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  • Users: ottles
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  1. ottles

    Water Tank Volume & Pipe Size

    Hi, a water tank will be put in the third level floor or slab. What must be the volume if gravity tank will be used so the pressure would be strong at 2nd floor and ground? It will be primarily as wet fire system. The tank won't be used for any other water applications since the building already...
  2. ottles

    Water Tank floor & roof beam support

    I'd like the water tank to be supported on the floor slab and also at the roof I-beam with each contributing half to the support capacity (the roof I-beam would have bars going down carrying half the tank load). How do I make sure the roof I-beam and floor slab has roughly equal load (or least...
  3. ottles

    Footing with cold joint

    Let's say you have concrete placement done one half of it (see the red lines) and the other top half (or rest of portion) of it placed next day. Can it affect the punching shear strength? How about one way shear strength?
  4. ottles

    short building & short period, R=1 only?

    https://www.ideals.illinois.edu/bitstream/handle/2142/17027/1_Zafar_Adeel.pdf?sequence=4 "They concluded that for a structure of a natural period less than 0.2 second (short period structures), the ductility does not help in reducing the response of the structure. Hence, for such structures, no...
  5. ottles

    Two Layers of Tension Rebar

    How often do you use two layers of tension rebars distance 1 inch apart (the 2 layers). The outer side would yield first before the inner ones. Usually how many percentage yielding of the outside side before the inner ones yield? and why is this allowed in structural books. I only want single...

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