STEEL BUILDINGS GLOSSARY

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Partition
A non-load bearing interior dividing wall. It can sustain its own weight but does not support the ceiling or roof and is designed to withstand a maximum lateral load of 0.25 kN/m?

Personnel Door
An access door.

Pinned Base
A column base that is designed to resist horizontal and vertical movement, but not rotation.

Pitch (Roof)
Slope of the roof

Post-and-Beam Endwall
A system of endwall framing consisting of vertical columns (posts), with pinned ends, which support rafters (beams). These posts and beams are normally light members made from cold-formed sections.

Pre-Engineer
To design and detail components beforehand.

Pre-Fabricated
To fabricate parts in the shop beforehand. To manufacture standard sections that can be rapidly assembled.

Primary Framing
The main load carrying members of a structural system, generally the columns, rafters, and/or other main support members.

Purlin
A horizontal secondary structural member, bolted to the rafters, which transfers the roof loads from the roof covering to the primary frames.

Reinforcing Steel
The steel placed in concrete as required to carry the tension, compression and shear stresses.

Ridge
The peak, or highest point of a gabled building, which describes a horizontal line running the length of the building.

Ridge Connection
A connection, between two rafter members, which transfers the moment from one side of the connection to the other and maintains, under application of load, the same angle between the connected members that exists prior to the loading.

Ridge Ventilator
The ventilator used at the ridgeline.

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 imposed loads, without the need for bracing in its plane.

Rigid Frame Endwall
A system of endwall framing where the main interior frame is used at the endwall mostly for the purpose of future expansion.

Roll-Up Door
A door, which opens vertically and is supported on a shaft or drum and runs along vertical tracks; typically used on RV garages , warehouse buildings , steel shop buildings and with steel garage kits

Roof Live Load
Loads that are produced (1) during maintenance by workers, equipment, and materials, and (2) during the life of the structure by movable objects and do not include wind, snow, seismic or dead loads.

Roof Overhang
A roof extension beyond the end wall or sidewall of a building.

Roof Slope
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.

Roof Snow Load
That load induced by the weight of snow on the roof of the structure. Usually obtained by taking a fraction of the "Ground Snow Load".

Roof Slope
Is expressed as inches of rise for each 12" of horizontal run.

Roof Live Loads
Are loads produced by maintenance activities, rain, erection activities, and other movable or moving loads by not including wind, snow seismic, crane, or dead loads.

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