Long Span Roofs ~ these can be defined as those exceeding 12„000
in span. They can be fabricated in steel, aluminium alloy, timber,
reinforced concrete and prestressed concrete. Long span roofs can
be used for buildings such as factories. Large public halls and
gymnasiums which require a large floor area free of roof support
columns. The primary roof functions of providing weather
protection, thermal insulation, sound insulation and restricting
spread of fire over the roof surface are common to all roof types
but these roofs may also have to provide strength sufficient to
carry services lifting equipment and provide for natural daylight to
the interior by means of rooflights.
Long Span Roofs