Principles for arranging channel steel on the base plate............................Enter to win.............

Are channel steels installed on the bottom plate of the storage tank? It is likely to prevent the bottom plate from repeatedly bulging and sinking during feeding and discharging, thereby avoiding damage to the welds between the bottom plate and the tank walls.

The original poster’s description is not clear enough. What kind of equipment does the base plate serve for? If it’s a circular device that isn’t buried underground, then reinforcement is the main consideration; for example, in the case of water tanks. I’ve seen circular flat-bottomed storage tanks equipped with steel beams under their base plates, and I-beams are used for this purpose. The base plates are joined together and placed on these I-beams, which also serve as a substitute for shims

The quantity, size, and arrangement methods can be found in clause 8.13 of NB T47003.1-2009 for welded steel pressure vessels; these are all determined through calculations, taking into account factors such as the civil engineering foundations, the volume of components, and costs. Generally, the spacing does not exceed 500, and I-beams with a size of 250 or more are commonly used.

Have you considered devices with a smaller diameter, such as one with a diameter of 1500, or a square base of 1000x1000? Would using I-beams with a diameter of over 250 be too large?

Those with a diameter of around 1000 need to be erected.

There are channel steels on the base plate; I have encountered two types of them. The first type is the strip foundation for large storage tanks. Due to the highly corrosive medium in the storage tank and its special structure, the spacing of the base steel members must be determined based on the weight of the medium, in order to calculate the size of the steel members required to handle the uniform load. As mentioned on floor 5, the spacing between steel sections is generally not more than 500 mm ； The second type is small tanks with a flat/sloped bottom; in this case, the thickness required for calculating the strength of the bottom plate can be quite thin, yet the stiffness is insufficient, so steel members are needed to help control deflection. In fact, this follows the same calculation principle as that of the first type of large storage tank; the only difference is that while the first type takes into account the spacing between strip foundations, here only the length of the reinforcing steel members needs to be considered.

The specifications (size) of these steel profiles, as well as their spacing, have little to do with the structure of the base plate (circular, square, rectangular); rather, they are related to the density of the medium, the liquid level at which the material is stored, and its mass (since calculations are based on uniformly distributed loads). As for the specific models and sizes of these steel profiles, these are not determined through calculation but are chosen instead. First, select a steel section specification, obtain (or calculate) the section modulus, compute the bending stress using the section modulus and bending moment, assess the stress by comparing it with the allowable stress of the steel section, and control stiffness by calculating deflection.

It’s actually a regular pressure water tank, with 10# channel steel added at the bottom, arranged in a cross shape.

Is the bottom plate reinforced with steel sections for lifting and shifting? Is it still because the foundation is uneven? Wouldn’t it be better to exclude the above direct placement plane? Or use a sloped base to increase the contact area and make it more stable.