What is the minimum distance girders should be from the ground?

The minimum distance that girders should be from the ground is set at 12 inches to ensure adequate clearance. This clearance is essential for several reasons, including preventing moisture damage and allowing for ventilation under the structure. Proper elevation helps protect the girders from potential water intrusion, which can lead to rot and compromise the integrity of the building. Additionally, maintaining this distance enhances the overall durability of the framework and promotes better air circulation, which can further prevent mold and mildew buildup.

While other options may seem plausible, they do not meet the established code requirements, which mandate the 12-inch clearance as the standard for protecting structural components in residential construction.