JJI-Joists - National Hickman
JJI-JoistsTechnical Manualfourth EDITIONSpecify JJI-Joists today, for the construction of tomorrowwww.jji-joists.co.uk
contents01Introduction02the ORMATION05jji-joistS08SERVICE HOLES IN jji-joists09fire and durability10ACOUSTIC PERFORMANCE11bj-beam (Glulam)14bj-beam fixing details17metalwork18floor design19domestic intermediate and apartment floor span tables20health and safety – temporary bracing21site storage and restrictions22INDICATIVE floor detailing – F details31roof design32jji-joist flat roofS33jji-joist pitched rafterS35INDICATIVE roof detailing – R details38wall design39JJI-JOIST THERMAL PERFORMANCE40INDICATIVE wall detailing – W details41GLOSSARYWe currently offer a face to face seminar on Engineered WoodProducts for Modern Methods of Construction. These areoffered for larger Construction Practises throughout the UKand Ireland.Please visit our website to request a face to face seminar andfind out how to take our online CPD Seminar.Whilst every effort was made to ensure the accuracy of this publication at the time of printingJames Jones & Sons cannot be held responsible for changes to Building Regulations, NHBCStandards etc.For the most up-to-date information please visit our web site: www.jji-joists.co.uk
introductionIntroduction to James Jones & SonsThe CompanyJames Jones & Sons is the UK’s leading manufacturer of I-Joistsbased at its Timber Systems Division in Forres, Morayshire.The Timber Systems Division prides itself on building strongpartnerships throughout the supply chain, concentrating on itscore values of quality and service.James Jones & Sons is one of the largest suppliers of BritishTimber in the UK today. The company’s sawmills are strategicallyplaced to take advantage of the increasing supply of saw logsbeing produced from post war plantations. These are boughtfrom both private and state owned forests as well as woodlandsowned and managed by the company.JJI-Joists are manufactured under the strictest quality andenvironmental standards, and this new edition of the TechnicalManual 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 comprehensivestock holding. The entire production and distribution processhas been audited by third party accreditation systems, anda Life Cycle Assessment has been carried out to ensure fullsustainability and environmental compliance.Through the use of our bespoke, dedicated softwareprogrammes, JJI-Joists can be specified and engineered toexacting standards, for applications including floors and roofsof both domestic and commercial buildings.JJI-Joists are part of a comprehensive building system and arecomplimented by glulam and metal connectors and this manualhighlights their use and combinations.Family ConcernJames Jones & Sons is a real family business. Even with a staff ofover 500 it has the culture of a family firm. Like any good family,the company cares for its members. That concern extends towhole communities in rural areas where the company is amajor employer. There is also an equal concern for customersatisfaction. The company’s mission is to maintain the higheststandards of quality and service in the industry.Cutting EdgeThe 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.JJI-Joists are sold through dedicated Distributors, merchants,timber frame kit manufacturers and roof truss manufacturerssituated strategically across the UK and Ireland. Thesecombined resources, backed up by dedicated James Jones& Sons personnel, ensure that the design, specification andsupply of JJI-Joists is seamless and of the highest quality.James Jones & Sons has a team of highly trained professionalswho look after the purchasing and harvesting of round timber,making sure that the right logs go to the right mill where theycan be processed to best advantage. Good relationships withforest owners are vital and in most cases are of many yearsstanding thus providing the right background for the purchaseof our raw material.RootsQuality comes from modern sawmills staffed by experiencedpeople. James Jones & Sons is fortunate in having manypeople who are experts in their field and who know about andunderstand wood. This ensures the quality of our products ismaintained at the highest level.Mr James Jones started trading in timber and allied products inthe middle of the nineteenth century. Since being incorporatedin 1905, James Jones & Sons has grown both organically andby acquisition.The Future Joint venture in lumberbusiness: Canada/USA Investments inTelecoms business: Italy JJI-Joists Sawmilling Harvesting Pallet Manufacture Pallet repairUnited Box Partner in woodproduct manufacturingAs well as investing in state of the art technology for ourtraditional sawmilling business, James Jones & Sons hastaken the strategic decision to invest in and develop moreinnovative products. The JJI-Joist, manufactured by JamesJones & Sons, Timber Systems Division, is the direct resultof one of the new technologies that has been embraced bythe company. Following the successful launch of the JJI-Joistrange in 1999 the Timber Systems Division have added a fullyautomated second production line along with a highly efficientfinger jointing line to keep up with demand. In addition to theproduction investment, the Division has also set up a technicaland design office to provide a full design and engineeringsupport service.1
