Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by mfstructural

  1. mfstructural

    Vibration of WF Beam Girders Supporting Steel Joists for Banquet Hall

    I thought about that but what if they get complaints after finishing the entire banquet hall spending a couple hundred grand and then have to go back and reinforce. I am trying to avoid that situation. From a strength perspective we can reinforce, but from a vibration it's hard to quantify how...
  2. mfstructural

    Vibration of WF Beam Girders Supporting Steel Joists for Banquet Hall

    All, I'm working on a project where the client purchased a building without consulting a structural engineer regarding the floor system. The building is two stories, no basement. There are multiple column lines spaced 29' in one direction, with HSS columns spaced at 25' and 40' in the other...
  3. mfstructural

    Large scale concrete repair

    I may be getting involved in a project where there is extensive deterioration of the concrete and rebars in a 10" conc slab. Approximately 500 localized areas of 1 to 5 square foot repairs. The depths of the repairs will likely vary and be up to 2 to 3" at some areas. In the past we've specified...
  4. mfstructural

    Reinforcing the base of an Impacted HSS column

    The columns is HSS 8x8. I like the idea of beating it flat and welding a reinf plate. The contractor specifically asked for this type of repair detail as it's what they've been using and what the client was expecting as far as cost. And I am comfortable with it.
  5. mfstructural

    Reinforcing the base of an Impacted HSS column

    I thought about that. maybe heat it if necessary just to help straighten it out?
  6. mfstructural

    Reinforcing the base of an Impacted HSS column

    I am working on a small project to reinforce the base of an HSS column that was impacted by a forklift 15 years ago...... The tenant is moving out and it's part of their lease agreement to repair it. Under normal circumstances I would just weld cover plates or angles to the corners and extend...
  7. mfstructural

    Structural Engineering New Building Design Fees

    I am working on a proposal for new design for a 5 story apartment building. First story will be precast concrete with a 4 story wood structure above. The building is proposed to be 153,000 square feet, about 34k sq ft on each floor. I've attached a few photos below. If I base the fee on approx...
  8. mfstructural

    Help Identify Unusual Steel Roof Joist

    I wanted to provide an update on what I've done so far: I used TEDDS to calculate the Ix of my joist using the section builder: Then I did the same thing for 18H8 out of the 1967 Ceco catalog, for which I have the section properties of the chords as a sanity check: The Ceco catalog has the...
  9. mfstructural

    Help Identify Unusual Steel Roof Joist

    Hey everyone, I received a response from SJI. Their response: "The joists you have presented look most similar to Butler (non-SJI) products. Attached is everything we have for this company. The information provided and the comments made concern a company that was not a member of the Steel...
  10. mfstructural

    Help Identify Unusual Steel Roof Joist

    I also came across this Butler joist truss purlin catalog from a friend. Some of the bottom chord thicknesses and web members thicknesses are what I measured but the depths are not. I wouldn't think that the joists would be overstressed sharing 1700# across three joists but they are. I'm basing...
  11. mfstructural

    Help Identify Unusual Steel Roof Joist

    I have a project where the client is planning to add a 1,700 pound RTU on an existing roof. The proposed RTU is 115"x64" with the long direction perpendicular to the roof joists preferred. I've attached a sketch of the layout. There is a 8" CMU wall that can be taken advantage of if necessary...
  12. mfstructural

    Thrust Resistance of Gable Roof with Vaulted/Tray Ceilings (Tension Continuity)

    I am reviewing some architectural plans to provide markups and wanted to get people's thoughts on some roof framing. I've attached a screenshot of the framing. There is a vaulted ceiling at one side of the house and tray at the other. There are some struts provided with H10S connectors for...
  13. mfstructural

    Shear walls on small three seasons room addition w/ all windows

    In this case, it's a four seasons room sorry. There is an existing three seasons room replacing with four seasons room and they want to potentially add a second story addition at some point. i forgot to mention that, thanks for reminding me.
  14. mfstructural

    Shear walls on small three seasons room addition w/ all windows

    I'm looking at Table R602.10.5 of 2018 IRC and see the portal header height is 18" for a 9' wall height, for a continuously sheathed portal frame. Idk if I'm interpreting this table correctly but where is it showing the minimum panel length?
  15. mfstructural

    Shear walls on small three seasons room addition w/ all windows

    So the best approach here is to just have a steel moment frame and have the joists sit on that and everything tied together at the top. I didn't check the shear walls yet, but 1'5" long x 9' high sheathed walls likely aren't adequate even though lateral loading is relatively small.
See more

Part and Inventory Search

Back
Top