Massachusetts Unrestricted Construction Supervisor License Practice Test

Which type of construction best describes a structure with noncombustible exterior walls and interior elements of solid or laminated wood without concealed spaces?

1. Type I

2. Type III

3. Type IV

4. Type V

The correct answer is: Type IV

The structure described in the question is best classified as Type IV construction, often referred to as "Heavy Timber" construction. This type is characterized by exterior walls made of noncombustible materials and interior components that utilize solid or laminated wood. The absence of concealed spaces is a key aspect of Type IV construction, as it reduces the risk of fire spreading within hidden areas, which is a concern in other construction types. The large dimensions of the timber contribute to a higher fire-resistance rating, making the structure safer in terms of fire safety. Understanding the classifications of construction types is crucial for compliance with building codes and ensuring safety standards. Type I is typically composed of noncombustible materials throughout, including all structural elements. Type III usually has a mix of combustible and noncombustible elements, often with concealed spaces, making it not applicable in this context. Type V consists of structures built entirely of combustible materials, which contrasts with the defined noncombustible exterior of the structure in question. Therefore, Type IV is the most accurate classification based on the provided characteristics.