1、Designation:D767211a Designation: D7672 11bStandard Specification forEvaluating Structural Capacities of Rim Board Products andAssemblies1This standard is issued under the fixed designation D7672; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 of revision, 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.INTRODUCTIONRim board assemblies are an engineered component within light-frame wood platform constructi
3、on.Rim board assemblies may serve in multiple structural capacities, including: providing floor closureand diaphragm attachment, transferring vertical and in-plane lateral loads, restricting out-of-planerotation and lateral translation at the ends of the floor joists, providing deck ledger attachmen
4、t, andspanning wall openings as a header material. Rim board products, which serve a principal role as acomponent integrated within a rim board assembly, can vary by wood species, size, shape, and type.Rim board products and assemblies require evaluation of their mechanical properties, physicalprope
5、rties, and their response to end use environments. Procedures established in this Specificationprovide a means to test rim board products and assemblies, to judge their acceptability, and to establishallowable design capacities.1. Scope1.1 This specification provides procedures for testing and estab
6、lishing the structural capacities of proprietary rim board productsand assemblies for use in light-frame wood construction using I-joist or structural composite lumber joist framing. It Thisspecification does not apply to rim board products manufactured to a commodity rim board standard. products.1.
7、2 This specification was developed in light of currently manufactured panel, structural composite lumber, and pre-fabricatedI-joist rim board products as defined in 3.2. Materials that do not conform to the definitions of 3.2 are beyond the scope of thisspecification.1.3 Fire safety, sound transmiss
8、ion, building envelope performance, and cutting/notching attributes of rim board products andassemblies are all items that may need to be considered in an end-use application. These items fall outside the scope of thisspecification.1.4 This specification primarily considers end use in dry service co
9、nditions, such as most protected framing members, wherethe equilibrium moisture content for solid-sawn lumber is less than 16 %.1.5 This specification provides methods to establish “allowable stress” design resistances for use with the National DesignSpecification for Wood Construction (NDS). Deriva
10、tion of design resistances from the test data in accordance with “load andresistance factor design” or “limit states design” are beyond the scope of this specification.1.6 Quality control requirements are outside the scope of this Specification.1.7 The performance of a rim board product will be affe
11、cted by the constituent wood species, geometry, adhesive, andproduction parameters. Therefore, rim board products produced by each individual manufacturer shall be evaluated to determinetheir product properties, regardless of the similarity in characteristics to products produced by other manufactur
12、ers.1.8 Where a manufacturer produces product in more than one facility, each production facility shall be evaluated independently.For additional production facilities, any revisions to the full qualification program in accordance with this specification shall beapproved by an accredited, independen
13、t qualifying agency.1.9 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.10 This standard does not purport to address all of the safet
14、y concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.1This specification is under the jurisdiction of ASTM Committee D07 on Wood and
15、 is the direct responsibility of Subcommittee D07.05 on Wood Assemblies.Current edition approved Nov. 15, 2011. Published December 2011. Last previous edition approved in 2011 as D767211E01. DOI: 10.1520/D767211a.Current edition approved Dec. 1, 2011. Published January 2012. Last previous edition ap
16、proved in 2011 as D767211a. DOI: 10.1520/D767211b.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accur
17、ately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Stat
18、es.2. Referenced Documents2.1 ASTM Standards:2D9 Terminology Relating to Wood and Wood-Based ProductsD198 Test Methods of Static Tests of Lumber in Structural SizesD1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel MaterialsD2395 Test Methods for Specific Gravity of W
19、ood and Wood-Based MaterialsD2915 Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based ProductsD4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base MaterialsD4761 Test Methods for Mechanical Properties of Lumber and Wood-Base Structural MaterialD5055
