Types of settlement:
There are three types of settlement.
the whole structure settles down uniformly. No crack or even collappse occurs in this case.
When a corner of the structure settles down this is called as tipping settlement. Generally no crack develops in this case but cracks can appear in some cases. This type of settlement occurs due to uneven compaction of the soil.
In this settlement process, different parts of the structure goes down different degree of settlement and severe cracks occur in different degrees and in different portions of the structure.