JJI-Joists Technical Manual (3rd Edition) - ESI
TECHNICAL MANUALTHIRD EDITIONJJI-Joists“SPECIFY JJI-JOISTS TODAY, FOR THECONSTRUCTION OF TOMORROW.”
CONTENTS01INTRODUCTION02THE SYSTEM03GENERAL INFORMATION04ENVIRONMENTAL INFORMATION05JJI-JOISTS08SERVICE HOLES IN JJI-JOISTS09FIRE AND DURABILITY10ACOUSTIC PERFORMANCE11JJ-GLULAM14JJ-GLULAM FIXING DETAILS17METALWORK18FLOOR DESIGN19DOMESTIC INTERMEDIATE AND APARTMENT FLOOR SPAN TABLE20HEALTH AND SAFETY – TEMPORARY BRACING21SITE STORAGE AND RESTRICTIONS22GENERAL FLOOR DETAILING27FLOOR DETAILING – TIMBER FRAME CONSTRUCTION29FLOOR DETAILING – MASONRY CONSTRUCTION31ROOF DESIGN32JJI-JOIST FLAT ROOFS33JJI-JOIST PITCHED RAFTERS35ROOF DETAILING38WALL DETAILING AND CONSTRUCTION39INDICATIVE WALL DETAILING AND CONSTRUCTION40GLOSSARYWhilst every effort was made to ensure the accuracy ofthis publication at the time of printing James Jones & SonsLtd cannot be held responsible for changes to BuildingRegulations, NHBC Standards etc.
INTRODUCTIONINTRODUCTION TOJAMES JONES & SONS LIMITEDJames Jones & Sons Ltd is the UK’s leading manufacturerof I-Joists based at its Timber Systems Division in Forres,Morayshire. The Timber Systems Division prides itself onbuilding strong partnerships throughout the supply chain,concentrating on its core values of quality and service.THE COMPANYJames Jones & Sons is one of the largest suppliers ofBritish Timber in the UK today. The company’s sawmillsare strategically placed to take advantage of the increasingsupply of saw logs being produced from post war plantations.These are bought from both private and state owned forestsas well as woodlands owned and managed by the company.JJI-Joists are manufactured under the strictest qualityand environmental standards, and this new edition of theTechnical Manual outlines the applications and versatilityof JJI-Joists. The range is manufactured to UK sizes andspecifications, and is available on a Just-In-Time basisfrom a comprehensive stock holding. The entire productionand distribution process has been audited by third partyaccreditation systems, and a Life Cycle Assessment hasbeen carried out to ensure full sustainability andenvironmental compliance.FAMILY CONCERNThrough the use of the bespoke, dedicated softwareprogrammes, JJI-Joists can be specified and engineeredto exacting standards, for applications including floors androofs of both domestic and commercial buildings.CUTTING EDGEJJI-Joists are part of a comprehensive building system andare complimented by Glulam and metal connectors and thismanual highlights their use and combinations.JJI-Joists are sold through dedicated Distributors, merchants,timber frame kit manufacturers and roof truss manufacturerssituated strategically across the UK and Ireland. These combinedresources, backed up by dedicated James Jones & Sonspersonnel, ensure that the design, specification and supplyof JJI-Joists is seamless and of the highest quality.ROOTSMr James Jones started trading in timber and alliedproducts in the middle of the nineteenth century. Sincebeing incorporated in 1905, James Jones & Sons hasgrown both organically and by acquisition.