What is the MINIMUM vertical reinforcement spacing for a reinforced concrete foundation wall that is 7 feet high and 10 inches thick on type SP soil?

In reinforced concrete design, the spacing of vertical reinforcement in foundation walls is guided by building codes and structural engineering principles that ensure the integrity and strength of the wall under various loads and conditions, especially for different soil types.

For a foundation wall that is 7 feet high and 10 inches thick, and given that it is constructed on type SP soil, the minimum vertical reinforcement spacing is critical for maintaining structural safety and performance. Type SP soil is typically a classified soil that may impose considerable lateral loads on the foundation due to factors like groundwater levels or additional loads from nearby structures.

The correct choice of 56 inches on center aligns with building code requirements for vertical reinforcement in taller walls. This spacing helps to sufficiently control cracking and provide the necessary strength to support the wall under the anticipated loads stemming from both the soil and built structures. It is important to ensure that the reinforcement is adequately spaced to prevent excessive lateral deformation and maintain stability.

Other spacing options may not provide adequate reinforcement for the height and loading conditions of the wall, potentially leading to structural issues. Therefore, choosing the minimum vertical reinforcement spacing of 56 inches on center ensures compliance with safety standards and overall structural reliability for this specific wall configuration.