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  1. CovertShear

    Wind Effects on a Three-Sided Billboard

    I am designing a three-sided billboard as shown in a stock image below: It's 12 m (39 ft) tall, the width and height of one face is around 4 m (13 ft), and the peak wind pressure is around 1,6 kN/m2 (33 psf), nothing fancy. I would like to know how to calculate the wind pressure under...
  2. CovertShear

    Precast Concrete Frame with HCS

    Hello I am designing a structure for a 2-storey shopping center. The dimensions are: - Hollowcore slab span 8,0m (26ft). - Inverted Tee beam span 12,0m (39ft). - Live load 5,0 kN/m2 (100 psf). I dont have much experience with a precast concrete, so I went out and looked around existing...
  3. CovertShear

    Precast Parapet - Precast Balcony Slab Connection

    @KootK When you look at a lot of common precast connection typologies that utilize steel hardware, a common theme is that they transition from structural steel to reinforced concrete as soon as practical Interesting, I did not know that, but it makes sense, especially the flexural...
  4. CovertShear

    Precast Parapet - Precast Balcony Slab Connection

    @dik That looks nice, but I am worried such a connection's rotational stiffness is somewhat small compared to what I designed. Since this is for a 19 to 24 storey building with somewhat high wind loads, and my intention is to limit the deflections (glass panels on parapet), I would have to use...
  5. CovertShear

    Precast Parapet - Precast Balcony Slab Connection

    @dik Hmm interesting, cant really imagine it, is it something like this (attachment) ? I have a nagging feeling that my design could be overdone (although I spent quite some time working on it). But considering high wind loads (pressure / suction) the design looks appropriate, although I agree...
  6. CovertShear

    Precast Parapet - Precast Balcony Slab Connection

    @HTURKAK Thanks for your input HTURKAK. I have been in contact with HALFEN people trying to make their product (BRA Corbel, the one you sent) work, but they are hesitant to green light it, because there will be glass paneling above the parapet (they are worried because their product has a...
  7. CovertShear

    Precast Parapet - Precast Balcony Slab Connection

    Hey guys I am designing a connection between a precast concrete parapet and a precast balcony slab on a 19 storey residential building. The load bearing structure of the building is mostly monolithic concrete. INPUT INFO: - Parapet thickness 130 mm (5.11 in) - Balcony slab thickness 190 mm...
  8. CovertShear

    Subgrade reaction coefficient for piles using japanese design code for building foundations

    Could you link me the code please?
  9. CovertShear

    Old to new foundation

    You could use mechanical or chemical anchors. HILTI sounds like a good option. Is it necessary to connect the foundation of the new house wing with the old structure? Why not construct a dilatation joint? Maybe I am reading the plans wrong. You should be worried about settlement. Consider...
  10. CovertShear

    Concrete Slab - Z Shape Section Detail

    @TLHS How would you do the strut and tie check for the moment transfer? Can you link me a good source? @Tomfh I like that shape, good. @Just Some Nerd Finding that thread would be nice.
  11. CovertShear

    Concrete Slab - Z Shape Section Detail

    @EZBuilding @BridgeSmith - Thats a valid point, but I want to do something different than U-shape bars. I feel like their development length in this case is very small. @HTURKAK - I like the idea of L-shape bars. I think i will do L-shape for the upper slab, and a U-shape for the bottom one.
  12. CovertShear

    Concrete Slab - Z Shape Section Detail

    Let me get right to it: Problem: - You have a elevation jump in a monolithic concrete slab (ceiling), or a Z-shape section if you will. - You want to detail a reinforcement for hogging bending moments M1 and M2 (perpendicular to the "jump beam"). 1) I have done this detail before using...
  13. CovertShear

    Narrow backfill pressure - posted dead link (thread 484693)

    Thank you.
  14. CovertShear

    Narrow backfill pressure - posted dead link (thread 484693)

    Link thread507-484693 Anyone has the paper linked by the user Hotmailbox in the mentioned thread ? The link: Link seems to be dead
  15. CovertShear

    monolithic slab design

    @Simlac450 ( if I use the strip method what kind of support should I use ? fixed on the edge (assuming the footing act like a rigid beam?) it’s going to give me an higher Mf then the reality though If you are hell bent on using strip method instead of FEM consider edge support pinned for...
  16. CovertShear

    monolithic slab design

    Hi have a monolithic slab to design for a costumer, 2 storeys, residential building, 75 kPa soil capacity and 30ftx30ft 75kPa soil capacity is quite bad. Is that really so? I would assume there is no underground storey, otherwise it couldn't be 75 kPa. Should I use a strip of 1 m for the...
  17. CovertShear

    Concrete Slab-to-Wall Joint Rigidity

    @HTURKAK I think you misunderstand the tunnel formwork system , which is used for bldg construction ,the walls and slab casted together .. Oh I see, of course I misunderstood the technical nomenclature.
  18. CovertShear

    Concrete Slab-to-Wall Joint Rigidity

    True.. Below find slab -edge wall connection detail . ( excerpt from Standard Method of Detailing Structural Concrete , Institution of Structural Engineers ) Oh yes, that's it, that's what I had in mind about detailing a rigid connection, but couldn't put my finger on it. Thank you. - It...
  19. CovertShear

    Concrete Slab-to-Wall Joint Rigidity

    @HTURKAK It depends on relative stiffness of slab and walls I think this is what I had in mind, do you know of any publication or a design book I could use for a "relative stiffness of 2 concrete members" research? Yeah, it only feels natural that the thicker (stiffer) the wall, the more...
  20. CovertShear

    Concrete Slab-to-Wall Joint Rigidity

    Keyway i can understand being pinned. But what if the slab isn't poured into the wall through a keyway, but poured sitting on the wall like this (pic), still pinned?

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