Structure Fire - Types

Types

Structures are divided into five construction types for the purposes of firefighting, and are listed from least combustible to most combustible:

Type I: Fire Resistive Typically used in high-rises. The material comprising the structure is either inherently able to withstand significant exposure to fire (concrete), or in which a fire resistive covering is applied to steel structural members.
Type II: Non-combustible Typically used in strip shopping center malls. Roofs are constructed out of steel rafters.
Type III: Ordinary construction Brick and mortar walls, wood frame floors. City rowhouses are where this type of construction is most often found.
Type IV: Heavy timber Often used in churches or other community-based buildings.
Type V: Wood frame Typically used in recent construction of single-family dwellings, townhouses, garden apartments with four floors or less.

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