Page 175 - directory final 2014/2015

Paints & Coatings

HOISTWAY - A shaftway for the travel of one or more elevators.
HONEYCOMB – (1) Areas in a foundation wall where the aggregate (gravel) is visible. Honeycombs can be usually be
remedied by applying a thin layer of grout or other cement product over the affected area. (2) Method by which concrete is
poured and not puddled or vibrated, allowing the edges to have voids or holes after the forms are removed.
HUB – In plumbing, the enlarged end of a pipe which is made to provide a connection into which the end of the joining pipe
will fit.
HVAC - Heating Ventilation and Air Conditioning.
HYDROELECTRIC ELEVATOR - An elevator where liquid is pumped under pressure directly into the cylinder by a pump
driven by an electric motor without an accumulator between the pump and cylinder.
I
INCOMPATIBILITY - Descriptive of two or more materials which are not suitable to be used together.
INDEMNIFICATION CLAUSE – Provision in a contract in which one party agrees to be financially responsible for specified
types of damages, claims, or losses.
INFILTRATION - The process by which air leaks into a building. In either case, heat loss results. To find the infiltration heat-
174 ing load factor (HLF), the formula to account for the extra BTU’s needed to heat the infiltrated air is:
BTU/HR = building volume x air changes x BTU/cu.ft/hr x TD (TD is temperature difference)
INSIDE DRAIN – In roofing, a drain positioned on a roof at some location other than the perimeter. It drains surface water
inside the building through closed pipes to a drainage system.

See page 180

Chamber of Construction Industry Sri Lanka Product & Material Suppliers