Hi All,
Structural Engineer here. Every so often I need a thickness measurement on existing structural steel (carbon steel). I have access to a Olympus 45MG, but it only has a 303 SS reference block.
I am usually measuring material that is .1" to 1" thick and I would like to be within a few...
In single story pre-engineered metal buidlings, you sometimes see a stacked X-brace with tension rods. This would look like a two story X-brace systems, but in a single story building. Where the two levels of X-bracing come together, you effectively have a K-brace condition, except there is a...
I have a 40' diameter atmospheric tank designed per API 650. The roof needs to be self supported, so I am anticipating a dome roof. I am owners rep and will be specing the tank and assisting in the owner in purchasing and construction.
I am unclear on how these are typically built. To make a...
In thread809-180411, the OP asked for a reference guide for Re-pad design at the anchor chair - I am looking for the same. I see that in some software, the shell stresses are checked with the combined thickness of shell and re-pad. This seems potentially un-conservative. What might be more...
I have seen many tanks with a planar sloped bottom (aka shovel bottom) and a drain at the low point of the slope. This drain might be a 6" pipe vertically centered on the wall to bottom plate joint and then run in to the tank a few feet (I have attached at detail from an existing tank). The...
I am a Structural Engineer doing foundation and anchorage design for the relocation of an existing tank. The existing tank is 14' dia x 44' tall. Material is unknown SS and wall thicknesses are 0.140", 0.109" and 0.078" from top to bottom. The thicknesses are very consistant, so I don't think...
I am specifying a tank for 93% sulfuric acid following NACE SP0294-2006. The document recommends using carbon steel for the tank but appears to be recommending stainless steel for the nozzles. Is this normal? It seems like there would be a corrosion problem at interface of the stainless and...
I am specifying a tank for 93% sulfuric acid following NACE SP0294-2006. The document recommends using carbon steel for the tank but appears to be recommending stainless steel for the nozzles. Is this normal? It seems like there would be a corrosion problem at interface of the stainless and...
I have an existing 8' diameter vertical sulfuric acid tank venting to atomosphere. Client would like to add a desicant pot to the roof vent. We don't want the overflow to do the breating, so how do we close the overflow to breating, but still allow it to act as an overflow? What is the...
I am a licensed structural engineer doing work in local industrial plants. I am frequently asked to do above ground welded steel tank design, but turn the work down because of lack of knowledge in this area. I am interested in getting some training, but am having a hard time finding it. Can...
