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Panels - Gage metal sheets usually with a
ribbed configuration and used for roof and wall skin.
Parapet -
That portion of the vertical wall of a building which extends above the
roof line at the intersection of the wall and roof.
Pascal - SI
unit of measure for force per unit area (N/m2).
Peak
- The uppermost point of a gable.
Peak Panel - Formed multi-rib
panel located at the building peak.
Peak Sign - A sign attached
to the peak of the building at the end wall showing the building
manufacturer.
Personnel Doors - A door used by personnel for
access to and exit from a building.
Piece Mark - A number given
to each separate part of the building for erection identification. Also
called mark number and part number.
Pig Spout - A sheet metal
section designed to direct the flow of water out through the face of the
gutter rather than through a downspout.
Pilaster - A reinforced
or enlarged portion of a masonry wall to provide support for roof leads or
lateral loads on the wall.
Pinned Base - A column base that is
designed to resist horizontal and vertical movement, but not
rotation.
Pin Connection - A connection designed to transfer
axial and shear forces between connection members, but not
moments.
Plastic Design - A design concept based on multiplying
the actual loads by a suitable load factor and using the yield stress as
the maximum stress in any member.
Plastic Panels - See
"Translucent Light Panels"
Ponding - The gathering of water at
low or irregular areas on a roof.
Pop Rivet - See "Blind
Rivet"
Portal Frame - A rigid frame structure so designed that
it offers rigidity and stability in its plane. It is used to resist
longitudinal loads where diagonal bracing is not permitted. (Also "Wind
Bent").
Post (End Post; Corner Post) - See "End Wall
Column"
Pre-Painted Coil - Coil metal which received a paint
coating prior to the forming operation.
Press Brake - A machine
used in cold forming metal sheet or strip into desired cross
sections.
Pre-Stressed Concrete - Concrete in which the
reinforcing cables, wires, or rods in the concrete are tensioned before
there is load on the member, holding the concrete in compression for
greater strength.
Primary Frame - See "Main
Frame"
Prismatic Beam - A beam with uniform cross
section.
Purlin - A horizontal structural member attached to the
primary frames which supports roof panels.
Purlin Extension -
See "End Wall Overhang"
Rafter - The main beam supporting the roof
system.
Rails (Door) - The horizontal stiffening members of
framed and paneled doors.
Rake - The intersection of the plane
of the roof and the plane of the gable. (As opposed to end walls meeting
hip roofs).
Rake Angle - Angle fastened to purlins at rake for
attachment of end wall panels.
Rake Trim - A flashing designed
to close the opening between the roof and end wall
panels.
Reactions - The resisting forces at the column bases of
a frame, holding the frame in equilibrium under a given loading
condition.
Reinforcing Steel - The steel placed in concrete to
help carry the tension, compression, and shear stresses.
Ridge -
Highest point on the roof of the building which describes a horizontal
line running the length of the building.
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" Rigid Frame- A structural frame consisting of members
joined together with rigid (or moment) connections so as to render the
frame stable with respect to the design loads, without the need for
bracing in its plane.
Rolling Doors - Doors that are supported
on wheels which run on a track.
Roll-up Doors - See "Rolling
Doors"
Roof Covering - The exposed exterior roof skin consisting
of panels or sheets.
Roof Live Load - Those loads induced by the
use and occupancy of the building, not including wind load, snow load,
seismic load or dead load.
Roof Overhang - A roof extension
beyond the end wall or side wall of a building.
Roof Pitch -
Ratio of rise to total width.
Roof Slope - The angle that a roof
surface makes with the horizontal. Usually expressed in units of vertical
rise to 12 units of horizontal run.
Roof Snow Load - That load
induced by the weight of snow on the roof of the structure. (See
Ground Snow Load) Ropeseal- See "Sealant"
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