User guide

www.muellerinc.com
H-5
METAL BUILDING TERMS AND DEFINITIONS
Hot-Rolled Shapes: Steel sections (angles,
channels, H-beams, etc.) which are formed by rolling
mills while the steel is in a semi-molten state.
ICBO: International Conference of Building Officials.
Impact Load: An assumed dynamic load resulting
from the motion of machinery, elevators, craneways,
vehicles, and other similar moving forces.
Impact Wrench: An electric or pneumatic device
used to tighten nuts on bolts.
Insulation: Any material used in building
construction to reduce heat transfer.
Internal Pressure: Pressure inside a building
that is a function of wind velocity, and number and
location of openings.
Jack Beam: A beam used to support another
beam or truss and eliminate a column support.
Jack Truss: A truss used to support another truss
or beam and eliminate a column support.
Jib Crane: A cantilevered boom or horizontal beam
with hoist and trolley. This lifting machine may pick
up loads in all or part of a circle around the column
to which it is attached.
Jig: A device used to hold pieces of material in a
certain position during fabrication.
Kick-Out (Elbow): (Turn-out) a lower downspouts
section used to direct water away from a wall.
Kip: Unit of measure equal to 1,000 pounds (4.4 KN).
Knee: The connecting area of a column and rafter
of a structural frame such as a rigid frame.
Knee Brace: A diagonal brace designed to
resist horizontal loads usually from wind or moving
equipment. This member normally has the lower
end connected to a column and the upper end
connected to an eave strut.
Lean-to: A structure such as a shed, having only
one slope or pitch and depending upon another
structure for partial support.
Leveling Plate: A steel plate used on top of a
foundation or other support on which a structural
column can rest.
Liner Panel: A panel applied as an interior finish.
Live Load: Live load means all loads, including
snow, exerted on a roof except dead, wind and
lateral loads.
Load Indicator Washer: A washer for high-
strength bolts in which pre-tension load can be
measured as a function of amount of compression
on raised portions of the washer.
Loads: Anything that causes a force to be exerted
on a structural member. Some different examples are:
A. Dead Load
B. Impact Load
C. Roof Live Load
D. Seismic Load
E. Wind Load
F. Crane Load
G. Collateral Load
H. Auxiliary Load
Louver: An opening provided with fixed or
movable, slanted fins to allow the flow of air.
Main Frame: An assemblage of rafters and
columns that support the secondary framing
members and transfer loads directly to
the foundation.
Manufacturer: A party who designs and
fabricates a Metal Building System.
Manufacturer’s Engineer: An engineer
employed by a manufacturer who is in responsible
charge of the structural design of a Metal Building
System fabricated by the manufacturer. The
manufacturer’s engineer is typically not the Engineer
of Record.
Masonry: Anything constructed of materials
such as bricks, concrete blocks, ceramic blocks
and concrete.
MBMA: Metal Building Manufacturers Association.
Metal Building Fiber Glass Insulation: A
grade of fiberglass insulation blanket specifically
manufactured for lamination to a vapor retarder.