“Specify JJI-Joists today,for the constructionof tomorrow.”James Jones & Sons is a real family business. Even with astaff of over 500 it has the culture of a family firm. Like anygood family, the company cares for it’s members. Thatconcern extends to whole communities in rural areas wherethe company is a major employer. There is also an equalconcern for customer satisfaction. The company’s missionis to maintain the highest standards of quality and servicein the industry.The company strives to maintain its competitive advantages.Variety of product is one. Wood is harvested and processedfor specific markets and end uses such as: Construction,Palletwood, Packaging and Fencing.James Jones & Sons has a team of highly trainedprofessionals who look after the purchasing and harvestingof round timber, making sure that the right logs go to theright mill where they can be processed to best advantage.Good relationships with forest owners are vital and in mostcases are of many years standing thus providing the rightbackground for the purchase of our raw material.Quality comes from modern sawmills staffed by experiencedpeople. James Jones & Sons is fortunate in having manypeople who are experts in their field and who know aboutand understand wood. This ensures the quality of ourproducts is maintained at the highest level.THE FUTUREAs well as investing in state of the art technology for ourtraditional sawmilling business, James Jones & Sons Ltdhave taken the strategic decision to invest in and developmore innovative products. The JJI-Joist, manufactured byJames Jones & Sons Ltd, Timber Systems Division, is thedirect result of one of the new technologies that has beenembraced by the company. Following the successful launchof the JJI-Joist range in 1999 the Timber Systems Divisionhave added a fully automated second production line alongwith a highly efficient finger jointing line to keep up withdemand. In addition to the production investment, theDivision has also set up a technical and design office toprovide a full design and engineering support service.01
02THE SYSTEMTHE JJI-JOIST SYSTEMSOFTWAREThe JJI-Joist system relies on a unique combinationof engineered products designed to compliment eachother and deliver outstanding performance.The JJI-Joist system is fully supported by threeWindows based software packages written in theUK to provide fast and cost effective design solutionsfor today’s construction industry.JJI-JOISTSThe work horse of the system, a versatile light weightstructural member ideal for floor joists, rafters, purlinsand wall studs.These packages are regularly updated to ensurecompliance with ever changing Building Regulationsand Codes of Practice, each new version incorporatingnew features and developments to help the designermake the most of the system.For more information see page 5JJ-GLULAMFor the most demanding applications, high strengthand stiffness combined with dimensional stability makethis the ideal choice for heavily loaded members infloors, roofs and walls.JoistMaster is an extremely powerful beam designtool, which enables the specifier to quickly assess themost cost effective joist solution, tailored to his/herparticular design requirements, and provide acalculation printout suitable for Local Authorityapproval. JoistMaster is freely available to downloadfrom www.jji-joists.co.ukFloorMaster is a comprehensive floor design andlayout package allowing trained designers to quicklyand accurately produce detailed layout drawings,installation details, material call-offs, calculationsand design quotations for any building footprint.For more information see page 11OptiMaster is a stock optimisation packagedesigned to work with the output from FloorMaster.METALWORKThe key to making the system work is being able toconnect everything together. A comprehensive rangeof connectors designed specifically for the JJI-Joistsystem are available from two approved suppliers.For more information see page 17Consultec Timber Frame software, one of the UK’sleading whole house packages, now contains aJJI-Joist floor design module. This allows the designand specification of JJI-Joist floors as part of the wholehouse design process.
