If it isn’t self-supporting at its skirt, is it still a tower?
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It is stated in 47041 that for containers with a H/D ratio greater than 5 and self-supporting skirts, those use support pedestals or leg-type supports; so does a structure with a height-to-diameter ratio greater than 5 cease to be considered a tower?
So the vacuum tower in atmospheric and vacuum distillation isn’t supported by a skirt, right?
NB/T47041 explains that the supports of a tower include a skirt, ears, and legs. But 47041 only takes into account the skirt seat situation
Personally, I think it’s still the tower model. Whether it is a skirt base or a leg base, the tower is subjected to wind loads and seismic loads in the same way. The difference lies in the stresses on the supports, as well as the stresses at the junctions where the supports meet the tower structure.
Consider geology, meteorology, and loads. If H/D is greater than 4, it is called a “tower”. Sleeve bearings, supported bearings, and leg-type bearings are all suitable.