Diameter of bolts

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Engr Jaydee
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Diameter of bolts
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A hollow hemispherical shell is fixed to the ground by using four ordinary bolts and a steel base plate. A small tube is installed on top of it. To the tube, water is poured up to a height of 800 mm from the bottom of the shell. See figure above.

  1. Calculate the diameter of the bolts (in mm) that can safely carry an allowable bolt axial stress of 1 MPa.
  2. Calculate the diameter of the bolts (in mm) that can safely carry an allowable bolt shear stress of 500 kPa.
  3. Based on your answers in #1 and #2, suggest the best bolt diameter for the setup. Commercial sizes are 12 mm, 16 mm, 20 mm, 25 mm, 28 mm, 32 mm and 36 mm.

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