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  1. fp23

    Glass Railing Follow up questions

    I originally made a post about a glass railing here. I'm designing a glass railing for a custom stair that will be supported by round standoffs and will have a custom 3/4"x2" handrailing above the glass. I have a few follow up questions. -For those of you who design these railings in Risa, do...
  2. fp23

    Using Equipment next to an existing retaining wall

    I'm working on a TI project on an existing precast concrete building. Our work is on the main floor (mostly just a new door opening in a non-structural wall) but below this is a 28' tall retaining wall (2 stories of basement with no floor bracing it except at top and bottom). They are demo'ing...
  3. fp23

    Air Content in residential concrete

    What do you all call out for air content in residential concrete? Specifically foundation walls and footings. I've been revamping my general notes and have seen other engineers specify no air, 5-6%, or not mention it at all. No air seems to be the most common. Based on the ACI I'm coming to the...
  4. fp23

    Structural glass design without FEM

    I'm being asked if I can design a glass railing for a client. I'd like to learn glass design and I don't mind eating it on my fee to break into it, but this project doesn't warrant buying an expensive software like RFEM. My project would be a glass panel system with 2 circular glass clamps at...
  5. fp23

    Mono Stringer with thin HSS tube

    Just looking for a reality check/opinions on this. I'm designing a mono stair stringer for a client (pdf attached showing the layout and section). The stair has 2 short runs with landings and one longer run. The client would like to keep the monostringer as thin as possible. I'm suggesting an...
  6. fp23

    Reinforcing Existing Concrete by Bolting on Steel

    Can you bolt steel to existing concrete and use it as tension reinforcement? Or do you have to use something like FRP that is continuously adhered to the concrete? I don't do a ton of advanced concrete design but I'm wondering if there is code justification for something like the attached repair...

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