Gable Symmetrical is a continuous frame building with the ridge in the center of the building, consisting of tapered or straight columns and tapered rafters. Sidewall girts may be continuous, by-passing the columns or simple span, flush in the column line. Rafters may or may not have interior columns. A ridged (double slope) building in which the ridge is in the center of the building.
Gable Umsymmetrical is a continuous frame building with an off-center ridge, consisting of tapered or straight columns and tapered rafters. Eave height and roof slope may differ on each side of the ridge. Sidewall girts may be continuous, by-passing the columns or simple span, flush in the column line. Building may or may not have interior columns.
Single Slope is a continuous frame building which does not contain a ridge, but consists of one continuous slope from side to side. Building consists of straight or tapered columns and tapered or straight rafters. Sidewall girts may be continuous, by-passing the columns or simple span, flush in the column line. Building may or may not have interior columns.
Lean-to (LT) is a building extension which does not contain a ridge, but consists of one continuous slope from side to side. These units usually have the same roof slope and girt design as the building to which they are attached. All building types normally have Simple Span endwall girts flush in the column line.
Roof slope is expressed as inches of rise for each 12" of horizontal run.
Building "Width" is measured from outside to outside of sidewall girts.
Building "Eave Height" is a nominal dimension measured from the bottom of the base plate on the column to the intersection of the inside of the roof and sidewall sheets.
Building "Length" is measured from outside to outside of endwall girts.
Standard "Bay Spacing" shall be 20', 25' or 30' between frame centerlines (except at end bays) unless otherwise specified, for buildings with "A", "AM" or "R" panels.
Standard "Bay Spacing" shall be 20', 24' or 28' between frame centerlines (except at end bays) for buildings with ShadowRib® Panels.
Drawings: Manufacturer shall furnish complete erection drawings for the proper identification and assembly of all building components. These drawings will show anchor bolt settings, transverse cross-sections, sidewall, endwall and roof framing, flashing and sheeting, and accessory installation details.
Certifications: Standard drawings and design analysis shall bear the seal of a registered professional engineer upon request. Design analysis shall be on file and furnished by manufacturer upon request.
Design loads are specified and set forth in the contract, and shall be in accordance with the manufacturer's standard design practices. Design loads may include dead load, roof live loads, wind loads, seismic loads, collateral loads, auxiliary equipment loads, and/or other applied or specified loads.
Dead Load is the actual weight of the building system supported by a given member.
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.
Roof Snow Loads are gravity load induced by the weight of snow or ice on the roof, assumed to act on the horizontal projection of the roof.
Wind Loads are the loads on a structure induced by the forces of wind blowing from any horizontal direction.
Collateral Loads are the weight of any non-moving equipment or material, such as ceilings, electrical or mechanical equipment, sprinkler systems, plumbing, or ceilings.
Auxiliary Loads are dynamic loads induced by cranes, conveyors, or other material handling systems.
Seismic Loads are horizontal loads acting in any direction a structural system due to action of any earthquake.
Floor Live Loads are loads induced on a floor system by occupants of a building and their furniture, equipment, etc.
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Straight Wall Designs
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See an American Straight Steel Building Being Erected