|Service Provider||Shear connector Stud Welding|
Beams that bend under floor loading have a certain bending stress capacity and this capacity is a maximum (other parameters being the same) when the beam is held laterally so that the compressive stress in the top flange does not cause the beam to buckle.
In Industrial buildings, where the floor consists of chequered steel plates, these plates are intermittently welded to the top flange of supporting steel beams and they offer all the lateral restraint that is required so that the beam is used optimally.
However in buildings where the floors consist of concrete slabs resting on top of the steel beams, the slabs cannot on their own offer the required lateral restraint.
You need to connect the slab to the beam tops using "shear connectors". These can be of various shapes, usually a stud in USA, or a hook in some countries that are welded to the steel beam tops at intervals all along the span of the beam.
These pieces of steel are called Shear Connectors.