Thanks everyone. This helps as this is what I thought. My engineer has used a specific gravity of 1.8, which is obviously way too high.
1503-44 & bimr - Yes, there is little chance for any significant concentration, but maybe just a little. A worker flushes or washes hands, it goes to a...
Hello,
I am a structural engineer trying to design a sewage holding tank in a seismic zone. I'd like to know the specific gravity of typical of the combined fluid with solids, not just the solids. This fluid would be pumped into a tank just outside the restroom of an underground mine. This...
Hello,
I am not certain if this is best in this structural forum, seismic formum, or geotech forum, so I apologize in advance for this placement.
I am trying to interpret a geotechnical report from a few years ago at a mine site in SE Asia. We are designing using IBC and ASCE 7 codes. This...
I am using v18.0. I want to rotate the view 90 degrees, not the actual model. Dumb question: I didn't see this addressed above. For some reason my colleagues and I cannot find a way to rotate the view 90 degrees to match the view on our drawings. There appears to be no button in the ribbon...
I believe that you still find the appropriate Whitmore section at the point where the gusset meets the supporting steel. In this case, your section is only as wide as your gusset. The Whitmore section tells you the maximum width you can consider. You just can't take advantage of that because...
Also, how will you tighten the nuts? I assume that you will need to either install rods in the pipe then tighten the other ends of the rods, or you would use washers with a rounded side and a flat side. Just curving the washers don't provide for a good bearing surface though nuts are very...
The first thing that comes to mind is to use Roark's Formulas for Stress and Strain which has stresses on rings. It works best when the loads are at 90 or 180 degrees to each other. It is easy to use superposition for multiple loads, in this case 3 loads.
Since this is not exactly the case...
I'm guessing that Dik is an older codger like me. Once upon a time, AWS would allow a double fillet call out with the bottom (near) only size callout which would be understood to be the same on both sides. Both sides would only be called out if they were not the same. Somewhere along the way...
Like Thai says, option B takes double loads, but I'd say so does option A. That one weld should be analyzed to do double duty.
I think the load in option B still goes where you think it does. I generally prefer the more direct load path of option A. I don't like welding on top of another weld...
I cantilever grating all the time. If using 1 1/4" grating and 50 psf (or even 100 psf), 8" should be fine. Of course, you know that the orientation must be just as you have it shown. If you find the loading table for this grating, you could back into the stress in this case.
If grating...
Agree with BA. I could only begin to consider this as effective if the sag rod is placed within the top quarter of the member section. Even if I convinced myself of this, it would only be for top flange. Even then, this would only apply if sag rods are placed on both sides of flange assuming...
I'm not at the office right now. However, make sure that you read the code commentary for the shear lag and fully restrained connection sections. I believe that they address most of your concerns.
MrH,
Congratulations and great input! Your philosophy sounds similar enough to mine so I'll stick with my procedure. Regrettably, I needed to make a decision to apply to NCEES by tomorrow. I feel that if I had started studying one month earlier - 5 months total studying like you - that I...
