What features do webs in masonry blocks typically have?

In masonry blocks, the webs are designed to provide structural integrity and support to the block itself. The correct assertion is that webs are normally thicker on top. This design helps distribute the load more effectively and provides better support for the block above it in a masonry wall system. A thicker top web increases the overall strength and stability of the masonry block, helping to resist compressive forces and improve the load-bearing capacity.

Webs being thicker at the top aligns with the functional requirements of masonry as they help maintain the shape and integrity of the block under various load conditions. This design is based on principles of engineering that ensure that the most substantial demand of weight and pressure can be effectively managed without compromise to the block's performance. The other options miss this critical structural principle and do not align with how masonry blocks are designed.