Which type of construction is associated with the highest fire resistance rating?

The type associated with the highest fire resistance rating is masonry construction. This type is typically made from non-combustible materials such as bricks, concrete, or stone, which are known for their ability to withstand high temperatures without igniting or collapsing. This inherent property allows masonry structures to maintain their integrity during a fire, offering significant fire resistance compared to other construction types.

Wood construction, on the other hand, is made primarily from combustible materials. While it can be treated for fire resistance, it generally offers a lower fire rating because wood burns and can lead to structural failure more quickly than non-combustible materials. Steel construction, while also providing good fire resistance due to its structural integrity, can lose strength when exposed to extreme heat, making it less fire-resistant than masonry without additional fireproofing measures. Type V construction, commonly associated with wood-frame buildings, has the lowest fire resistance rating due to its use of combustible materials.

Masonry construction stands out for its ability to create durable, fire-resistant structures that can better protect occupants and property during a fire incident.