Metal Building Vehicular-Access Door Wind Analysis and Design
Publication: Practice Periodical on Structural Design and Construction
Volume 21, Issue 2
Abstract
An analysis-based vehicular-access door design protocol for pre-engineering metal buildings is introduced. Existing access door curtain and jamb design approaches are viable for rigid door jambs. However, it was shown with experiments that wind-lock forces decrease and door out-of-plane deflection increases when the door jamb and framing are more flexible (e.g., in the case of typical cold-formed steel-framing details in which a C-section jamb is discretely braced by wall girts). A beam strip model based on an Euler–Bernoulli elastica solution is implemented in a freely available wind-analysis computer program that considers jamb and framing flexibility. This tool is integrated with an access door design protocol that provides designers both door serviceability and jamb strength limit-state checks that are explained with step-by-step videos and spreadsheets. Maximum and minimum values for the wind-lock spacing, wind-lock gap, and door curtain moment of inertia are provided for various door spans to accommodate situations in which the door jamb and framing design must be completed before the door type is selected.
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Acknowledgments
The authors are appreciative of the support they received throughout this project from the MBMA, especially the thoughtful advice from the steering group. Mr. Jerry Hatch of NCI Building Systems, Inc., provided valuable guidance throughout the test program. Coordination with the sponsor was provided by Dr. Lee Shoemaker and Mr. Dan Walker of the MBMA. Mr. Joe Hetzel of the DASMA provided important input regarding access door design procedures and details. Dr. Raymond Plaut, Professor Emeritus in the Civil and Environmental Engineering Department at Virginia Tech, assisted in the elastica beam equation derivations used to predict access door behavior.
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Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 21 • Issue 2 • May 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jan 28, 2015
Accepted: May 29, 2015
Published online: Jan 22, 2016
Published in print: May 1, 2016
Discussion open until: Jun 22, 2016
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