Exit - A passage , channel or
means of egress from any building , storey or floor area to a street or
other open space of safety.
External wall - An outer wall of a building not being a party wall
even though adjoining to a wall of another building and also means a wall
abutting on an interior open space of any building.
Eaves - The lower edge of the inclined roof surface of a pitched
roof is termed as eaves.
Echoes - When a reflecting surface is so far away from the source
that the sound is reflected back as a distinct repetition of the direct
sound , the reflected sound is called an echo.
Efflorescence - If soluble salts are present in bricks or the
mortar , they absorb moisture from atmosphere and go into solution which
appears on the surface in the form of whitish substance as the moisture
dries out and the salts crystallise.
Extrados - It is the outer surface of an arch or the outer curve of
the arch ring. Enamel paint - It is made by adding pigments like white lead
or zinc white to a vehicle which is a varnish.
English bond - This bond consists of alternate course of headers and
strechers. In this arrangement , vertical joints in the header courses come
over each other and the vertical joints in the strecher course are also in
the same line.
Expansion joints - These joints are provided to accomodate the
expansion of adjacent building parts and to relieve compressive stress that
may otherwise develop.