What is one primary reason for ensuring proper placement of rebar in concrete?

The primary reason for ensuring proper placement of rebar in concrete is to provide the design with the required tensile and compressive strength. Rebar, or reinforcing bar, is embedded in concrete to help manage the stresses that the structure will face over time. Concrete is strong in compression but weak in tension; the addition of rebar allows the concrete to withstand tensile forces, which are critical in bearing loads, preventing cracking, and enhancing the overall durability and longevity of the structure.

The placement and orientation of rebar are critical in achieving the design specifications laid out in engineering plans, ensuring that the concrete can perform safely under expected loads and environmental conditions. Proper placement directly affects the structural integrity and performance of the concrete, making it a vital aspect of construction practices.