GENERAL INFORMATIONDISTRIBUTIONBBA certification and BMTRADA Q-Mark are recognised byNHBC, Zurich, Local Authority Building Control and others.The JJI-Joist System is available from a network of builders/timber merchants and timber frame and engineered timbersystem manufacturers providing local, quality expertise.These Distributors are trained to use our software andunderstand the correct use and specification of our products.This training is ongoing and ensures our Distributors havethe skills required to provide an efficient, cost-effective,JJI-Joist solution.Distributor details are available to download fromwww.jji-joists.co.ukCUSTOMER SERVICES AND TECHNICAL SUPPORTJames Jones & Sons, Timber Systems Division has a highlytrained team of Technical, Engineering and Sales personnelproviding UK and Irish national coverage to ensure simple,safe and quick installation of JJI-Joist Systems. A summaryof the services offered is given below. James Jones & Sons Ltd are founder members of theUK Timber Frame Association (UKTFA) Engineered WoodProducts Committee and were involved in the drafting ofthe Code of Practice for the Design of Engineered WoodProducts which provides guidance on the design ofstructures using I-joists. Design output from James Jonessoftware is produced in full compliance with this Code ofPractice providing further assurance that the design is tothe highest standard.Pre and After Sales AssistanceEngineering SupportProduct Training CoursesSoftware and Design TrainingBuilding Site TrainingFull Design and Engineering ServiceAPPROVALSQUALITY CONTROL AND QUALITY ASSURANCEJJI-Joists are an accepted building material within theconstruction industry thanks to third party certificationfrom both the British Board of Agrément and BMTRADA Certification.The success of a manufactured product is often determinedby its quality. It is for this reason the James Jones & SonsLtd, Timber Systems Division maintains a thoroughQuality Assurance program which enables us to achieveour goal of producing a consistent and uniform product ofexceptionally high standards. JJI-Joists are manufacturedunder a Quality Assurance scheme which complies withISO 9001:2000 and CE marking.RESEARCH AND DEVELOPMENTThe Timber Systems Division has an ongoing research anddevelopment program designed to find new applications forexisting products and to improve the performance in currentapplications. In addition to this, production methods andtechnology are continuously reviewed and improved tomaximise quality and efficiency.03
04ENVIRONMENTAL INFORMATIONENVIRONMENTAL MANAGEMENTBRE ENVIRONMENTAL PROFILEOur ISO 14001:2004 accreditation guarantees compliancewith all current and forthcoming environmental legislation.Systematic environmental improvements are targeted, costeffective and innovative. Employee competence has enabledreductions in manufacturing wastes and energy usethroughout the site. Sustainable heating systems combinewith evolving process technologies to deliver a JJI-Joistwith the smallest environmental footprint possible.The Life Cycle Profiling of JJI-Joists is the finalcomplimentary part of the JJI-Joist environment strategy.Our shipping, transport and manufacturing processes aresuch that our joists are “A” rated in all typical applicationsutilising the Ecohomes system.Our international environmental accreditation also acts as aframework for guaranteeing sustainable timber supply andimplementing Life Cycle Assessments to deliver JJI-Joistswith a unique, sector leading Ecohomes rating.JJI-Joists alone have completed this process, enablingspecifiers, architects, and housing associations independentverification of the “excellent” environmental rating of all JJIJoists supplied. This ongoing detailed appraisal process, hasenabled the quantification of environmental improvementsin areas such as shipping patterns, new formulation resins,and fossil fuel to biomass energy substitution.Such a process further strengthens our ISO 14001:2004 andChain of Custody procedures which combine to deliver truesustainability in practice. Profile Certification details areavailable from our website together with EnvironmentalManagement and Chain of Custody certificates andbackground information.CHAIN OF CUSTODYIncreasingly, UK Government and both public and privatesector specifiers requires proof of sustainable timber supply.JJI-Joists again out-perform the sector on this key issue viaour Chain of Custody accreditation.Sustainable timber supply has always been integral to themanufacture of our engineered JJI-Joists. Uniquely JJI-Joistsare able to be specified as FSC Certified or PEFC Certified.Through our BM Trada Forest Products Certification,independent Certification details can be supplied throughthe supply chain to both specifiers and to individualconstruction sites as required.
