What is the fire resistance rating of Type I construction according to PD 1096?

The fire resistance rating of Type I construction, according to the National Building Code of the Philippines (PD 1096), is not applied in terms of a specific hour rating like the other options suggest. Type I construction typically refers to structures made of non-combustible materials and are designed to withstand greater fire exposure without a defined hour limitation. Essentially, Type I buildings are expected to perform exceptionally well in fire situations and have higher standards for safety, which is why it is categorized differently compared to other construction types that do have specific hour ratings.

In contrast, the other choices represent standard ratings typically applicable to other construction types, but they do not apply to Type I since that classification is meant for buildings intended to maintain integrity and stability for an extended period. Therefore, saying that Type I has "none" as a fire resistance rating is justified since it is understood to be constructed from materials that resist fire significantly better than those of lesser-rated structures.