What is the purpose of rebar when used with core blocks?

Reinforcing steel bars, commonly known as rebar, play a crucial role when used with core blocks in construction. The primary purpose of rebar is to enhance the structural integrity and load-bearing capacity of the masonry wall system. When integrated into the core of masonry blocks, rebar helps to distribute loads more evenly, which is essential for maintaining the stability and resilience of the structure under various stresses such as wind loads, seismic activity, and other forces.

Reinforcement provided by rebar is especially important in areas where additional strength is needed, such as in shear walls or load-bearing walls. By tying together the blocks and providing tensile strength that concrete lacks, rebar effectively prevents cracking and structural failure, leading to a more durable and long-lasting building.

In contrast, options that mention reducing weight, improving aesthetics, or providing insulation do not align with the main functional role rebar plays in conjunction with masonry core blocks. The focus is on structural support rather than those other characteristics.