Concrete Floor On Steel Beams

It is estimated that 50 of multi storey steel framed buildings use precast concrete floors.

Concrete floor on steel beams.

The precast concrete floor unit is used to span between supporting steel beams as an alternative to in situ concrete and metal decking. Erection of steel beams. This results in a floor structure similar to a concrete flat plate but does not have downward projecting beams. Precast concrete floor units are widely used in all types of building.

The mass provides a heat sink that absorbs heat during the day and then in combination with natural ventilation the heat is purged during the cooler night time. The thickness of the concrete precast units is 150 160mm for hollow units and 75 100mm for solid units. The steel girders between the columns are cambered 19 mm 3 4 in and the infill steel beams are cambered 45 mm 1 3. The floor framing plan in figure 5 depicts beam camber for both infill beams and girders.

The design of the steel beams and their connections to the columns required careful consideration to control deflections and vibrations of the floor structure. Reinforced concrete toppings are placed on the beams to connect units as can be seen in figure 11. This floor system is composed of hollow or solid precast concrete units placed on steel beams on which shear studs are welded. Exposed concrete floors supported on steel beams and used to provide thermal mass provision of sufficient thermal mass is an important part of a low energy building solution.

Various prefabricated beam sections are available to be used in the construction multi storey steel frame structure. Beams commonly transfer loads from floors and roof to the columns. The asymmetric steel beams have a wider bottom flange supporting the ends of the clt planks.