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Sorry one last detail I thought I included originally. We are employing the Fig 5.7 note 9, regarding the use of the OD dimension from the table as the ID dimension. This stipulates that reinforcement area per 5.7.2 and 5.7.3 must be maintained, and is what this client is insisting means we...

Sorry, yes a detail I forgot to mention is that these are low-type reinforcing pads, so they are tombstone/rathole shaped. Thus the distance from the opening CL to the tank bottom is greater than that off the side (or above). We are taking into account excess shell thickness, the neck...

Hello, I have a customer who is insisting that the area provided by a repad be sufficient through all cross sections - the minimum cross section of course being the horizontal one. I have tried to explain that per API 650, the area to be replaced is measured vertically. The definition in...

Hello, Currently trying to design (well, check) a girder in SAP2000. It's ~440 inches long, loaded by a number of rafters along its length. The issue I am having is that because of its length, SAP seems to think it has no moment resistance. The analysis is only in the 2D plane of the...

Thank you IRstuff! Not sure why my link didn't work, I probably should have just linked it in the text body (https://www.dropbox.com/s/r18xnzz9rzctseo/help.xmcd). Anyways, you were bang on, I just wasn't using the sum correctly. I can absolutely see why it works now that it's laid out in front...

Hello all! I'm a pretty new mathcad user and I'm not familiar enough to find the solution to my problem alone. It should be pretty simple, it's just a matter of my not understanding how mathcad is using these variables (or lacking a programmer's mentality and ability to think the logic...

Thank you both! SteeliesFire55, your answer mirrors the response I received from the support ticket I opened as well. My beam length is quite long, which is of course why there was such a large discrepancy. Thanks for explaining what's going on. Stressed, thanks for the input. I had forgotten...

Hey everyone, I am trying to design a stairway using channels for stringers. The loads are getting too high for the span, and so I thought to attempt a built up channel, using plates and angles. Interestingly, upon changing from a C18x58 channel to a built up section of approximately the same...

Thank you avscorreia, at least I know now I must do it manually. It's not too much of a hassle, it just seemed like there was a way to avoid it based on that wiki entry. A bit tedious but it works. For anyone else following along in the future, here's how I got it to work: Load patterns...

Another way to phrase this is that it seems you can only differentiate the loads applied to different shell objects at the pattern stage. I click on a shell object, and tell SAP which load patterns should applies. This is directly NOT what the wiki says, where you are told to define global...

Hi everybody. I'm working with a structure where I need to have a supported load of 1000 lbf anywhere. I will be converting this requirement into a 50 psf load over a 20 ft^2 area. My structure is such that the shell elements between secondary beams are essentially 20 ft^2, and so I will...