External loads, which are operating on the building or any other structure are categorized in more types:

Static loads which belong to the forces applied sluggishly and then turns out to be almost constant.
The weight, as one instance – or dead load associated with a floor or roof system.
Dynamic loads fluctuate with time. They comprise of repeated and impact loads.
Repeated loads are forces which are used several times. A good example of their use is an off-balance motor.
Impact loads which stand for forces through which energy is occupied in a short time span by a structure or its components time.
External forces are also categorized as distributed and concentrated.
Uniformly distributed loads contains a constant value like 1kN/m. The instance of this load is dead weight of a rolled-steel I beam.
External Loads Acting on Building Structure Types

Concentrated loads -of a forces containing such a small contact area that is omitted corresponding to the whole surface area of the supporting member.
External forces labeled as axial, eccentric, and torsional.
An axial load pertains to a force whose resultant goes over the centroid of a section under consideration and stands upright to the plane of the section.
 An eccentric load stands for a force that stands upright to the plane of the section under consideration but not going through the centroid of the section, therefore bending the supporting member.

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