Construction Joints:

Construction joints are the temporary joints given between subsequent concreting operations. The situation of construction joints should be predetermined before starting of concreting operations. The joint should be horizontal in walls and columns and should be arranged at such a level to coincide with the general architectural features so that it does not look odd. In columns, the concrete should be filled up to a few inches below the junction of beams. The joint should be made at the point of minimum shear in beams and slabs. Concrete should be poured in one stretch till construction joint is reached. The construction joint must not be provided at the point of maximum bending moment within any case. Badly made and poorly completed construction joint will give an ugly appearance to the construction therefore it must be properly finished. The joints must be made at such places that the concrete comes under least maximum bending moment and shear force.