1 The World Leader in Cold-Formed Steel TrussesTruss Design ManualV2a division of ITW Building Components division of ITW Building Components GroupTruss Design ManualTRUSS Design & & Components & Code & TrusSteel & / Codes & Design Required for Truss & Resistance & as Building Truss Systems - Truss Systems - Sample Truss Specifications Copyright 2012 ITW Building Components Group, Design manual is intended as a guide to building professionals for suggested uses of TrusSteel trusses. The building code of jurisdiction and a Truss designprofessional should be consulted before incorporating information from this publication into any plan or Building Components Group, Inc., nor any of its divisions or companies, does not warrant the recommendations and information contained herein asproperunder all conditions and expressly disclaims any responsibility for damages arising from the use, application or reliance on the recommendations contained / SHOP Page5 DETAILS / Outlooker and Valley Truss Connections6 Truss FABRICATION / / Conditions & & & / of MaterialsTABLE OF CONTENTS1206 NOTESOVERVIEWThis manual is intended for quick reference only.
2 Drawings and illustrations shown are samples only and are not intended for detailingor construction. Please refer to the TrusSteel Standard Details for technical information on connection Design , product use and strength and stiffness in acold-formed steel is the most accepted, most specified cold-formed steel (CFS) Truss system on the market today. Noother building component combines strength, stiffness, fireresistance, insect resistance and Design flexibility so unique, patented Truss chord shape and Double-ShearTMfasteners, combined with multiple types of webshapes, make TrusSteel CFS trusses, pound-for-pound, thestrongest and stiffest cold-formed steel trusses on themarket. Not surprisingly, these same characteristicscombine to create a light, economical steel buildingcomponent having exceptional load-span capabilities, withclear spans in excess of 80 by powerful Alpine steelVIEWTM Design andanalysis software, TrusSteel CFS trusses provide reliable,economical structural solutions for almost every roof or Most Trusted Name in CFS TrussesAlpine Engineered Products, Inc.
3 Was a drivingforce in the creation of the wood Truss industryover forty years ago. Since that beginning, theindustry has consistently recognized Alpine asengineering and innovation leaders. Now, as apart of the ITW Building Components Group, provides the same leadership in thefounding and development of the pre-engineeredCFS Truss TrusSteel Division has decades of combinedexpertise in the Truss and CFS building productsindustry. The TrusSteel product line combinesover forty years of Truss engineering andsoftwareknowledgewithcutting-edgeroll forming technology and the proven quality ofin-house Truss fabrication. As a result, moreTrusSteel trusses are installed each year thanany other proprietary CFS Truss provides ongoing leadership to thetruss industry through hands-on participation inkey organizations such as the Cold-Formed SteelEngineers Institute (formerly LGSEA), theAmerican Iron and Steel Institute, the CFSC ouncil of the SBCA, the AISI Committee onFraming Standards (COFS), and the Center forCold-Formed Steel is actively involved in programs withthe International Code Council and TrusSteel Truss is designed using theindustry-leading Alpine steelVIEW is the most accurate Truss designsoftware in the industry for a number of reasons,including: True multi-node modeling, not the estimatednode modeling used by other CFS Truss designsoftware packages.
4 Multiple load case analysis applied to eachtruss, including gravity, wind, seismic andunbalanced conditions. Analysis methodologies derived from the mostextensive full-scale testing program in theindustry, utilizing the AISIS pecification for theDesign of Cold-Formed Steel TrusSteel Fabricators, operatingthe steelVIEW software in-house andsupported by TrusSteel engineeringresources, provide solutions for the mostcomplex Truss and Design flexibilityTrusSteel CFS trusses provide the same spancapabilities and Design flexibilities as woodtrusses. The pre-engineered system allows muchgreater Design flexibility than steel C trussframing. As a result, you can Design in familiarroof lines - pitched or flat, with hips, gables,gambrels, monos, mansards, cantilevers,overhangs, scissors and floor trusses. Thisdesign flexibility makes TrusSteel trusses idealfor almost any building type: new construction,retrofit, commercial, institutional, military,educational, industrial and municipal to specify and designThere is a wealth of information available to helpyou specify and Design with TrusSteel.
5 A guidespecification in CSI format, and standard detailsin DXF and DWG formats, can assure that yourspecs and construction documents are accurateand complete. UL, ICC Legacy report (NER) andFlorida Product Approval are available to assistyou in making Design decisions and in workingwith code officials. Local TrusSteel fabricatorscan aid you in making informed decisions aboutproject designs and productsTrusSteel CFS trusses contribute to a safe builtenvironment. They do not emit moisture or fumesduring their life cycle. They are resistant to insectattack, and do not provide a medium for thegrowth of mold. And most of the steel used forCFS framing is recycled fire resistanceNoncombustible TrusSteel trusses provideintegral, recognized fire resistance that does notfade with time. See the following pages for a listof TrusSteel s useful, cost-saving UL-listed roofand floor structural performanceWith over forty years of experience in the trussindustry, you can be assured that TrusSteelunderstands the structural performance oftrusses.
