Timber is classified into types with respect to fire-resistance. These are refarctory and non-refractory. Refractory timber does not catch fire readily while non-refractory timber catches fire readily.

A partition wall should be as light and as thin as possible. Lighter partitions, lighter will be structural elements. This will result in a better economy of building.

In a cavity wall, weep holes are provided at bottom of outer skin at an interval of 1 m. A weep hole is a small opening that allows drainage of water. They are usually located at bottom so as to ensure proper drainage.

In reinforced brick partitions, thickness of wall is kept equal to 10 cm. They are used when a better longitudinal bond is needed and when partition has to support super-imposed loads.

In precast concrete partitions, generally, cement mortar (1:3) is used for jointing. Precast T-shaped or L-shaped units are used for concrete partitions and a lightweight partition is obtained.

Wired glass, bullet-proof glass and three-ply glass are all strong varieties of glass. However, ordinary glass is weak. It needs frequent replacement as well.

Sawdust is added to gypsum used in making plaster slab in order to reduce its weight. Instead of sawdust, or fibrous material may be used. Plaster slabs are good insulators of heat and sound.

Cavity wall is comprised of two separate walls. These are called leaves. They are also known as skins. There is a cavity between se leaves. Hence, se are called cavity walls.

In a brick cavity wall, inner and outer leaf is half brick thick. However, if superimposed loads are very heavy, n thickness of inner leaf is increased in multiple of half brick thickness.

In stud partitions, re are vertical members called studs and horizontal members called noggings. A stud of short length is known as puncheon. It is usually provided on an opening.