In Type IV construction, the minimum nominal width and depth for wood beams and girders for floor framing are _____ inches wide and _____ inches deep, respectively.

In Type IV construction, which is often referred to as "Heavy Timber" construction, there are specific requirements regarding the dimensions of wood beams and girders used for floor framing. The correct answer indicates that the minimum nominal width for these beams and girders is 6 inches, while the minimum depth is 10 inches.

This sizing is pertinent due to the need for structural integrity and fire resistance in Type IV buildings. The minimum width of 6 inches helps ensure that the beams can bear the loads applied to them while also providing a certain level of fire resistance due to their mass. A depth of 10 inches contributes to the overall strength and stiffness of the beam, allowing it to support more weight across longer spans.

Understanding these dimensions is crucial for engineers and inspectors, as they help ensure compliance with building codes that aim to maintain safety and performance in construction. The other options suggest minimum sizes that are either too small, compromising the structural performance and fire safety of the building, or not consistent with the established standards for Heavy Timber construction.