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Wood I Beam™ Joists

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Wood I Beam™ Joists Wood I Beam™ Joists GPI Series (LVL Flanges) WI Series (Lumber Flanges) All Wood I Beam joists have an enhanced OSB web. Referenced dimensions are nominal and used for design purposes. Not all products are available at all distribution centers; contact Georgia-Pacific for product availability. 4 Engineered Lumber Residential Guide Georgia-Pacific Wood Products, January 2012 Greater load-carrying capacity, firmer-feeling floors Lightweight and cost effective, WI More stable floors and GPI Series Wood I Beam™ joists When used as part of a flooring are the builder’s choice for residential system, Wood I Beam joists can floor and roof systems. A wide help floors stay quiet over time, selection of sizes and flange choices reducing bothersome and costly make it easy to specify the materials callbacks. Conventional lumber can Available depths and lengths that are right for the homes you build, shrink, twist and warp as the moisture UÊ Ê-iÊÃiÀiÃÊ>ÀiÊ>Û>>LiÊÊ`ii«iÀÊ whether you’re building production found naturally in the wood evaporates. depths by special order. homes or custom plans. Floors can bow, nails pull away from Each joist features an enhanced the joists, and the floor decking slides UÊ ÊÊÃÌÃÊ>ÀiÊ>Û>>LiÊÊÛ>ÕiÊ OSB web with high-grade solid up and down against the nails, lengths of 24Ј, 28Ј, 32Ј, 36Ј, 40Ј, sawn lumber or GP Lam® LVL creating annoying squeaks. 44Ј, and 48Ј. flanges. The wider flanges offered In contrast, Wood I Beam joists UÊ Êi}Ì ÃÊÕ«ÊÌÊÈäЈ may be special by the 40, 60, 65, 80, and 90 series are more stable by design. The wide ordered. joists provide broader gluing and flange helps reduce vibration, creating UÊ viÌiÊÌi`Ê7>ÀÀ>ÌÞ°I nailing surfaces for sheathing, a firmer feeling floor. Wood I Beam helping to save time and money joists are produced at a lower mois- for builders. Occupants enjoy the ture content, thereby minimizing the benefits of firm, level floors and effects of shrinking, twisting, and * See manufacturer’s warranty for terms, conditions and limitations, available at www.gp.com/build or by calling 800-284-5347. smooth, flat ceilings. warping. System performance adjacent to an end wall with no before system sheathing is attached. The ultimate goal in the design of a deflection, causing a noticeable Supports for multiple span joists floor or roof system is the end user’s difference in floor levels under full must be level. To minimize settle- safety and satisfaction. Although design load. ment when using hangers, joists joists used at spans indicated in this UÊ ÊA stiffer floor will result from should be firmly seated in the guide meet or exceed minimum code using a live load deflection limit hanger