7. OPENINGS
- Openings are normally provided in the walls as door, windows and ventilators.
Doors provide access; windows and ventilators provide light and ventilation.
- Lintels are constructed just above the openings. It is normally a stone slab or a concrete slab.
- Sill is the part of the wall that is just below the window.
Lintels are constructed to hold up the walls above the openings. In earthquake prone areas a continuous lintel beam is provided all over the walls.
8. STAIRS
- A stair is a sequence of steps and it is provided to afford the means of ascent and descent between the floors and landings.
- The apartment or room of a building in which stair is located is called staircase. The space or opening occupied by the stair is called a stairway.
- There are different kind of stairs are used in buildings, like RCC stair, wooden stair, metal stair, brick stair etc.
9. ROOF
- The roof provides protection for the building and the people living in it. The roof rests on the walls and requires proper anchoring so that wind and other mechanical impact cannot destroy it. A roof can have different shapes but it is always either flat or sloping.