JJI-JOISTSINTRODUCTIONJJI-JOIST RANGE AND TOLERANCESA JJI-Joist is a composite engineered timber joist, combining45mm deep high-grade finger jointed softwood flanges (C24)with a 9mm thick oriented strand board (OSB 3) web. Fourflange widths are available at 45, 60, 72 and 97mm wide.JJI-Joists are available in a comprehensive range of sizes,designed specifically for the UK market, and in lengths ofup to 12m.COMPOSITIONSoftwood flangesHigh tensile and compressivestrength is used to carry thebending loads which aregreatest at the top andbottom of the section9mm OSB3 WebHigh shear strength is used tocarry the shear loads whichare greatest at the mid depthof the sectionJoist mmTimberGrade C24C24C24C24C24C24C24C24C24Table 1. JJI-Joist Product RangeTolerance(mm)Member DimensionOverall Joist LengthOverall Joist DepthFlange Thickness/DepthWeb Thickness /-3.0 /-2.0 /-2.0 /-0.8Table 2. JJI-Joist Manufacturing ToleranceJJI-JOIST IDENTIFICATION AND MARKINGThese materials have different specific properties and bycombining the two materials in this way to form a compositesection you can use the strengths of each one where it isneeded most. This results in the new section outperformingthe individual materials that it is made from (the sum isgreater than its parts) making it more structurally efficient.Using advanced technology these components are combinedto produce an innovative alternative to conventionalconstruction timber with many additional advantages.ADVANTAGESJJI-Joists are designed to give a superior strength to weightratio enabling the manufacture of longer and lighter structuralmembers. The JJI-Joist, with a softwood flange: Is capable of spanning longer distancesIs easier to handleIs easier to fix and nailIs less prone to splitting and delaminationIs quicker to installIs extremely stableReduces building maintenanceProvides a less complex design solutionIs simple to specify using superior softwareHas Part E compliant details availableIs FSC/PEFC accreditedHas a BRE Environmental ProfileJJI-Joists are identified by an alpha numeric code thatspecifies the joist depth, flange size and flange grade (seeexample below). This code is printed at regular intervals alongthe centreline of the web along with the production time anddate to facilitate on-site identification and traceability.IDJJI195 B ch Code‘B’ Flange60mm WideC24TimberFlangeIn addition to the above information, the clear warning“DO NOT CUT FLANGES” is printed along the lengthof each flange as a precaution against creating unnecessarystructural damage.05
06JJI-JOISTSJJI-JOIST PROPERTIESdifferent way. Permissible stress design properties, intendedfor use with BS5268 Part 2 can be found in BBA CertificateNo.99/3633. Characteristic capacities, intended for use withEurocode 5, can be found in European Technical Approval05/0224.It is possible to design JJI-Joist structures using either aPermissible Stress Design Code (BS5268 Part 2) or a LimitState Design Code (EN1995-1-1/Eurocode 5). Each coderequires properties that are derived and presented in aJoistWeightJoist TypeJJI 145AJJI 195AJJI 195BJJI 195CJJI 195DJJI 220AJJI 220BJJI 220CJJI 220DJJI 235AJJI 235BJJI 235CJJI 235DJJI 245AJJI 245BJJI 245CJJI 245DJJI 300AJJI 300BJJI 300CJJI 300DJJI 350CJJI 350DJJI 400CJJI 400DJJI d ntermediate Bearing89mm89mmTable 3. Long Term Permissible Design Properties for JJI-Joists (BS5268:2)Notes for Table 3:1.Do not mix values from Table 3 and Table 4.2.3.Values given are for long term load durations only (k3 1.0).Values are applicable to joists in Service Class 1 only.4.Figures in bold indicate that web stiffeners are required to attain the stated value. In BBA Certificate No.99/3633 thesevalues are limited to the shear capacity of the joist. The values given here allow for the possibility of point loads from above.5.All strength properties are given for joists used in a load sharing situation. Non-load sharing values can be obtained as follows:Moment Capacity – Divide the tabulated value by 1.07.Shear and Bearing Capacity – Divide the tabulated value by 1.04.6.The bearing capacities are based on the bearing lengths shown.7.Minimum end bearing length 45mm (A longer bearing may be required were the joists are used to restrain external masonry walls).8.Minimum intermediate bearing length 89mm.9.The long term uniformly distributed bottom flange pull-off load is 5.5kN/m.10. End bearing capacities for bearing lengths between 45-89mm can be found by linear interpolation.
