the Guide - VP Buildings

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Varco Pruden Buildings Systems Guide Attachments What appearance options will be required for the building? Questions for the Customer Appearance considerations for attachments Piggyback canopy? Built-up canopy? Façade? Parapet? Soffit? Rake extension? Optimization Concepts - Appearance considerations Piggyback canopy o Piggyback canopies can be more economical than built-up canopies for canopies up to 6 ft. maximum projection. o Piggyback canopies with a soffit make a nice clean canopy by hiding all beams and secondary. Built-up Canopy o A built-up canopy requires a canopy beam and additional flashing under the canopy. o o o Not quite as clean as the Piggyback A built-up canopy can span up to 20 ft. or greater. However, on the larger spans, a lean-to is more cost efficient. A soffit can be installed under the built-up canopy but is not required. 30
Varco Pruden Buildings Systems Guide Piggyback canopies are appropriate for cantilevers up to 6’ maximum projection while built-up beam canopies can extend to larger lengths. Both have advantages to be considered. For small overhangs the Piggy Back Canopy is a better choice than the beam canopy. Piggyback canopies combined with roof extensions are cleanly trimmed and sheeted to hide primary and secondary framing. Rake or Roof extension A Rake Extension must be on an endwall. A Rake extension can be cantilevered purlins or bolt on. Generally, a cantilevered rake extension can only span up to 6’. Spans beyond 6’ require a bolt on extension. The outside edge of a rake extension does not have to be straight; they can be skewed, however, a skewed rake extension is more costly than a straight extension. A rake extension can be used with or without a soffit. Only add a soffit if it is required. Façade The open façade, if allowed, is more economical than the closed façade. The open façade is held outside of the building line and standard gutters can 31
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