Which of the following statements is NOT true regarding code requirements for areas with pressure preservative treated or decay-resistant lumber?

In the context of building codes and requirements for areas that use pressure-preservative treated or decay-resistant lumber, it’s important to understand the specific guidelines for wood components that are in proximity to ground.

The statement regarding bottom of wood girder beams needing to be closer than 14 inches to exposed ground is not true because, according to standard code requirements, wood girders are typically required to be at least 18 inches above the grade. This height helps to prevent moisture accumulation and potential decay, especially in environments where the ground could become saturated.

On the other hand, the correct statements regarding the positioning of other types of wood components emphasize the need for sufficient clearance from ground contact to mitigate decay risks. Joists are regulated to be not closer than 18 inches to exposed ground, siding is required to be at least 6 inches above the ground to protect against moisture and pests, and sills and sleepers must indeed be supported by concrete slabs for better moisture control.

These regulations reflect a significant understanding of the risks associated with moisture and ground contact, which inform best practices in the construction and inspection of buildings.