JJI-JOISTSWeightMeanJoist TypeJJI 145AJJI 195AJJI 195BJJI 195CJJI 195DJJI 220AJJI 220BJJI 220CJJI 220DJJI 235AJJI 235BJJI 235CJJI 235DJJI 245AJJI 245BJJI 245CJJI 245DJJI 300AJJI 300BJJI 300CJJI 300DJJI 350CJJI 350DJJI 400CJJI 400DJJI 0.4122.18End BearingIntermediate Bearing45mmShearValue89mmTable 4. Characteristic Capacities for JJI-Joists (Eurocode 5)Notes for Table 4:1.Do not mix values from Table 3 and Table 4.2.Figures in bold indicate values that are obtained using web stiffeners.3.The bearing capacities are based on the bearing lengths shown.4.Minimum end bearing length 45mm. (A longer bearing may be required where the joist is used to restrain).5.Minimum intermediate bearing length 89mm.6.Advice on choosing appropriate partial factors for limit state design can be found in ETA-05/0224.PERMISSIBLE JJI-JOIST VERTICAL LOAD CAPACITIESJJI Joist Depth195220235245300350400450Maximum long term load per metre run (kN/m)Maximum single point load (kN)25.020.020.019.017.015.013.012.0Table 5. Permissible JJI-Joist Vertical LoadsNotes for Table 5:1.Loads are given for long term load duration. Modification factor k3 has the followin
JJI-Joists are manufactured under the strictest quality and environmental standards, and this new edition of the Technical Manual outlines the applications and versatility of JJI-Joists. The range is manufactured to UK sizes and specifications, and is available on a Just-In-Time basis from a comprehensive stock holding. The entire production
JJI-Joists are manufactured under the strictest quality and environmental standards, and this new edition of the Technical Manual outlines the applications and versatility of JJI-Joists. The range is manufactured to UK sizes and specifications, and is available on a Just-In-Time basis from a comprehensive stock holding.
JJI-Joists A JJI-Joist is a composite engineered timber joist combining 45mm deep high-grade finger jointed softwood flanges with a 9mm thick oriented strand board web. Four flange widths are available at 47, 63, 72 and 97mm wide. Using advance technology these components
JJI-Joists are manufactured under the strictest quality and environmental standards, and this new edition of the Technical Manual outlines the applications and versatility of JJI-Joists. The range is manufactured to UK sizes and specifications, and is available on a Just-In-Time basis from a comprehensive stock holding. The
Use for all Framing Elements (except Openings) - if ON then selected joists and rim joists families will be used for other framing elements, like connections, bridgings, noggings etc. without an option to change it to the custom family. Main Type of Joists (or Rim Joists) - select a family and type for the Joists or Rim Joists. Sample families
to the AF&PA Span Tables for Joists and Rafters, or the AF&PA Maximum Span Calculator for Joists & Rafters. 5502.3.1 Sleeping Areas and Attic Joists. 780 CMR Table 5502.3.1(1) shall be utilized to determine the maximum allowable span of floor joists that support sleeping areas
FOR FLOOR AND TJI 110 ROOF FRAMING TJI 210 TJI 230 TJI 360 TJI 560 Joists WARNING: DO NOT walk on joists until braced. INJURY MAY RESULT. WARNING: DO NOT stack building materials on unsheathed joists. Stack only over beams or walls. WARNING: DO NOT walk on joists that are lying fl
and s47 joists. These joists offer a wide nailing surface for fast installation and easy handling, and they provide the same guaranteed performance you've come to expect from Trus Joist products. TJI s31, s33 and s47 joists are a resource-efficient building product and mee
the American Board of Radiology (ABR) Core and Certifying examinations administered between January 1 – December 31, 2018. The guide has undergone a few minor changes compared to the 2018 version, which was significantly revised com- pared to earlier versions, reflecting changes in NIS content on the examinations. The primary change in this study guide is the addition of Core Concepts of .
