Metal building terms and definitions – Mueller Pre-Fab User Manual
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MeTal bUIlDInG TeRMs anD DefInITIons
Moment:
The tendency of a force to cause rotation
about a point or axis .
Moment connection:
A connection between two
members which transfers the moment from one side
of the connection to the other side, and maintains
under application of load the same angle between the
connected members that exist prior to the loading .
Also, a connection that maintains continuity .
Moment of Inertia:
A physical property of a
member, which helps define strength and deflection
characteristics .
Monolithic construction:
A method of pouring
concrete grade beam and floor slab together to form
the building foundation without forming and pouring
each separately .
Monorail:
A single rail support for a material
handling system . Normally a standard hot-rolled
H-Beam .
Multi-span building:
Buildings consisting of
more than one span across the width of the building .
Multiple gable buildings and single gable buildings
with interior posts are examples .
oil canning:
A waviness that may occur in
flat areas of light gage, formed metal products .
Structural integrity is not normally affected by this
inherent characteristic and therefore is only an
aesthetic issue .
overhead Doors:
See “Sectional Overhead Doors”.
Parapet:
That portion of the vertical wall of a
building that extends above the roof line .
Peak:
The uppermost point of a gable .
Personnel Doors:
A door used by personnel
access to and exit from a building .
Pier:
A concrete structure designed to transfer
vertical load from the base of a column to the footing .
Pin connection:
A connection designed to
transfer axial and shear forces between connecting
members, but not moments .
Pitch:
The peak height of a gabled building divided
by its overall span .
Portal frame:
A rigid frame so designed that if
offers rigidity and stability in its plane . It is generally
used to resist longitudinal loads where other bracing
methods are not permitted .
Post:
See ”Column”.
Post and beam:
See “Beam and Column”.
Pre-painted coil:
Coil of metal that has received
a paint coating .
Primary framing:
See “Main Frame”.
Public assembly:
A building or space where 300
or more persons may congregate in one area .
Purlin:
A horizontal structural member that
supports roof covering .
Rafter:
The main beam supporting the roof system .
Rake:
The intersection of the plane of the roof and
the plane of the endwall .
Rake angle:
Angle fastened to purlins at rake for
attachment of endwall panels .
Rake Trim:
A flashing designed to close the
opening between the roof and endwall panels .
Reactions:
The resisting forces at the column
bases holding the structure in equilibrium under a
given loading condition .
Rib:
The longitudinal raised profile of a panel that
provides much of the panel’s bending strength .
Ribbed Panel:
A panel that has ribs with sloping
sides and forms a trapezoidal shaped void at the
side lap .
Ridge:
The horizontal line formed by opposing
sloping sides of a roof running parallel with the
building length .
Ridge cap:
A transition of the roofing materials
along the ridge of a roof; sometimes called ridge roll
or ridge flashing .
Rigid connection:
See “Moment Connection”.