20、 Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-JoistsD5456 Specification for Evaluation of Structural Composite Lumber ProductsD7033 Practice for Establishing Design Capacities for Oriented Strand Board (OSB) Wood-Based Structural-Use PanelsF1667 Specifi
21、cation for Driven Fasteners: Nails, Spikes, and Staples2.2 Other Standards:NDS ANSI/AF (2) attachment of the rim board to wall plates above and below; (3) attachment of the rim boardto the joist ends; (4) attachment of exterior wall siding to the rim board; and (5) attachment of any required hardwar
22、e to the face.While it is permissible to develop most of these capacities based upon the material properties established in 4.4 and the relevantdesign provisions of the NDS, the in-plane lateral load capacity of the rim assembly shall be empirically established as outlinedin this Specification. If t
23、he rim board assembly with a rectangular wood-based rim board is to be additionally qualified to supportan exterior deck ledger, then deck ledger fastener attachments must also be developed. The procedure outlined in this Specificationcan be used for the qualification of deck ledger attachments. Alt
24、ernative deck ledger attachment qualification procedures may beused in lieu of those contained within this specification provided that they consider all potential failure modes, including deckledger splitting perpendicular-to-grain.4.4 Product Specific Requirements :4.4.1 I-joist Rim Board ProductsI
25、-joist rim board products must be qualified as an I-joist framing material in accordance withSpecification D5055, have a minimum flange width of 1.5 in. (38 mm), and a minimum manufactured length of 8 ft. (2.4 m).I-joists with sawn lumber flanges shall have established fastener capacities into the f
26、ace and edge that comply with the provisionsof the NDS. I-joists with structural composite lumber flanges shall have fastener capacities established in accordance withSpecification D5456. Deck ledger attachments to I-joist rim board products fall outside the scope of this specification.4.4.2 Rectang
27、ular Wood-Based Rim BoardsRectangular wood-based rim board products shall have a minimum thickness of1.0 in. (25 mm) and a minimum manufactured length of 8 ft. (2.4 m). Additionally, they shall satisfy the following.4.4.2.1 Structural Composite LumberStructural composite lumber rim board products sh
28、all be made from a material qualifiedin accordance with Specification D5456. The axial tension and compression capacities need not be qualified for rim boardapplications unless the product will be permitted to be used as a drag strut or diaphragm chord. SCL rim board products shall havefastener capa
29、cities into the edge and face established in accordance with Specification D5456. Where a Specification D5456 testFIG. 2 Orientation for Rim BoardD7672 11b3method requires minimum specimen dimensions that exceed the product thickness, testing the rim board with its actual thicknessshall be permitted
30、.4.4.2.2 Proprietary Plywood and Oriented Strand BoardProprietary plywood and oriented strand board rim board productsshall be initially qualified in accordance with PS-1 or PS-2. In addition, when used as a structural header, the edgewise bendingperformance of proprietary plywood and oriented stran
31、d board rim board products shall be evaluated in accordance with theSpecification D5456 requirements for laminated veneer lumber or oriented strand lumber, respectively. This evaluation shallinclude, but is not limited to, relevant considerations applicable to edgewise bending, such as edgewise flex
32、ure, shear, and bearingdesign load establishment, duration of load, volume effects, moisture content, etc. The axial tension and compression capacitiesneed not be qualified in accordance with Specification D5456 for rim board applications unless the product will be used as a dragstrut or diaphragm c
33、hord. Where a Specification D5456 specified test method requires minimum specimen dimensions that exceedthe product thickness, testing the rim board with its actual thickness shall be permitted. Proprietary plywood and OSB rim boardproducts shall have fastener capacities into the edge and face that
34、either comply with published values in the NDS or have beendeveloped in accordance with Practice D7033.5. Qualification5.1 GeneralThis section describes procedures, both empirical and analytical, for initial qualification of the structuralcapacities of rim board products and assemblies. Qualificatio
