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  1. ENGR_2321

    What are examples of inverted pendelum structures?

    Does a grade beam with two HSS posts and a wood beam on top all connected be considered an inverted pendelum?
  2. ENGR_2321

    Where can I find practice problems for temporary structures and other topics

    Where can I find practice problems for "temporary structures and other topics"? (category for civil Pe exam. I was only able to find some example problems but these topic is sprinkled and scattered so I'm trying to find a good place to get more problems for this topic
  3. ENGR_2321

    Steel beam columns subject to flexure and compression

    I am using the 14th edition steel code. They do not show the m and u factors on part 6; they only show the two interaction formulas. However, they do refer me to the Aminmansour article (2000) for more info on how to use the current practice procedure. In other words, supposedly the m and u...
  4. ENGR_2321

    Steel beam columns subject to flexure and compression

    I’ve been studying this topic and I know to use CH H formulas for combined forces of the AISC code it is pretty straight forward. However when a column size is unknown (in other words, designing for the lightest W shape for example) there are several procedures one can go about. I investigated...
  5. ENGR_2321

    Diaphragms and Rigidity question

    Haha I completely see it now. It's like pinning that CR and and seeing how that F force from the CM will turn it. Yes that makes perfect sense. coming in directed towards south would make it clockwise. In this case, it heading north, hence making it turn counter clockwise. Thank you so much...
  6. ENGR_2321

    Diaphragms and Rigidity question

    Hi BA, that makes sense but look at how they have it ( I inserted picture of it). If we are following that logic of looking at it like a beam with an eccentric load, then wouldn't it be clockwise ? (based on the picture). I notice they have the arrows of the shear going with (instead of...
  7. ENGR_2321

    Diaphragms and Rigidity question

    Hi everyone. I was working on a problem from the IBC Structural /Seismic Design Manual and I have two questions I am wondering if anyone know, your answer would be appreciated. here goes: 1) when considering torsional and direct shear , is the torsional moment always assumed counter clockwise...
  8. ENGR_2321

    Masonry beam shear area

    I've heard good things of that book. It's one of the books I plan to buy soon, need to get me a couple of good masonry design books
  9. ENGR_2321

    Masonry beam shear area

    in case anyone else sees this post, here is the revised solution to this problem so no one gets confused. solution here is modified to apply to the 2011 code , we still get the same answer 12 kips. ( tip for rookies like me: DON'T square root ksi !! it messes up your values tremendously. no...
  10. ENGR_2321

    Masonry beam shear area

    Oh...I think I see what the problem is. the 2011 code says on the commentary that prior to 2011 edition, the shear resistance provided by the masonry was not added to the shear resistance provided by the shear reinforcement rebar. But now they do. so I think this question might be outdated
  11. ENGR_2321

    Masonry beam shear area

    I thought we were allowed to use M/Vd = 1.0 to simplify calculations (per the commentary). I'm using the most current code (2011) but I think I am looking at the same equations you have. The problem only has the beam dimensions and gives the fy and fm. We cant really know the value of M/Vd...
  12. ENGR_2321

    Masonry beam shear area

    I changed the area to 152.5 and it only decreased my answer to 216 kips it's still significantly bigger than the answer 12 kips though
  13. ENGR_2321

    Masonry beam shear area

    Hi everyone. I was wondering if anyone knows what is considered the "net shear area" in a masonry beam. I went through the current masonry code and searched online and it seems to be equal to An which is the cross sectional area. In other words Anv=An. however when im calculating the max...
  14. ENGR_2321

    Af flexural reinforcement -corbels

    Hi there. for corbel flexural reinforcement Af (moment) the PCI code example uses the following formula to find it Af = [ Vu*av + Nuc*(h-d)] ÷ [ Φ fy d ] and this is the formula I have been using ever since. But I recently bought a practice book online that states that Af is actually...
  15. ENGR_2321

    Corbel -reinforcement Af to resist factored moment

    Okay yes I was thinking that too. I'll go with the PCI handbook. Thank you
  16. ENGR_2321

    Question about the interaction ratio for combined compression axial and moment formula

    Hi there I'm using the following formula from the AISC for the combined axial compression + moment (a) when Pr/Pc ≥ 0.2 Pr/Pc + 8/9 ( Mrx/ Mcx + Mry/ Mcy ) ≤ 1.0 (b) when Pr/Pc < 0.2 Pr/2Pc + ( Mrx/ Mcx + Mry/Mcy ) ≤ 1.0 I have all the values ready to just plug and compute. The...
  17. ENGR_2321

    Corbel -reinforcement Af to resist factored moment

    So I am calculating corbel reinforcement and I've gone through all the required ACI reinforcement equations ( Avf, An ) and am about to calculate As which is the primary reinforcement. In order to compute As, I need Af which is another reinforcement requirement established to resist factored...
  18. ENGR_2321

    compression load calculation- resistance factor

    Haha yes that's about how old some of mine[tongue] are but that's true. Some concepts never change
  19. ENGR_2321

    compression load calculation- resistance factor

    Thank you Ingenuity! You are a life saver. This definitely answered it. I think the design books I picked are a bit old and I completely overlooked the commentary section. THANK YOU:)

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