structural steel normally expereriances quite a number of forces,laterial and axial compressive force.All this forces has got direct impact on the structural member of a given structure.
The baseplateconncetion is greatly influence by the unique behavoure of the none shrinkage grout when introduce to it.When a grout is introduced in between the baseplate and the pedestal of the footing,Once its subject to laterial force due to earthquake,the grout introduces a double strut that help reduce the overturning effect which woud inturn course the I-Beam to fail.
structural ideas 