Which type of construction involves masonry and steel construction with a lower fire resistance rating than Type V according to PD 1096?

The correct response identifies Type IV construction, which is characterized by heavy timber and masonry with a specified lower fire resistance rating than Type V construction. According to PD 1096, Type IV construction often utilizes materials such as steel and masonry, offering a unique combination of strength and aesthetic appeal. However, its fire resistance is notably lower than Type V, which typically includes materials with strong fire-retardant qualities, such as wood frame construction.

Type II construction primarily involves non-combustible materials, thereby providing different fire resistance characteristics, while Type III construction includes exterior walls of non-combustible materials with an interior that can be made of combustible materials, but does not utilize heavy timber formally associated with Type IV. Lastly, Type V construction is generally the most flexible in terms of material use but has a higher fire resistance rating than Type IV.

Understanding these categorizations of construction types is crucial for compliance with building codes and ensuring the safety and performance of structures.