35、n is required for typical details of rim board application since theyare used commonly and influence structural capacities.5.2 Qualification ProcessRim board products shall be tested in accordance with Section 6 and evaluated in accordance withSection 7. The allowable design values and durability ta
36、rgets shall comply with the limitations specified by Table 1.5.2.1 When deck ledger attachments are qualified for rectangular wood-based rim board products using the procedure outlinedin this specification, they shall comply with the limitations specified in Table 2.5.2.2 When a manufacturer chooses
37、 not to establish a concentrated vertical load capacity in accordance with the provisions 6.3and 7.3, then squash blocks or alternative detailing provisions shall be provided to address concentrated load transfer through therim board assembly.5.3 SamplingSamples for qualification testing shall be re
38、presentative of the population being evaluated. When a modificationto the manufacturing process results in a reduction in properties, new qualification testing is required. Sampling of the test materialshall be done in accordance with the applicable portions of Section 3, “Statistical Methodology,”
39、of Practice D2915.5.4 WitnessingQualification tests shall be conducted or witnessed by a qualified agency in accordance with Section 8. All testresults are to be certified by an accredited, independent qualifying agency.5.5 Moisture Content and DensityMoisture content shall be measured and reported
40、for each rim board product specimentested in the qualification program in accordance with Test Methods D4442. The moisture content of other assembly componentsdoes not need to be determined. As an alternative to testing a full cross-section, only the moisture content of the flange materialsTABLE 1 A
41、ssembly LimitationsMinimumRim BoardThicknessAUniform Vertical LoadTransfer Design Capacity(X direction)Lateral Load TransferDesign Capacity(L direction)MinimumRetainedLateralLoadTransferDurabilityBMaximumAverageThicknessSwellCMinimumDMaximum Minimum MaximumE75 % 10 %1.0 in.(25 mm)2000 plf(29.2 kN/m)
42、360 psi(2.48 N/mm2)x rim board thicknessF180 plf(2.63 kN/m)190 plf(2.77 kN/m)1.125 in.(29 mm)220 plf(3.21 kN/m)1.25 in.(32 mm)and greaterNot LimitedAFor the purposes of this table, the thickness of I-joist rim board is the flange width.BThe retained lateral load transfer durability is the ratio of t
43、he average durability lateral load transfer capacity divided by the dry lateral load transfer capacity as outlinedin 7.5.CThe thickness swell requirements apply only to rectangular rim board products. The average calculated thickness swell for all specimens from a five-panel sampleoriginally conditi
44、oned in accordance with 6.4.2 shall not exceed 10 % and no individual value may be more than 12 %.DLower uniform vertical load capacities are permitted to be qualified when the product is limited to engineered construction.EFor rim board productions having a thickness between 1 in. (25 mm) and 1.25
45、in. (32 mm), the allowable capacity shall be interpolated between the following values:1.0 in. (25 mm) 190 plf (2.77 kN/m)1.125 in. (29 mm) 220 plf (3.21 kN/m)1.25 in. (32 mm) 240 plf (3.50 kN/m)The 240 plf (3.50 kN/m) capacity for 1.25-in. thick (32 mm) rim board is added in this category for inter
46、polation purposes only.FThe 360 psi (2.48 N/mm2) stress is based upon the established compression perpendicular-to-grain design capacity of commodity floor sheathing products. Thequalified compression perpendicular-to-grain capacity of a proprietary floor sheathing is permitted to be used in lieu of
47、 this value for specific applications that combine therim board with the proprietary floor sheathing product.D7672 11b4needs to be tested for I-joist rim board products. Specific gravity shall be measured and reported for rectangular rim board productsin accordance with Test Methods D2395. As an alt
48、ernative, product density may be reported based upon the specimen weightdivided by the specimen volume at the tested moisture content.5.6 Test Equipment TolerancesTests in accordance with this specification are to be conducted using a machine or apparatuscalibrated in accordance with Practices E4.6.
49、 Mechanical Testing6.1 Uniform Vertical Load TransferThe uniform vertical load transfer capability of the rim board assembly is based upon theX-orientation compressive capacity of the rim board illustrated in Fig. 2. As specified in 7.1, the rim board vertical load capacityshall be determined based upon the lower of a direct test or calculation. Section 6.1.2 outlines the test used to directly establishthe capacity. Section 6.1.3 describes testing needed to establish the X-orientation compression strength and stiffness of the materialas required to complete the calcula
