Roof is one of most important building structures which provides safety and protect occupants from sun light, storms and rain. Basic types of a room designs are Flat roof, Shed roof, Gable roof, Hip roof, etc.

In architecture, a Plinth (from Greek plinthos, ?brick?) is base or platform upon which a column, pedestal, statue, monument or structure rests.

There are over 2300 species of termites but only about 4% of termite spaces are responsible for damage of buildings. The termites live in a colony and y are very fast in eating wooden and or cellulosic materials as food.

Slip joints are situated on boundary of independent units and y help in localising effect of unequal settlement in affected portion of structure only.

Generally plinth level is provided at about 300 to 400 mm above finished ground level. It is suggested that plinth level should be decided by considering top level of ground and hence considering level.

A floor typically consists of a support structure called a sub-floor on top of which is laid a floor covering to provide a working surface. The floor is actually constructed above plinth.

Ventilation is essential in every building. The main cause of insisting proper ventilation in industrial buildings is to control dust and or impurities from entering into building rooms.

Foundation is laid below ground level and it is in direct contact with sub-strata and transmits all loads to sub-soil. The structure below ground level is also known as Substructure or Foundation (excluding plinth).

Different floors divide building in two different levels to provide more accommodation on a given plot of land. The floor of a building immediately above ground is known as ground floor.

Stepped foundation is adopted when construction becomes uneconomical to provide foundations at same level. In this, minimum depth of 800 mm should be provided at all points.