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  1. Gradstructengineer

    combined footing for truss-bracing element (compression and tension)

    Thank you KootK and SWComposites, thanks a lot Greenalleycat for taking the time to do a sample calculation. Please see attached pdf of the free body diagram of the full structure. My understanding earlier was that I needed to have enough concrete equivalent to 82.5kN to resist uplift...
  2. Gradstructengineer

    combined footing for truss-bracing element (compression and tension)

    Hi All, I have to design the footing for a truss brace. Please see attached image. Under wind loading the support reactions at the base of the footing are 82kN and -82.5kN. Do these forces cancel out each other with the total uplift load as 0.5kN or do I need to design a footing with a SW of...
  3. Gradstructengineer

    Valve pit Thrust restrained wall design

    Parts list attachedhttps://files.engineering.com/getfile.aspx?folder=ed8b8ce8-e6f2-47ad-9f95-2030bd735d60&file=Parts_List.JPG
  4. Gradstructengineer

    Valve pit Thrust restrained wall design

    Hi All, Thank you so much for your responses. I have attached the plan view and a snapshot of the parts list, how do I tell if these are push pipe fittings (sorry if this is a dumb question). I have to design the end walls for punching shear for a thrust force = 1.5*P*A for the three walls and...
  5. Gradstructengineer

    Reinforced Stone Gravity Retaining wall

    Thank you for your responses, the client wants the option to lay the fencing in the future, its not part of the retaining wall at the moment. I have provided wall reinforcement (N16-250 vertical laid centrally with N16-250 horizontal bars) to provide some tensile strength to the wall, hopefully...
  6. Gradstructengineer

    Valve pit Thrust restrained wall design

    Hi all, I have to design the walls of a valve pit to restrain thrust from the pipes going in, could you please advise me on how to calculate the thrust force from a pipe that's passing through the valve pit walls (with puddle flanges), no bends or change in size of the pipe as it is passing...
  7. Gradstructengineer

    Reinforced Stone Gravity Retaining wall

    Hi all, I have to design a stone (grouted) gravity retaining wall (1.1m tall). I had designed it in such a way that the resisting moment due to self weight was much higher than the overturning moment due to soil pressure but now the client would like to fix fencing over the wall. With the...
  8. Gradstructengineer

    Cutting top of bolt (pinned support under compression)

    It is for a small mezzanine floor that is being added to an existing structure, so not much shear forces and no uplift. The concrete slab is already there and the countersunk bolts we are using are mechanical, so no epoxy.
  9. Gradstructengineer

    Cutting top of bolt (pinned support under compression)

    Thanks for replying Tmoose, we have decided to go with counter sunk anka screws so that its pretty much flush with the top of the baseplate.
  10. Gradstructengineer

    Cutting top of bolt (pinned support under compression)

    Hi all, would it be okay to cut the top of a chemset bolt to make it flush with the base plate and plug weld the top of the bolt hole as required? The pinned base plates have been designed for compression, there is no uplift. Therefore, I am thinking the only purpose of the chemset bolts is to...

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