Walls are the mosi essential componens of a building. The primary function of the wall is to endose or divide space of the building to make it more functional and useful. Walls provide privacy, afford security and give protection against heat, coid, Sun and ram. Walls may be either load bearing or non-load bearing. Load bearing walls are those which are designed to carry the super-imposed loads (transferred through roofs), in addition to their own (self) weight. Non-load bearing walls carry their own load only. They generally serve a divide walls or partilion walls. Wall may be of several types, such as cavity walls, party walls, partittion walls, dwarf walls, retaining walls
A column is an isolated vertical load bearing member, the width of which is neither less than its thickness nor more than four times its thickness. A pier is a member similar to a column except that it is bonded into load bearing wall at the sides to form integral part and extends to the fuli height of the wall. A pier is used to increase the stiffness of the wall to carry additional load or to carry vertical concentrated load.