Barrel bolt - This type of bolt is similar to tower bolt except that the stapples are replaced by a barrel.
Buttress - It is similar to a pier built on the exterior of a wall and properly binded to it. Buttresses are placed at intervals along wall to make it stable for resisting outward.
Bulking of sand - When dry sand comes in contact with moisture , thin film is formed around the particles , which causes them to get apart from each other. This result in increasing the volume of sand. This phenomenon is known as bulking of sand.
Building line - The line upto which the plinth of a building adjoining a street or extension of a street or on a future may lawfully extend.
Cabin - A room constructed with non-load bearing partitions with adequate provision of light and ventilation.
Cement - Cement in broadest term means any substance which acts as a binding agent for materials. Cement as applied to contruction and engineering is produced by calcining at high temperature an intimate mixture of calcareous , siliceous and aluminous substances and crushing the resulting clinkers to a fine powder.
Caisson - A caisson may be defined as a watertight structure made up of wood , steel or reinforced concrete , constructed in connection with excavation for foundation of bridges , piers.
Capital - In making of the columns , at their head the columns are enlarged so as to form a suitrable diameter of a particular span. This flared up portion of column head is called capital.
Cast-in-situ piles - The piles which are cast in position inside the ground are called the cast-in-situ piles.
Cavity wall - This consists of two walls so they form a cavity in between. The outer wall is half brick width and the inner wall is sufficiently thick.