Research Article
Sep 1978
Glulam Design Criteria for Temporary Structures
Authors: Lawrence I. Knab, AM.ASCE, and Russell C. MoodyAuthor Affiliations
Publication: Journal of the Structural Division
Volume 104, Issue 9
Abstract
If temporary structures having lives of 2 yr-5 yr are designed using criteria for permanent structures with lives of 50 yr-75 yr, overly conservative design can result. This paper presents a systematic, rational basis for developing criteria for glued-laminated timber temporary bridges and buildings. Second moment reliability theory, which requires estimates of the mean and coefficient of variation of resistance and load, is used to compute measures of safety, called safety index values. These index values are computed for permanent and temporary structural elements. Allowable stresses for temporary structures are determined by choosing corresponding safety index values that will provide adequate safety relative to the safety of permanent structures, while reflecting the temporary nature of the structures. Examples of how allowable flexural stresses are developed for bridges and building are given.
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Published In
Journal of the Structural Division
Volume 104 • Issue 9 • September 1978
Pages: 1485 - 1494
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Sep 1978
Published online: Feb 1, 2021
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Authors
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Lawrence I. Knab, AM.ASCE
Research Civ. Engr., Structures and Materials Div., National Bureau of Standards, U.S. Dept. of Commerce, Washington, D.C.
Russell C. Moody
Research Project Leader, Engrg. Wood Structures, Forest Products Lab., U. S. Dept. of Agr., Madison, Wisc.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.