"I" Beam
See "S" Shape.
IBC
International Building Code.
ICBO
International Conference of Building Officials.
Ice Dam
A buildup of ice that forms a dam on the roof covering along the eave of the building.
IECC
International Energy Conservation Code.
Impact Load
A dynamic load resulting from the motion of machinery, elevators, craneways,
vehicles, and other similar moving forces. See Auxiliary Loads.
Impact Wrench
A power tool used to tighten nuts on bolts.
Importance Factor
A factor that accounts for the degree of hazard to human life and damage to property.
Insect Screen
Wire mesh used to prevent insects from entering the building through ventilators,
louvers, or other openings.
Insulation
Any material used in building construction to reduce heat transfer.
Internal Pressure
Pressure inside a building caused by wind acting on the building porosity.