Type 3 Construction

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Type III Construction Type III construction is also known as Ordinary or Masonry construction. Type III construction is the most common construction type in urban areas. Masonry is one of the oldest and simplest building materials; its use dates back thousands of years (IFSTA, 2016, p. 217) Ordinary construction consists of masonry exterior load-bearing walls that are of noncombustible construction. Interior framing, floors, and roofs are made of wood or other combustible materials. (Christopher J. Naum, 2008) The interior framing of a Type III building is protected with plaster, drywall, or other interior finish materials to provide required fire resistance. Therefore, Type III construction will have concealed combustible voids. (IFSTA, 2016, p. 227) During renovations in Type III, construction new void spaces are created. These include horizontal voids created by dropped ceilings and vertical voids through new utility chases. (Christopher J. Naum, 2008) Furthermore, the most basic masonry structure includes exterior load-bearing …show more content…

Particularly, in ceilings and cockloft area, rapid fire extension is created by the heavy fire load in the confined and open area. (Christopher J. Naum, 2008) Besides flames being undetectable in these confined spaces, it also traps superheated gases creating a possibility of a flashover in concealed spaces including between the ceiling and floors. Another hazard in Type III buildings that effect firefighting is during roof operation in the darkness, a firefighter can step off the edge of a roof or stumble over a low parapet. (IFSTA, 2016, p. 279) Furthermore, The collapse danger of the parapet wall is one of the reasons why the area directly in front of a fire building is so dangerous, and why firefighters are urged either to move inside the doorway or away from the front of the building altogether. (Christopher J. Naum,

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