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  1. ARPASEVAN

    Pin connection at the edge of a concrete deck - CSI SAFE

    Hello, I can’t figure out how to make the deck to wall connections highlighted below pinned. I go to assignment - edge releases choose bending moment as 0 but how do I apply to the edge I want? I am assuming there must be an easier way. I read about using line elements, but I don’t see the...
  2. ARPASEVAN

    Read multiple points on a line element

    Thank you S&T for your response and link to the post. My output for the blue beam (Frame #3) is shown below. The bays are 10', 10', 20'. I am not sure how to create three segments from this data.
  3. ARPASEVAN

    Read multiple points on a line element

    Hello, Is there a Python code to provide joint information on a Line Element? For example, the blue member shown below is one piece, and I can read the end joints and all forces, but this doesn't provide much help for internal connections and forces. Is there any other way to get data for each...
  4. ARPASEVAN

    Draw columns in ETABS

    Figured it out. Can't draw on ground level. Need to be on 1st floor.
  5. ARPASEVAN

    Draw columns in ETABS

    I have the grid lines. How do I draw nodes, or assign nodes to intersection of grid lines? thank you.
  6. ARPASEVAN

    Draw columns in ETABS

    Hello, I am learning ETABS (migrating from RISA) and can't seem to figure out why I can't draw any columns on a blank model I have created. Any help will be appreciated. thank you.https://files.engineering.com/getfile.aspx?folder=939889f9-11f7-403b-b249-2ede4d83f42e&file=4_story_building.EDB
  7. ARPASEVAN

    Hydrostatic Pressure on Drilled Shafts

    Hello, maybe I am misunderstanding the question, but the caisson will be pushed up with the weight of displaced water. So for every foot below GWT, the force will be 3.14x1.75x1.75x62.5=600 lb uplift.
  8. ARPASEVAN

    Wind Loads on Interior Walls

    For an architectural free standing wall, I also look into seismic loads if the finish is heavy such as stone on both sides shown below. .
  9. ARPASEVAN

    I joists parallel to the exterior wall

    I design those blockings to take the out of plane wind and seismic loads on the walls. (Spreadsheet not updated to ASCE 7-16)https://files.engineering.com/getfile.aspx?folder=c0f1c532-09c6-4fed-9784-3b7324849825&file=Wall_blocking_-_2019.pdf
  10. ARPASEVAN

    Moment transfer from a grade beam to a caisson

    MotorCity, The moment comes from retaining walls at either side of the grade beam. The connection is pinned and they are poured at different times. Thank You.
  11. ARPASEVAN

    Moment transfer from a grade beam to a caisson

    Yes, you are correct HTURKAK and that is what needs to be done. The development length in the grade beam will still be an issue and may require a deeper grade beam. Shear transfer will be with shear friction and will easily work. Thank You.
  12. ARPASEVAN

    Moment transfer from a grade beam to a caisson

    Hello, ACI 318-19 has changed section 25.4.3 substantially (Development of standard hooks in tension) and made moment transfers from grade beams to caissons a bit more challenging. Is the following approach reasonable or too conservative? Let's say I have a 200 ft-k of moment to be transferred...
  13. ARPASEVAN

    Ignoring SMF Requirements?

    The section that allows you to use R=6.5 for shear walls and the corresponding R for moment frames is 12.2.3.3: https://res.cloudinary.com/engineering-com/image/upload/v1647892056/tips/Screenshot_2022-03-21_124722_r54mhs.jpg]
  14. ARPASEVAN

    Ignoring SMF Requirements?

    There is a lot of testing and research behind those frames and choosing what requirements to use/not use is not very "professional". Your boss is 100% wrong. You either use SMF (or any other frame) with all design requirements or you don't. You may use a multi story OMF in most residential...
  15. ARPASEVAN

    Structural Engineering Liability - Wetstamp

    I would highly suggest you contact an attorney for your answers as you may be taking a huge liability. Personally I would not do it, because those developers cut corners all the time to save money.
  16. ARPASEVAN

    Enercalc Warning - Errors in ASCE 7-16 Seismic Load Generation

    ... and this is why I never rely on any software for design and only use them to check my spreadsheets. Risa 2d gives you the option of 1.5 factor per TMS 402-13/ACI 530-13 section 7.3.2.6.1.2 but does not use the correct in Plane Shear Capacity formula. Weyerhaeuser's Forte software under the...
  17. ARPASEVAN

    Roof Rafter Collar Tie Calculations/Design

    mfstructural,model it as shown below and you will not get the instability error.
  18. ARPASEVAN

    Roof Rafter Collar Tie Calculations/Design

    JLNJ, You are correct, I assume no lateral resistance at the supports. (Rafters sitting over stud wall with no out of plane resistance @ top)
  19. ARPASEVAN

    Roof Rafter Collar Tie Calculations/Design

    Hello, You will have moment in the roof rafters. See the Moment and Tension formulas below. I hope this will help.
  20. ARPASEVAN

    Residential Monolithic Footer - Eccentricity

    Thank You hoshang.

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