0314 Fire Cut Joists with Solid Masonry Exterior Walls - Floors - Joists -

Image Text: Cross section > solid masonry exterior wall > fire cut joist > fire cut joists are designed to prevent this > concrete block foundation > concrete floor slab > square cut joist > if the end of a square cut joist loses support during a fire and falls, it can pry up the bottom of the wall causing it to topple outwards