Nahani trap - Trap provided in
floors to collect used water from floors of bathroom , kitchen or washing
floor etc. are known as Nahani traps.
New concrete - The concrete developed based on new concept has been
termed as new concrete.
Newel - It is a wooden or metallic post supporting the hand rail
and is usually provided at the hand , foot or at points where the balustrade
changes its direction.
Nippers - This is another device for lifting stones. The pointed
ends of the nippers are inserted in the holes made little below the stone
top face and the stone block is raised by attaching a chain to the central
ring of the nipper assembly.
Nogging of bricks - It consists of brick work built within a
framework of wooden members. The frame work consists of vertical posts
called studs and held in position by horizontal members called nogging
pieces.
Nosing - The outer projecting edge of a tread is termed as nosing.
Nosing is usually rounded to give good architectural effect to treads and
makes the stair-case easy to negotiate.
Notching joint - This joint is commonly provided at the junction of
two members meeting at right angle. It consists in cutting a depression to
the full width of one member to enable it to be fixed to another member.
Nut oil - It is a cheap vehicle and generally used for painting
ordinary works of temporary character. It is colourless , less durable and
it dries very quickly.