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Standard Guide for Evaluating System Effects in Repetitive-Member Wood Assemblies
NORMA vydaná dňa 1.11.2017
Označenie normy: ASTM D6555-17
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.11.2017
Kód tovaru: NS-802787
Počet strán: 9
Približná hmotnosť: 27 g (0.06 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
ICS Number Code 91.080.20 (Timber structures)
1. Scope | ||||||||
1.1 This guide identifies variables to consider when evaluating repetitive-member assembly performance for parallel framing systems. 1.2 This guide defines terms commonly used to describe interaction mechanisms. 1.3 This guide discusses general approaches to quantifying an assembly adjustment including limitations of methods and materials when evaluating repetitive-member assembly performance. 1.4 This guide does not detail the techniques for modeling or testing repetitive-member assembly performance. 1.5 The analysis and discussion presented in this guideline are based on the assumption that a means exists for distributing applied loads among adjacent, parallel supporting members of the system. 1.6 Evaluation of creep effects is beyond the scope of this guide. 1.7 This guide does not purport to suggest or establish appropriate safety levels for assemblies, but cautions users that designers often interpret that safety levels for assemblies and full structures should be higher than safety levels for individual structural members. Note 1: Methods other than traditional safety factor
approaches, such as reliability methods, are increasingly used to
estimate the probability of failure of structural elements.
However, the extension of these methods to assemblies or to
complete structures is still evolving. For example, complete
structures will likely exhibit less variability than individual
structural elements. Additionally, there is a potential for
beneficial changes in failure modes (i.e., more ductile failure
modes in systems). These considerations are beyond the scope of
this guide.
1.8 The values stated in inch-pound units are to be regarded as the standard. The SI equivalents are approximate in many cases. 1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 1.10 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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2. Referenced Documents | ||||||||
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