An attempt is made to study the effect of camber on the behavior (deflection and failure load) of single span portal frames under concentrated load. Two types of cambering were used, the first by cambering both top and bottom surfaces of the beam and the second by cambering the bottom surface only (the top surface is kept leveled) which is more acceptable from point of view of uniformity of super imposed dead load distribution.
There is a considerable effectiveness of the camber on the failure load compared with straight beams (without camber). Also, there is effectiveness considering )dead+live( load deflections for cambered beams compared with straight beams.
Keyword : Membrane Action, Camber, Concentrated Load, Deflection, Failure.