1、Designation:D703322Standard Practice forEstablishing Design Capacities for Oriented Strand Board(OSB)Wood-Based Structural-Use Panels1This standard is issued under the fixed designation D7033;the number immediately following the designation indicates the year oforiginal adoption or,in the case of re
2、vision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONOriented strand board(OSB)wood-based structural-use panels have been used in a variety ofapplications s
3、ince the 1970s.OSB panels manufactured for use in North America generally complywith U.S.Department of Commerce Standard PS 2.Panels that comply with PS 2 are subjected tovarious kinds of qualification performance testing and ongoing quality assurance testing.While manypanel applications are specifi
4、ed simply on the basis of meeting a given“span rating”as defined in PS2,some construction and specialty applications may require a complete set of engineering designvalues.Based on the structural tests required by PS 2(flexure),along with data for other properties,a set of baseline capacities has be
5、en available since 1988.As is customary for structural-use panels,design values will be discussed in this practice in terms of design capacities rather than designproperties,where the difference is that a design property is expressed in units of stress(that is,pounds-per-square inch(newtons-per-squa
6、re millimeter)and a design capacity is expressed in theengineering units of strength(that is,inch-pounds(newton-millimeters)of bending strength capacity,pounds(newtons)of tensile capacity,and so forth).The term“design values”will be used genericallyand can apply to either properties or capacities.As
7、 uses for OSB wood-based structural-use panels extend into new applications,it becomesincreasingly important that manufacturers,qualified agencies,and regulatory bodies reference a set ofcommon,consensus-based procedures for establishment of design values.The purpose of this practiceis to provide th
8、ese common procedures.1.Scope1.1 This practice covers the basis for code recognition ofdesign capacities for OSB structural-use panels.Procedures areprovided to establish or re-evaluate design capacities for OSBstructural-use panels in flatwise and axial applications.Designcapacities for OSB structu
9、ral-use panels in edgewiseapplications,such as rim board,are outside the scope of thisstandard.Procedures for sampling and testing are also pro-vided.Design values stated as capacity per unit dimension areto be regarded as standard.Design capacities developed inaccordance with this practice are appl
10、icable to panels intendedfor use in dry in-service conditions.NOTE1This practice is based on ICC-ES Acceptance CriteriaAC-182.Relative to the scope of AC-182,this practice is limited to OSBpanels.NOTE2While this practice makes reference to PS 2,this practiceapplies similarly to products certified to
11、 other standards such as CAN/CSA O325.NOTE3OSB produced under PS 2 is rated with the“Exposure 1”bond classification.Exposure 1 panels covered by PS 2 are intended fordry use applications where the in-service equilibrium moisture contentconditions are expected to be less than 16%.Exposure 1 panels ar
12、eintended to resist the effects of moisture due to construction delays,orother conditions of similar severity.Guidelines on use of OSB areavailable from manufacturers and qualified agencies.NOTE4PS 2-10 replaced the use of nominal thicknesses with aclassification term known as Performance Category,w
13、hich is defined inPS 2 as“A panel designation related to the panel thickness range that islinked to the nominal panel thickness designations used in the Interna-tional Building Code(IBC)and International Residential Code(IRC).”Therefore,the PS 2 Performance Category should be considered equiva-lent
14、to the term“nominal thickness”used within this standard.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This international standar
15、d was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for the1This practice is under the jurisdiction of ASTM Committee D07 on Wood andis the direct responsibility of Subcommittee D07.03 on Panel Products.Current editi
16、on approved Jan.15,2022.Published February 2022.Originallyapproved in 2005.Last previous edition approved in 2014 as D7033 14.DOI:10.1520/D7033-22.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by th
