dead load is the load of weight that is on the floor that is
part of the construction of the house
live load is the weight you add to it as in people furniture
etc,
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Live load is the external load coming on the structure. It is
also called as Imposed load.
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Dynamic Load The "load" is the total force and weight that a
structure such as a bridge is designed to withstand. For a bridge,
the total load includes the "dynamic" loads of traffic, people,
wind, snow, and ice and the "static" load of the bridge's own
weight.