Rosboro Glualm Technical Guide - JustAnswer

1 Growing Today Building Tomorrow RosboroGlulamTechnicalGuidenX-BeamnBigBe amnTreated GlulamRosboro has long been committed to sustainable manufacturing processes and responsibly managedforestlands. Now it looks like we re ahead of the March 2011 the Department of Agriculture(USDA) introduced a strategy to promote the use ofwood as a green building material. Wood has a vitalrole to play in meeting the growing demand for greenbuilding materials, said Agricultural Secretary TomVilsack. Concurrently, Forest Service Chief Tom Tidwell issueda directive calling for increased use of locally milledtimber in all new agency buildings and facilities. Ourcountry has the resources, the work force and the innovative spirit to reintroduce wood products into allaspects of the next generation of buildings, Tidwellsaid. As we move forward with restoring America sforests, we are getting smarter and more efficient in howwe use wood products as both an energy and greenbuilding source, which will help maintain rural jobs.

2 A recent Forest Service lifecycle analysis found thatharvesting, transporting, manufacturing and using wood(lumber and panel products) yields fewer greenhousegas emissions than other commonly-used building materials. In response, Rosboro will continue to dowhat we do best: offer the building community a rangeof high quality wood products and maintaining ourfocus on a sustainable It s the right product for the ,THENATURALCHOICE FORTODAY ANDTOMORROW 3 THEPOWER OFGLULAMAs the largest glulam manufacturer in North America, Rosboro offers a full line of glulam products to meetthe needs of residential and commercial s glulam products, such as X-Beam,BigBeam, and Treated glulam , are stocked through-out the country to provide next-day shipment. Thesepopular brands are sold to distributors in long lengths,which are cut to length when ordered, and shippedwith the balance of the framing package.

3 In 2009, Rosboro added custom glulam to the productline. Capabilities include beams in depths up to 53",widths up to 141/4", and lengths to 100', as well asspecified camber, curved glulam , and beam fabrica-tion. Species include Douglas fir, yellow cedar, andPort Orford cedar, and all beams can be specifiedwith preservative treatment that fits a specific com-mercial, industrial, or residential with FSC certification, Rosboro CustomGlulam is offered in many different appearances,including framing, industrial, architectural, premium,and rough-sawn. Rosboro can also manufacture awide array of curved shapes up to 100 feet Inspection Title 24 nFSCnJAS (Japan)nCSA (Canada)2509 Main St., Springfield, OR Box 20, Springfield, OR 97477 glulam Sales:1-888-393-2304 Technical Support Hotline:1-877-457-4139 Fax:1-541-726-0972 OFCONTENTSA natomy of a Glulam5 Camber8 Moisture Effects9 Treated Glulam10 Guidelines for Drilling Holes11 Rosboro Facts12 glulam Storage and Handling13 Design Values and Properties Tables15 Load Tables: X-Beam 18 Column Tables: X-Beam 24 Load Tables: BigBeam 25 Load Tables: Treated Glulam31 Column Tables.

4 Treated Glulam33 Technical Support34 Rosboro glulam Products - Descriptions and Available Appearance ClassificationsHigh Strength, I-Joist Depth glulam ,Balanced Layup,Framing AppearanceWide Range ofAppearances andTextures IncludingPremium Hand SelectAppearance24F V4 Layup, FullFraming-Width, I-Joist andConventional Depths,Architectural AppearanceRosboro 24F Treated, I-Joist Depth glulam ,Balanced Layup,Framing AppearanceAnatomy of GlulamRosboro X-Beam X-Beam is the building industry s first full framing-width stock glulam inarchitectural appearance. As a preferred option for saving time and money,X-Beam frames flush and eliminates the need to fill 3/8" gaps on the jobsite,which helps builders lower installed costs, win bids, and execute their projects on time and on beams and columns available in 31/2", 51/2", 63/4", and 83/4" widths, and I-Joist compatible and conventional depths, X-Beam has gained a reputationas the most adaptable and cost-effective EWP in the market.

5 Major hardwaremanufacturers like Simpson Strong-Tie and USP support X-Beam productswith full lines of compatible hardware. Backed by Rosboro s signature cus-tomer support, X-Beam is the ideal glulam for today s building BigBeam Rosboro BigBeam is our highest-strength I-Joist compatible glulam modern residential to commercial applications, BigBeam has becomethe high-performance glulam of choice for architects, engineers, and builderslooking for a beam with maximum strength, stability and a balanced layup and zero camber, BigBeam ensures a flat, consistentsurface when used in conjunction with engineered floor systems. This hybridglulam (LVL and dimension lumber) matches standard I-Joist depths andwall-framing widths, making BigBeam one of the market s favorite multi-purpose, high-strength glulam Treated GlulamHere s the glulam that can brave the elements.

