plates of such supports be? How to calculate it? Have you encountered it?
One can refer to the supports for horizontal equipment for design calculations
This post was last edited by wanlirn on 2021-7-29 at 13:56. I don’t understand what the use of this is. 1) How are these four shims placed under the equipment? Isn’t a crane needed for that? 2) If they’re placed in advance, how can you put the saddle on top of those shims first? 3) The cost of making these two saddles plus those four shims must be much higher than the cost of using a crane, right? 4) Since they’re to be used repeatedly, doesn’t moving them back and forth incur any shipping costs? No extra cost? 5) With your method, no matter what the diameter of the equipment is, it will definitely be too wide; as a result, the handcart won’t be able to go underneath the equipment, and there will also be additional costs for using the handcart. . . 6) The saddle and the equipment are movable, right? How do you ensure that the loading crane at the dock doesn’t collide with the saddle when it is lowered? The equipment is so heavy; won’t it cause the saddle to collapse if it hits it? Will the dock safety officer approve you unloading in this way? Or you can use a tie rod to connect the two saddles together; so does the tie rod cost nothing? Your idea is simply not practical – it’s only meant to save a little money on crane rental costs
This post was last edited by Paris on 2021-7-29 at 15:21. First of all, for the transportation of our equipment, such transport supports are required; they are necessary even when using cranes for loading and unloading. However, the sides of the base plate do not need to be that wide. Secondly, we have used this method several times without any problems. I haven’t been to the delivery site, but I’ve also heard no objections from the port authorities regarding this loading and unloading method. The support structures used for transportation in the past were quite thick, made of steel plates 30–50 millimeters thick; the thickness was determined arbitrarily. Since the weight of the equipment varies each time, I wanted to know how to calculate the exact thickness of the steel plates required, which is why I asked how to do such calculations. Also, this method isn’t something I invented on my own; I know of at least two other manufacturers who have used this approach to transport large equipment. I won’t mention which ones specifically, and they aren’t small companies either, nor is the equipment they transport small. One of them had a transportation company provide the relevant dimensions, while the other seemed to have someone calculate them. We also used this method to transport a cylinder section with an inner diameter of 5 meters and a thickness of 290 meters during on-site construction. Now I just want to ask if anyone knows how to calculate these dimensions, as I don’t want to have to guess every time.
The forces applied should be different; in the case of conventional supports, the entire bottom surface is under stress, while with this type, when jacks are used, the middle part remains suspended and only the ends are under stress.
Piles are used on site; for this saddle, just increasing the thickness of the base plate will do
Transporting using saddles – of course, it’s not something you invented; that goes without saying. I mean, you want to save that little amount of money on crane fees by using four jacks – that’s not practical. It’s certainly possible to place the saddle on a trolley and then put the equipment on it. But what I’m saying is, is it safe to use four jacks underneath as well?
I wonder if you’ve noticed that in the calculations for saddles, there’s no calculation for a bottom plate; what is calculated is the combined cross-section of the gussets and web. In fact, a backing plate is generally not taken into account either, as it isn’t used for reinforcement purposes
This structure needs to be analyzed using mechanics, taking into account the transmission of forces, and then the stress is calculated based on the magnitude of the forces acting on the base plate