bottoms. Leave a 1⁄16Љ gap criteria and will safely support the of L/480 versus the code minimum between joist end and header. loads imposed on them, judgement L/360. A roof system with less UÊ ÊVibrations may occur in floor must be used to adequately meet total load deflection than the code systems with very little dead load, user expectation levels. These required L/180 may be achieved as in large empty rooms. A gypsum expectations may vary from one by using an L/240 criterion. wallboard ceiling attached to the user to another. UÊ ÊÊ>``ÌÊÌÊÀiÊÃÌÀ}iÌÊ bottom of the joists will generally UÊ Ê/ iÊëiVwiÀÊà Õ`ÊVÃ`iÀÊÌ iÊ deflection limits, several other dampen vibration as will interior meaning of a given deflection limit factors may improve overall floor partition walls running perpendicular in terms of allowable deflection performance. Reducing joist spacing to the joists. If a ceiling will not and the effects this could have on and/or increasing the subfloor thick- be attached to the bottom of the the system. For example, L/360 ness will lessen deflection between joists, vibration can be minimized (span/360) for a 30Ј span is 1Љ of adjacent joists and increase load by nailing a continu ous 2x4 deflection. L/240 would be 11⁄2,Љ sharing. For increased floor stiffness, perpendicular to the bottom of the and L/180 would be 2Љ of deflection. gluing the subfloor to the joists is joists at midspan running from end Consideration might also be given recommended before nailing or wall to end wall. Where future to cases in which a joist with a long screwing rather than nailing only. finishing of the ceiling is likely, x-bridging or Wood I Beam span parallels a short span or a UÊ ÊÃÊÜÌ Ê>ÞÊVÃÌÀÕVÌ]ÊÌÊÃÊ blocking panels may be used foundation end wall. For example, essential to follow proper installation in place of the 2x4. a 30Ј span with up to 1Љ of allow- procedures. Joists must be plumb able live load deflection could be and anchored securely to supports Georgia-Pacific Wood Products, January 2012 Engineered Lumber Residential Guide 5 Floor Joist Maximum Spans Span Simple Span Multiple Spans Illustrations (see note 4) 40 PSF Live Load + 10 PSF Dead Load Improved Performance (L/480) Joist Joist Spacing (Simple Span) Spacing (Multiple Span) Series Depth 12Љ o.c. 16Љ o.c. 19.2Љ o.c. 24Љ o.c. 12Љ o.c. 16Љ o.c. 19.2Љ o.c. 24Љ o.c. 1 9 ⁄2Љ 17Ј-01Љ 15Ј-07Љ 14Ј-09Љ 13Ј-10Љ 18Ј-07Љ 17Ј-00Љ 16Ј-01Љ 15Ј-00Љ 7 GPI 20 11 ⁄8Љ 20Ј-05Љ 18Ј-08Љ 17Ј-08Љ 16Ј-06Љ 22Ј-03Љ 20Ј-04Љ 19Ј-02Љ 17Ј-05Љ 14Љ 23Ј-03Љ 21Ј-03Љ 20Ј-01Љ 18Ј-09Љ 25Ј-04Љ 23Ј-02Љ 21Ј-04Љ 18Ј-06Љ 1 9 ⁄2Љ 18Ј-00Љ 16Ј-06Љ 15Ј-07Љ 14Ј-07Љ 19Ј-08Љ 17Ј-11Љ 16Ј-11Љ 15Ј-06Љ 7 GPI 40 11 ⁄8Љ 21Ј-06Љ 19Ј-08Љ 18Ј-07Љ 17Ј-04Љ 23Ј-05Љ 21Ј-05Љ 19Ј-09Љ 17Ј-08Љ 14Љ 24Ј-04Љ 22Ј-03Љ 21Ј-01Љ 19Ј-05Љ 26Ј-07Љ 23Ј-09Љ 21Ј-08Љ 19Ј-04Љ 7 11 ⁄8Љ 23Ј-03Љ 21Ј-03Љ 