Composite development is a method whereby a concrete floor slab is utilised as part of the beam system. The slab serves as a concrete flange to the beam. As the beam and slab are of different materials, the size of the concrete flange is scaled down by using a modular ratio where the young's modulus of metal is divided by the young's modulus of concrete. When both of these elements bend, the top of each aspect is within compression and the bottom in tension. As the lower part of the concrete..