6 Rosboro Treated GlulamBeamsare made from southern yellow pine and then treated with a clearpreservative to resist rot, decay, and insect attack, making this product theideal choice for above-ground and severe-weather applications. Excellent fordecks, porches, and balconies, Rosboro Treated glulam has a balanced lay-up and is available in standard framing widths of 31/2" and 57/16" and I-Joistcompatible depths ranging from 91/2" through 18". Rosboro TreatedGlulam Columnsare available in 33/8", 51/4", and 7"widths and 31/2", 51/2",and 7" depths. Rosboro Treated glulam Columns are pressure treated with a mineral spirit-borne copper naphthenate preservative that provides an idealfungicide and insecticide for the long-term preservation of glulam columnsin both ground contact and above-ground uses. Rosboro Custom GlulamWe are able to offer our industry-leading glulam in custom sizes that give ourcustomers greater flexibility and the convenience of combining customorders with other building materials.

7 Manufactured from Douglas fir, Alaska cedar, and Port Orford cedar, Rosboro s Custom glulam is available in a wide range of appearances,I-Joist compatible and conventional depths, and curved shapes. Products can be manufactured up to 100' long, 53" deep, and 141/4" BigBeam Custom GlulamTreated Glulam5000' RadiusZero CamberZero Camber 5As an engineered wood product, glulam is manufacturedto meet specific design stresses. This is accomplished byplacing the strongest lams on the top and bottom of thebeam, where maximum tension and compression stressesoccur. This process ensures that we use lumber resourcesefficiently while producing glulam beams with maximumstructural quality. Individual lams typically are 13/8" thick for southern pineand 11/2" thick for Douglas fir and other western species,though other thicknesses may also be used. Offering glu-lam products ranging in net widths from 31/8" to 141/4", Rosboro is the first manufacturer to offer full framing-width stock glulam in architectural appearance (X-Beam ).

8 Balanced and Unbalanced BeamsRosboro glulam is manufactured in balanced or unbalanced unbalanced beams, the strength of lumber used on thebeam s tension side is higher than the lumber used on thecorresponding compression side. As a result, unbalancedbeams have different bending stresses assigned to the compression and tension zones and must be installedaccordingly. To help ensure proper installation of unbal-anced beams, Rosboro clearly stamps the top of the beamwith the word TOP .Balanced members are symmetrical in lumber quality fromthe horizontal center line to the top and bottom. Balancedbeams are often used in applications such as cantilevers or continuous spans, where either the top or bottom of themember may be stressed in tension due to service can also be used in single-span applications, thoughan unbalanced beam is more efficient for this , unbalanced beams work in multi and Design PropertiesAllowable design properties are a key factor in specifyingglulam.

9 Bending members are typically specified on thebasis of the maximum allowable bending stress of themember. For example, a 24F designation indicates a mem-ber with an allowable bending stress of 2,400 , a 30F designation refers to a member with anallowable bending stress of 3,000 psi. These different stresslevels are achieved by varying the percentages and grade ofhigher quality lumber in the beam layup. Use of different species may also result in different stressdesignations. To identify whether the lumber used in thebeam is visually or mechanically graded, the stress combination also includes a second set of example, on an unbalanced 24F layup using visuallygraded Douglas fir lumber, the layup designation is identified as a 24F-V4. The V indicates that the layupuses visually graded lumber ( E is used for mechanical-ly graded lumber). The number 4 further identifies aspecific combination of lumber used to which a full set ofdesign stresses, such as horizontal shear and MOE, areassigned.

10 The family of standard Rosboro glulam beamproducts and their corresponding allowable stresses areshown below. Rosboro Beam Design Stress ComparisonAnatomy of GlulamFb= 1,850 psiE = x 106 psi*Fv= 265 psiFb= 2,400 psiFb= 3,000 psiE = x 106psi*Fv= 300 psiFb= 3,000 psiFb= 2,400 psiE = x 106psi*Fv= 300 psiFb= 2,400 psiX-BeamBigBeamTreated glulam * True EEquivalent Eapparentand Etrue(a)(1) Indicates structural use: B-Simple span bend-ing member, C-Compression member, T-Tensionmember, CB-Continuous or cantilevered spanbending member.(2) Mill number.(3) Identification of ANSI Standard ,Structural Glued Laminated Timber. is the American National Standardfor glulam beams.(4) Applicable laminating specification.(5) A code that indicates the wood species. In thisexample, DF = Douglas fir. (6) Structural grade designation. The APA EWS24F-V4 designation is a glulam grade commonlyused in residential applications.