Dictionary of Interior Designing

Oblique-shouldered joint - These joints are commonly adopted in timber truss construction where members are jointed in acute or obtuse fashion.

Oil bound distemper - It is a form of distemper in which the drying oil is rendered mixable with water. When required , it is diluted with water.

One-pipe system - In this system , all soil and waste fitting discharge into a single pipe termed as soil cum waste pipe and a separate vent pipe is provided to which all floor traps are connected for ventilation of the system.

Open newel stair - It consists of two or more straight flights arranged in such a manner that a clear space called a ‘well’ occurs between the backward and the forward flights.

Outlet pipe - This pipe is installed at 3 to 5 cm above the floor of the tank. The pipe is always provided with a stop valve to stop supply of water to downtake pipe.

Over flow pipe - This pipe is provided a little above the inlet pipe to allow the incoming water to overflow in case the ball valve assembly does not function properly and it is not able to shut off the incoming supply of water.

Oxide of iron - It is a pigment produced from haematite ore. The pigment is obtained by grinding and levigating the red or brown haematite.