With the FAA requirement for loading on structures to be 100k it seems that there needs to be research done. It seems very much that the precast industry should be obliged to obtain this research on this issue. Can I get support on that? If I can get a few people to support this then I will...
It seems that there is a huge hole in the practice of design and supply of manhole riser sections that have holes in them. Granted, when there are no holes in a manhole riser, the math shows that the riser sections have plenty of strength. Now then what really happens inside a riser when we...
Is anyone aware of file sharing websites for TEDDS for word files? I am aware of SteelTools.org. Is anyone interested in setting up a TEDDS file sharing pool?
The previous thread: thread176-347025 cleared up a lot of the requirements for this. Regardless, I wanted to check to see what people do with the load case 1.2D+1.6S+.5W. I have three snow cases; balanced, drift right, and drift left. I have eight wind cases. So.... I need 24 conjugations to...
thread507-249852
Just thought I'd leave eng-tip on this. To recap we're talking about designing circular concrete beams for flexure only. CRSI has tables that show phiMn (moment capacity)for a circular section. Unfortunately the tables don't have reinforcing on the low end. The tables are...
Have you looked at the Uniform Force Method in the AISC manual? (Steel Construction Manual) That will explain how to adjust your theoretical model and connection design if you don't want to connect at the beam column intersection. UFM will also address how you can attach to just the beam. In...
thread507-268076
Note that there is a new UFC out for ATFP. Does anyone know how to interpret B-3.1.4.1 with respect to the tributary area increase factor? My only guess as to what this means is that the whole wall should be loaded with blast pressure just like wind. Meaning the trib...
Nutte & Miecz; Thank you for your excellent explanations.
Now back to the real topic;
LowLax; You hit the nail on the head. Do you remember the name of the seminar? Is it available online?
Correct me if I'm wrong, but pretensioning will not reduce the breakout cone or required development length.
As for codes, would you go to a doctor who would only treat you with procedures from a manual? No, we rely on doctors to use knowledge and reason.
When a base plate sees more shear than available friction, what actually happens? Certaintly the anchors go into bending. After some deformation would it not be reasonable that a concrete wedge forms as shown in the following sketch? Wouldn't that in turn add to the friction available?
Does...
Ha ha. Design tables are fine, but not fully parametric.
And, OK, Appendix D is not that bad, but it requires a program.
So, does anyone have an open source program to share?
Yes, Mr Li has offered a spreadsheets for this and other stuff, but it is not free. Also, even after purchasing a license from him, it is not exactly open source. I believe our profession has been tunnel focused on profit for the next project. If we create open source design software it will...
Hello all,
I am designing double channel bracing for a project. Has anyone seen or developed a spreadsheet for this?
No, I'm not looking for the way around learning the specification. I am a seasoned structural engineer trying to make a profit by using as much shareware as possible. I...
Are commitee members paid for their efforts? Should they? How much would this inflate the cost of our codes?
Do the code commitees require a portion of the commitee to be practicing engineers? Should they?
Would you rather photocopy or otherwise illegally copy our overly complicated codes...
I've found that fatigue due to cyclic vibrations is the first hurdle on crushers, not impact. Have you looked at operating speed, natural frequency and resonance?
As for impact, you can calculate anything, but with crushers the variables can be very difficult to quantify. ie max lump size...
Does anyone else view appendix D as a poor code?
Let's take a poll;
How many people use a simpler, or older anchor design routine?
How many people actually use Appendix D?
