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  1. firstoption

    ACI restriction for bending bars from slab to bottom of footer?

    I have been previously rejected by a plan reviewer for having slab steel bend to bottom of footer. They ambiguously stated that the detail violates ACI but i cannot seem to find this restriction. In that note, how would this recessed shower detail be corrected?
  2. firstoption

    How do i determine if T-beam is prestressed?

    I always thought you would be able to see tension rods from the ends of the beam if it is prestressed, but i was told by a contractor that is not always the case. There is an overhanging T-beam that we want to cut but someone pointed out it may be prestressed and not a good idea. I suppose the...
  3. firstoption

    frame wall reaction

    well i suppose here is the main issue. There is an interior frame wall that is supposed to only have drywall (so no structural sheathing). There IS a load being applied on the exterior. I'm trying to figure out a quick and dirty analysis that would make this frame work for an applied load. I say...
  4. firstoption

    frame wall reaction

    Hello Can someone tell me if my simple check on this shear wall is reasonable? I am checking for tie down of shear wall to the foundation. (of course I also check the shear component) Also, if this check works out, is it reasonable to assume that the wall diaphragm isn't taking half the shear...
  5. firstoption

    diaphrgam analysis

    is there a book or reference material someone can suggest? i bought an ICC book by Terry Malone but it seems the material is too advanced. the problem are very complex
  6. firstoption

    diaphrgam analysis

    it is single story light gauge metal. I assumed rigid.
  7. firstoption

    diaphrgam analysis

    hello everyone I am having trouble with this type of analysis for a small structure (attached diagram) I am going off a example i found in a book. When i get the value of Vmid, i am comparing it to the lateral capacity of the sheathing. (for the exterior) What do i do with the interior? i am...
  8. firstoption

    mechanical applications reference material

    hello everyone can you guys please provide me with reference material for the installation, design, etc. of these topics: - Boilers/ pressure vessel systems - Condensate piping - Low temperature refrigeration - Piping for lift stations - Piping and installation of gasoline tanks - Gas...
  9. firstoption

    Interior wall simulation

    Hello All I am using Accuload for cooling load calculations for a home. What i am having an issue is how would i accurately simulate the walls that are adjacent to an unconditioned garage? It is obviously not exterior so the sun isn't beating down on them, but it is abutting a warmer area. I...
  10. firstoption

    Proper simulation of frame analysis

    that's not the issue. fixed bases also resulted in the same problem
  11. firstoption

    Proper simulation of frame analysis

    here is the sketch @XR250 thanks, that's kinda the confirmation i needed. Just wasn't sure how to simulate this. (i eventually restrained both top plates and was debating on just doing one)
  12. firstoption

    Proper simulation of frame analysis

    It's been so long i've worked on structural, i can't believe i'm in need of assistance for something so (seemingly) basic I am analyzing a simple 2D frame (two walls, two rafters, one joist, two interior braces). Pinned connections at base. When i run the analysis, i obtain rational stresses...
  13. firstoption

    Does anyone have test data for J bolts?

    that's how engineering works. products need to be qualified. why answer a question with another question when you're ignorant with the regards to the topic at hand?
  14. firstoption

    SE Exam AASHTO Code

    NCEES is ridiculous with their testing strategy they WILL include questions that will be on a previous edition but lead you to the INCORRECT answer. I suppose they make money off of making people buy the current edition of books (not that being able to use an old one isn't an indication that...
  15. firstoption

    MecaWind results

    I thought so too, but I am getting pressures of up to 110psf for a single story building. most products aren't rated for that
  16. firstoption

    MecaWind results

    I am looking for confirmation on what this statement means above the C&C results: "All pressures shown are based upon ASD Design, with a Load Factor of .6" I am to simply multiply my table of results by 0.6 for use in designing connections, or was the factor already included in the results? I...
  17. firstoption

    Calculate Room Temperature

    Wouldn't there be some sort of differential equation to figure this out? this sounds like a physics problem i did in high school. forgive me since it's been a while
  18. firstoption

    Calculate Room Temperature

    when would there be no ventilation in a space? just trying to figure out a scenario where finding out this temperature is even necessary
  19. firstoption

    what recommendations should i give to client?

    thanks for the link. Yea, i thought 53tons seemed pretty high. Even after adding insulation for compliance with code, i still need 45 ton. I'm using manual M calcs, not a rule of thumb tho, so the 1 ton per 500sqft would be way off. With this load i see that there really is no way around...

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