Document 2Roy9bMr4kNYOx4aZogz1Yn65

FIRE PROTECTION within this type of structure is on essential part of maintaining safety to bfe and prop erty The amount of combustible material u any one portion of the building should be limited, and the use, handling, and storage of flammable and combustible liquids should be controlled The budding should be protected both horizontally and vertically from rapid spread of fire or smoke between sections of the building or floors and through wall open ings, elevator shafts, stair wells, ventilating ducts, and pipe lines (see Fig 33-2) Verti cal and horizontal openings should be en closed and fire-resishve materials used in the mam structural elements Buildings of the heavy timber construc tion type have bearing walls and bearing partitions of walls that are made of non combustible materials and have a minimum fire resistance rating of two hours with stability under fire conditions (Fig 33-3) Nonbeanng extenor walls are also noncombustible Columns, beams and girders are composed of large, heavy timbers with floors and roofs constructed of wood plank ing This type of construction, by virtue of the size and mass of timbers and wood CANT STRIP WOODEN 'ALL PLATE ANCHOREO TO WALL SCUPPER TO AIN FIDO0 CONCRETE FLOOR ONCRETE PIER Fig. 33-3. Components of a heovy timber budding showing floor froming ond identify ing components of a type known as semimill Courtesy Nations) Firs Protection Allocation 33-5