ABSTRACT
The layout of the floor framing depends on the shape and structural system used for the building. In steel-framed structures, the column arrangement defines the flooring divisions. Primary beams frame between the columns and may form part of the main vertical structural frames. Depending on spans, secondary beams may be provided to subdivide the intercolumn areas. Column spacings normally vary from 4 to 8 m in rectangular-shaped buildings but can be much greater. Secondary beams are normally spaced at 3 to 4 m centres.
