To support and withstand expected loads and
To limit movement under expected loads and
OS2.1, OS2.4, OS2.5
To limit the probability that the maximum expected vertical
forces acting on the structure will cause large displacements of the structural
system as a whole or in part, or that maximum expected compressive forces
acting on structural components will cause component buckling, which could
lead to structural failure, which could lead to harm to persons.