What is one weakness of Type 5 construction?

Type 5 construction, often referred to as "wood frame" construction, presents several weaknesses that stem primarily from the materials used and the construction methods employed. One significant weakness of this type of construction is indeed its susceptibility to fire spread, both inside and outside the structure.

Due to the predominant use of combustible materials, such as wood, Type 5 buildings can easily ignite and allow flames to spread rapidly. Internally, the open design of the framing can lead to faster fire progression as fire can move through the voids and spaces created in the framing. Externally, if a fire originates, the wooden materials can ignite, allowing the flames to easily travel and potentially affect neighboring structures.

This characteristic makes Type 5 construction more vulnerable compared to other construction types that utilize non-combustible materials or incorporate design elements intended to slow the spread of fire. The emphasis on the fire spread aspect is crucial because it directly impacts fire safety considerations, both during an incident and with regard to overall building regulations and design practices aimed at mitigating fire risks.