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The floor of the main cargo hold is limited to 4 000 N/m². It is planned to load a cubic container each side of which measures 0.5 m. It's maximum gross mass must not exceed: (assume g = 10 m/s²)
  • A
    1 000 kg
  • B
    100 kg
  • C
    500 kg
  • D
    5 000 kg

Floor loads and aircraft weights are occasionally given in Newtons (N). A Newton is a unit of a force and 1 kg equates to 9.81 N, or roughly 10 N.

The conversion factor "assume g = 10 m/s²", means "assume there are 10 N in a kilogram".

Thus, the distribution load intensity can be converted from N/m2 into kg/m2: 4 000 N/m² / 10 = 400 kg/m2.

There are two floor loading limits to be considered:

  • The distribution load intensity, either floor area or contact area.
  • The running (linear) load.

The Maximum Distribution Load Intensity is the maximum static mass per unit area, which the floor is designed to continuously carry and can be calculated by dividing the maximum load by the floor area it covers or the contact area: Maximum Distribution Load Intensity = Max Load / Contact or Floor Area.

Solving the above the formula for Max Load, we get: Max Load = Maximum Distribution Load Intensity x Contact Area = 400 kg/m2 x (0.5 m)2 = 100 kg.

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