Steel Buildings - Glossary of Common Terms
Rafter
In a steel building, a rafter is main beam supporting the roof system.
In a steel building, a rafter is main beam supporting the roof system.
Rails (Door)
The horizontal stiffening members of framed and paneled doors.
The horizontal stiffening members of framed and paneled doors.
Rake
The intersection of the plane of the steel building system's roof and the plane of the endwall
The intersection of the plane of the steel building system's roof and the plane of the endwall
Rake Angle
Angle fastened to purlins at rake for attachment of endwall panels.
Angle fastened to purlins at rake for attachment of endwall panels.
Rake Trim
A flashing that closes the opening between the roof and endwall panels.
A flashing that closes the opening between the roof and endwall panels.
Reactions
The resisting forces between the column bases and foundation that keep a steel building structure in balance under a given loading condition
The resisting forces between the column bases and foundation that keep a steel building structure in balance under a given loading condition
Reinforcing Steel
Steel placed in concrete as required to carry the tension, compression and shear stresses on a steel building system.
Steel placed in concrete as required to carry the tension, compression and shear stresses on a steel building system.
Remote-Operated Crane
A crane controlled electronically by an operator from a remote location.
A crane controlled electronically by an operator from a remote location.
Retrofit
The placing of new metal roof or wall systems over deteriorated roofs or walls.
The placing of new metal roof or wall systems over deteriorated roofs or walls.
Rib
The longitudinal raised profile of a panel that provides much of the panel's bending strength.
The longitudinal raised profile of a panel that provides much of the panel's bending strength.
Ridge
The horizontal line formed by opposing sloping sides of a roof running parallel with the building length.
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.
A transition of the roofing materials along the ridge of a roof; sometimes called ridge roll or ridge flashing.
Rigid Frame
A structural frame consisting of members joined together with moment connections so as to render the frame stable with respect to the design loads, without the need for bracing in its plane.
A structural frame consisting of members joined together with 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 have wheels on the bottom that run on a track.
Doors that have wheels on the bottom that run on a track.
Roll-Up Door
A door that opens vertically and is gathered into a roll suspended above the floor.
A door that opens vertically and is gathered into a roll suspended above the floor.
Roof Covering
The bottom horizontal framing member of a wall opening such as a window or louver.
The bottom horizontal framing member of a wall opening such as a window or louver.
Roof Live Load
Loads on a steel building's roof produced by movable objects other than wind, snow, seismic or dead loads.
Loads on a steel building's roof produced by movable objects other than wind, snow, seismic or dead loads.
Roof Overhang
A roof extension beyond the endwall or sidewall of a building.
A roof extension beyond the endwall or sidewall of a building.
Roof Pitch
The tangent of the angle that a roof surface makes with the horizontal, usually expressed in units of vertical rise to 12 units of horizontal run.
The tangent of the angle that a roof surface makes with the horizontal, usually expressed in units of vertical rise to 12 units of horizontal run.
Runway Bracket
A bracket extending out form the column of a building frame, which supports the runway beam for top-running cranes.
A bracket extending out form the column of a building frame, which supports the runway beam for top-running cranes.
Runway Conductors
The main conductors mounted on or parallel to the runway, which supplies electric current to the crane.
The main conductors mounted on or parallel to the runway, which supplies electric current to the crane.