20Ј-00Љ 18Ј-08Љ 25Ј-04Љ 23Ј-01Љ 21Ј-09Љ 20Ј-04Љ GPI 65 14Љ 26Ј-05Љ 24Ј-02Љ 22Ј-09Љ 21Ј-03Љ 28Ј-10Љ 26Ј-03Љ 24Ј-09Љ 20Ј-08Љ 16Љ 29Ј-04Љ 26Ј-09Љ 25Ј-03Љ 23Ј-07Љ 32Ј-00Љ 29Ј-02Љ 25Ј-11Љ 20Ј-08Љ 117⁄8Љ 26Ј-04Љ 24Ј-00Љ 22Ј-07Љ 21Ј-00Љ 28Ј-08Љ 26Ј-01Љ 24Ј-07Љ 22Ј-10Љ GPI 90 14Љ 29Ј-11Љ 27Ј-02Љ 25Ј-07Љ 23Ј-10Љ 32Ј-07Љ 29Ј-07Љ 27Ј-10Љ 25Ј-11Љ 16Љ 33Ј-01Љ 30Ј-01Љ 28Ј-04Љ 26Ј-04Љ 36Ј-01Љ 32Ј-09Љ 30Ј-10Љ 26Ј-07Љ 91⁄2Љ 18Ј-00Љ 16Ј-05Љ 15Ј-06Љ 14Ј-06Љ 19Ј-07Љ 17Ј-11Љ 16Ј-04Љ 14Ј-07Љ WI 40 117⁄8Љ 21Ј-05Љ 19Ј-07Љ 18Ј-06Љ 16Ј-08Љ 23Ј-05Љ 20Ј-05Љ 18Ј-07Љ 16Ј-07Љ 14Љ 24Ј-04Љ 22Ј-03Љ 20Ј-06Љ 18Ј-04Љ 25Ј-11Љ 22Ј-05Љ 20Ј-05Љ 18Ј-03Љ 117⁄8Љ 22Ј-07Љ 20Ј-08Љ 19Ј-06Љ 18Ј-02Љ 24Ј-08Љ 22Ј-06Љ 21Ј-02Љ 19Ј-07Љ WI 60 14Љ 25Ј-09Љ 23Ј-06Љ 22Ј-02Љ 20Ј-08Љ 28Ј-00Љ 25Ј-07Љ 24Ј-01Љ 19Ј-09Љ 16Љ 28Ј-06Љ 26Ј-00Љ 24Ј-07Љ 22Ј-10Љ 31Ј-01Љ 28Ј-04Љ 24Ј-09Љ 19Ј-09Љ 117⁄8Љ 24Ј-11Љ 22Ј-08Љ 21Ј-04Љ 19Ј-10Љ 27Ј-01Љ 24Ј-08Љ 23Ј-03Љ 21Ј-07Љ WI 80 14Љ 28Ј-03Љ 25Ј-09Љ 24Ј-03Љ 22Ј-07Љ 30Ј-10Љ 28Ј-00Љ 26Ј-05Љ 23Ј-11Љ 16Љ 31Ј-04Љ 28Ј-06Љ 26Ј-10Љ 25Ј-00Љ 34Ј-02Љ 31Ј-01Љ 29Ј-03Љ 23Ј-11Љ 40 PSF Live Load + 20 PSF Dead Load Improved Performance (L/480) Joist Joist Spacing (Simple Span) Spacing (Multiple Span) Series Depth 12Љ o.c. 16Љ o.c. 19.2Љ o.c. 24Љ o.c. 12Љ o.c. 16Љ o.c. 19.2Љ o.c. 24Љ o.c. 91⁄2Љ 17’-01Љ 15’-07Љ 14’-09Љ 13’-10Љ 18’-07Љ 17’-00Љ 15’-07Љ 13’-11Љ GPI 20 117⁄8Љ 20’-05Љ 18’-08Љ 17’-08Љ 15’-11Љ 22’-03Љ 19’-05Љ 17’-09Љ 15’-05Љ 14Љ 23’-03Љ 21’-03Љ 19’-06Љ 17’-05Љ 24’-08Љ 21’-04Љ 19’-03Љ 15’-05Љ 91⁄2Љ 18’-00Љ 16’-06Љ 15’-07Љ 14’-02Љ 19’-08Љ 17’-04Љ 15’-10Љ 14’-02Љ GPI 40 117⁄8Љ 21’-06Љ 19’-08Љ 18’-01Љ 16’-02Љ 22’-10Љ 19’-09Љ 18’-00Љ 16’-01Љ 14Љ 24’-04Љ 21’-09Љ 19’-10Љ 17’-09Љ 25’-01Љ 21’-08Љ 19’-09Љ 17’-01Љ 117⁄8Љ 23’-03Љ 21’-03Љ 20’-00Љ 18’-08Љ 25’-04Љ 23’-01Љ 21’-06Љ 17’-02Љ GPI 65 14Љ 26’-05Љ 24’-02Љ 22’-09Љ 21’-03Љ 28’-10Љ 25’-11Љ 21’-06Љ 17’-02Љ 16Љ 29’-04Љ 26’-09Љ 25’-03Љ 22’-03Љ 32’-00Љ 25’-11Љ 21’-06Љ 17’-02Љ 117⁄8Љ 26’-04Љ 24’-00Љ 22’-07Љ 21’-00Љ 28’-08Љ 26’-01Љ 24’-07Љ 22’-02Љ GPI 90 14Љ 29’-11Љ 27’-02Љ 25’-07Љ 23’-02Љ 32’-07Љ 29’-07Љ 27’-09Љ 22’-02Љ 16Љ 33’-01Љ 30’-01Љ 28’-04Љ 23’-02Љ 36’-01Љ 32’-09Љ 27’-09Љ 22’-02Љ 91⁄2Љ 18Ј-00Љ 16Ј-05Љ 14Ј-11Љ 13Ј-04Љ 18Ј-11Љ 16Ј-04Љ 14Ј-11Љ 13Ј-03Љ WI 40 117⁄8Љ 21Ј-05Љ 18Ј-08Љ 17Ј-01Љ 15Ј-03Љ 21Ј-06Љ 18Ј-07Љ 17Ј-00Љ 15Ј-02Љ 14Љ 23Ј-09Љ 20Ј-06Љ 18Ј-09Љ 16Ј-09Љ 23Ј-08Љ 20Ј-05Љ 18Ј-08Љ 16Ј-05Љ 117⁄8Љ 22Ј-07Љ 20Ј-08Љ 19Ј-06Љ 17Ј-11Љ 24Ј-08Љ 21Ј-11Љ 20Ј-00Љ 16Ј-05Љ WI 60 14Љ 25Ј-09Љ 23Ј-06Љ 22Ј-00Љ 19Ј-08Љ 27Ј-10Љ 24Ј-01Љ 20Ј-07Љ 16Ј-05Љ 16Љ 28Ј-06Љ 26Ј-00Љ 23Ј-09Љ 19Ј-10Љ 30Ј-00Љ 24Ј-09Љ 20Ј-07Љ 16Ј-05Љ 117⁄8Љ 24Ј-11Љ 22Ј-08Љ 21Ј-04Љ 19Ј-10Љ 27Ј-01Љ 24Ј-08Љ 22Ј-09Љ 18Ј-02Љ WI 80 14Љ 28Ј-03Љ 25Ј-09Љ 24Ј-03Љ 21Ј-02Љ 30Ј-10Љ 28Ј-00Љ 24Ј-11Љ 19Ј-11Љ 16Љ 31Ј-04Љ 28Ј-06Љ 26Ј-06Љ 21Ј-02Љ 34Ј-02Љ 30Ј-00Љ 24Ј-11Љ 19Ј-11Љ NOTES: 1.
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