How much minimum end bearing is required for a steel beam on masonry?

The minimum end bearing required for a steel beam on masonry is 100 mm (4 inches). This specification is crucial for ensuring that the load from the steel beam is adequately supported by the masonry, which contributes to the stability and safety of the structure.

Adequate end bearing is important as it prevents potential structural failure by ensuring that the beam is properly anchored, distributing the load effectively into the masonry below. Insufficient end bearing could lead to localized failure or excessive deflection of the beam, compromising the integrity of the construction.

In typical construction practices and codes, the 100 mm threshold is often specified because it strikes a balance between sufficient support and practical construction methods.

Other options reflect either more than necessary or less than the code requirements, which could potentially lead to inadequate support of the beam, therefore they are not the correct choices.