"R" - Glossary of Post Frame Industry Terms

A B C D E F G H I J K L M N
O P Q R S T U V W X Y Z

Rafter - A sloping roof framing member.

Rake - The part of a roof projecting over the endwalls. In the absence of an endwall overhang, the rake is the line along the endwall formed by the intersection of the wall and roof planes.

Rake Trim - A flashing designed to close the opening between the roof and endwall panels.

Reactions - The resisting forces at the column bases of a frame, holding the frame in equilibrium under a given loading condition.

Residential Overhead Door (or Overhead Door) - Consists normally of a combination 21" or 24" height raised steel panels, the width of the door opening.

Ridge (or Peak) - The highest point of the roof, 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.

Roof Live Load - Those loads induced by the use and occupancy of the building, not including wind, snow, seismic or dead loads.

Roof Overhang - The portion of the roof extending beyond the sidewalls and/or endwalls of a building.

Roof Snow Load - Vertical load from weight of snow applied to the horizontal projection of the building roof. Influenced by a number of factors besides ground snow load, including roof slope, temperature and coefficient of friction and wind exposure.

Roof Truss - An engineered building component functioning as a structural roof support member. Made up of three or more members, with each member designed to carry a tension or compression force. Assembled from wood members, metal connector plates and/or other mechanical fasteners, designed to carry the roof truss weight as well as superimposed loads. The truss members form a semi-rigid structural framework and are assembled so the members form triangles. Attached to the wall columns, they compose the post frames of a post frame building, are the primary structural elements and part of the windforce-resisting system.

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