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  • Users: nrjdjjs
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  1. nrjdjjs

    Stability of Footing with 2 columns

    Refer to the attached image. Column 107 has no load and 1035 has a 200 kN load. There are no external applied shears or moments on either of the columns. The footing is 0.7 m thick and its top is at grade. What is the correct way to calculate overturning and resisting moments in this footing?
  2. nrjdjjs

    Beam shear critical section on a pile

    Attached is a sketch showing a pile cap with two closely spaced pedestals, supported on two piles 1 & 2. If normal beam shear critical section in accordance with ACI 318 code is considered on either side of the two pedestals, for the given geometry configuration, it so happens that the beam...
  3. nrjdjjs

    Rigid pile cap design vs Pile cap as a continuous beam

    Attached is a picture of a pile cap showing 3 columns (indicated by 3 square red boxes) supported by a pile cap resting on 16 piles (indicated by green circles). The pile cap is 1 meter thick. Based on the arrangement of piles and supports, what would be the best method to determine shears and...
  4. nrjdjjs

    Overturning safety with buoyancy

    Need help with determining the correct factor to use to calculate the resisting moment when a foundation is subjected to buoyancy. Here are some quick sample calcs to illustrate the point: Footing dimensions:16'X20'X2' Bottom of footing below grade = 4' Soil cover = 2' Water table at grade...
  5. nrjdjjs

    Pedestal design of a hollow octagonal section

    Does anyone have a good reference to designing a hollow octagonal pedestal to support vertical vessels?
  6. nrjdjjs

    Pile supported strap footing

    Does anyone have a good reference or an example of a pile supported strap footing? I am specifically looking for answers such as: 1. When should a pile supported strap footing be considered as compared to a combined footing specifically when the footing supports two columns? 2. What is the...
  7. nrjdjjs

    Footing Stability Ratio

    If a soil supported mat supports 4 piers with 2 of the piers subjected to compressive loads and the other 2 piers subjected to uplift loads for a certain load combination, what is the correct way to calculate stability ratio about an edge of the mat? 1. Would the uplift loads contribute to the...
  8. nrjdjjs

    Mat foundation stability ratio calculation

    If a soil supported mat supports 4 piers with 2 of the piers subjected to compressive loads and the other 2 piers subjected to uplift loads for a certain load combination, what is the correct way to calculate stability ratio about an edge of the mat? 1. Would the uplift loads contribute to the...

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