Massachusetts Unrestricted Construction Supervisor License Practice Test

Which of the following concealed spaces in a building does NOT require fireblocking?

1. Spaces of stud walls and partitions of ceiling levels

2. Between stair stringers in stairways

3. Architectural trim at a maximum of twenty feet intervals

4. Slab on grade floors on gymnasiums

The correct answer is: Slab on grade floors on gymnasiums

In the context of fire safety and construction standards, fireblocking is a critical component used to slow the spread of fire and smoke through concealed spaces in buildings. Each of the other choices listed involves concealed areas that can allow for fire to travel from one area to another, hence the requirement for fireblocking. The option noting "slab on grade floors on gymnasiums" does not require fireblocking. Slab on grade construction refers to a concrete slab that is poured directly on the ground without the use of a basement foundation or crawl space. Since this type of construction does not create a concealed space that would allow a fire to spread, there is no need for fireblocking in this situation. The solid nature of the slab itself acts as a barrier, reducing potential pathways for fire movement. The other options pertain to spaces that can create pockets where fire can travel undetected. For instance, concealed spaces in stud walls and partitions, voids between stair stringers, and areas behind architectural trim can all provide a channel for fire to propagate, therefore necessitating the implementation of fireblocking to enhance safety and compliance with building codes.