6 The powerful steelVIEWTM Truss designsoftware analyzes each Truss individually usingthe latest industry standards, guided by the newANSI/AISI/COFS -Standard for Cold-Formed SteelFraming - Truss Design . Finally, each Truss designis reviewed and sealed by a TrusSteelProfessional trussesTrusSteel CFS trusses are built in a shopenvironment with experienced fabricationpersonnel. TrusSteel endorses industry trussshop quality control standards as developed bythe Cold-Formed Steel systemSince TrusSteel CFS trusses are the stiffesttrusses in the industry, less permanent bracing istypically required in the Truss , combined with excellent performance at4 ft. on-center spacings or greater, can reducethe cost of the installed Truss system throughreduced labor costs, materials and projectduration. Property insurance premium discountsmay provide long-term availabilityTrusSteel supports the largest network ofindependent CFS Truss fabricators in theindustry.
7 This nationwide network assures thatTrusSteel trusses are available for your projectsin every region of the United FlexibilitySpecifiers & DesignersThe Inn at Biltmore Estate, Asheville, NCProject Phoenix - rebuilding the Pentagon after 9-11 PGA Headquarters, to HandleUnique features of TrusSteel trusses make themsafe to handle and install. Stiffer trusses addhandling control and reduce the danger ofbuckling during lifting and placement. The rollededges of the chords and webs help protectworkers from to InstallTrusSteel trusses can be as light as one-half theweight of similar wood or C stud steel some other CFS trusses, laterally stiffTrusSteel trusses resist folding or butterflying .And TrusSteel trusses work exceptionally well inrafted Special Tools RequiredThe tools you are now using to install CFSframing are all you need to install TrusSteeltrusses. A full line of TrusSteel constructionhardware allows you to make connections withstandard screws.
8 Installation details andconstruction hardware are available from yourAuthorized TrusSteel CallbacksTrusSteel trusses reduce callbacks because theystart straighter and remain straighter than manyother types of trusses. And the dimensionalstability of steel reduces drywall fastener Time, Effort and MoneyTrusSteel trusses streamline the building cycleand save money. Timely quotations from local TrusSteelAuthorized Fabricators providecompetitive prices and define projectcosts up front. Sealed engineering drawings and code-compliant components expeditesubmittals. Quicker turn-arounds for revisions. Delivered to the site ready to install, shop-built trusses save days of labor. Faster Truss installation with accuratelayouts, extensive details, and a full line ofinstallation hardware. Easier site inspections withcomprehensive shop drawings andclearly identified QualityRoof lines plane accurately, eaves and soffitsalign properly, and interior ceiling lines are flatand true.
9 High-quality TrusSteel trusses help youachieve your quality ValueFrom bidding to punch list, TrusSteel deliversvalue to your project through increased safety,quality, efficiency and InstallationTruss RaftingWhat is Rafting? Truss rafting is a framing technique wherecompleted trusses, designed to be rafted, areassembled into an entire roof section on theground and then lifted as an assembly onto thebuilding structure. The assembly can consist ofjust the trusses, or the trusses plus purlins, roofdeck and final roofing which is all installed on theground before the assembly is lifted into a rafting technique can save time,increase safety and reduce insurance costs onmany Raft With TrusSteel?The exceptional strength-to-weight characteristicsand lateral stability of the TrusSteel trusses makethem the ideal Truss for use in a rafting characteristics allow an average-sizedcrane to lift the completed Truss assembly stiffness and stability of theTrusSteel trusses create an assembly that willsurvive a lift without introducing significantadditional & Chord SectionsThe symmetrical shape of TrusSteel s patentedU-shaped chord sections provides nearly equalchord member moment capacity in both in-planedirections.
10 The TrusSteel chord members havesuperior bending strength in out-of-planedirections. These characteristics combine tocreate an efficient Truss that is exceptionallystrong and stiff. The recent addition of specialchord sections for short span / low loadconditions and for long span / high lowconditions improves the value engineering of theentire utilizes both commercial grade closed-tube webs and proprietary roll-formed z-webs todeliver the most cost effective roof system. Bothproducts have unique double symmetric properties which contributes to the strength,stiffness and stability of the Truss as well asreducing lateral members are designed and built in compliance with ASTM A370, ASTM A653, ASTM A500,ANSI Standards, and voluntary standards as described in our own reports from UnderwritersLaboratories (UL) and ICC Legacy reports (NER and Florida Product Approval).