2the systemThe JJI-Joist SystemSoftwareThe JJI-Joist system relies on a unique combination ofengineered products designed to compliment each other anddeliver outstanding performance.The JJI-Joist system is fully supported by three Windows based software packages written in the UK to provide fastand cost effective design solutions for today’s constructionindustry.JJI-JoistsThese packages are regularly updated to ensure compliancewith ever changing Building Regulations and Codes of Practice,each new version incorporating new features and developmentsto help the designer maximise the benefits of the system.The work horse of the system, a versatile light weight structuralmember ideal for floor joists, rafters, purlins and wall studs.JoistMaster is an extremely powerful beam design tool, whichenables the specifier to quickly assess the most cost effectivejoist solution, tailored to his/her particular design requirements,and provide a calculation printout suitable for Local Authorityapproval. JoistMaster is freely available to download fromwww.jji-joists.co.ukFor more information see page 5BJ-Beam (glulam)For the most demanding applications, high strength andstiffness combined with dimensional stability make this theideal choice for heavily loaded members in floors, roofs andwalls.FloorMaster is a comprehensive floor design and layoutpackage allowing trained designers to quickly and accuratelyproduce detailed layout drawings, installation details, materialcall-offs, calculations and design quotations for any buildingfootprint.For more information see page 11MetalworkThe key to making the system work is being able to connecteverything together. A comprehensive range of connectorsdesigned specifically for the JJI-Joist system are available fromtwo approved suppliers.For more information see page 17OptiMaster is a stock optimisation package designed to workwith the output from FloorMaster.
general informationDistributionApprovalsThe JJI-Joist system is available from a network of builders/timber merchants and timber frame and engineered timbersystem manufacturers providing local, quality expertise.JJI-Joists are an accepted building material within theconstruction industry thanks to third party certification from boththe British Board of Agrément and BM TRADA Certification.CERTIFICATE NUMBER EWP-0001BM TRADAENGINEERED WOOD PRODCUTSBBA certification and BMTRADA Q-Mark are recognised byNHBC, Zurich, Local Authority Building Control and others.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.ukJJI-JOISTS UK STOCKISTS & TECHNICAL SUPPORTJames Jones & Sons are founder members of the UK TimberFrame Association (UKTFA) Engineered Wood ProductsCommittee and were involved in the drafting of the Code ofPractice for the Design of Engineered Wood Products whichprovides guidance on the design of structures using I-joists.Greshop Industrial Estate,Forres, Moray, IV36 1JJGeneral Support01309 671111Regional SupportJames Smith07500 016773Lynford Chambers07879 888216Peter Barker07977 283781Mark Tilston07977 283756www.jji-joists.co.ukQuality Control AND Quality AssuranceThe success of a manufactured product is often determined byits quality. It is for this reason the James Jones & Sons, TimberSystems Division maintains a thorough Quality Assuranceprogram which enables us to achieve our goal of producing aconsistent and uniform product of exceptionally high standards.JJI-Joists are manufactured under a Quality Assurance schemewhich complies with ISO 9001:2008 and CE marking.JJI–Joist DistributorTimber Frame Kit SupplierCustomer 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, safeand quick installation of JJI-Joist systems. A summary of theservices offered is given below. Pre and After Sales Assistance Engineering Support Product Training Courses Software and Design Training Building Site Training Full Design and Engineering ServiceResearch AND DevelopmentThe Timber Systems Division has an ongoing research anddevelopment program designed to find new applicationsfor existing products and to improve the performance incurrent applications. In addition to this, production methodsand technology are continuously reviewed and improved tomaximise quality and efficiency.3
4ENVIRONMENTAL informationEnvironmental Managementlife cycleEnvironmental considerations are a very important factor inthe production of JJI-Joists. Our certified ISO 14001:2004Environmental Management System has enabled the companyto target key areas to reduce the impacts of our activities onthe environment.True sustainability can only be measured and improved uponby assessing all environmental impacts associated with thesourcing, transport and manufacture of that product (ie. fromthe forest to the end user).The introduction of sustainable heating systems and thecontinuous commitment to waste minimisation, energysavings and recycling of materials used ensures the delivery ofJJI-Joists with the smallest environmental footprint possible.The constant consideration of the environment in our currentand future plans has shaped our purchasing policy to chooseonly those technologies that can prevent pollution and improveour environmental performance.The high competence of our employees enables ourenvironmental objectives to be implemented and exceededevery year. The support given by management ensures that acontinual improvement culture in environmental performanceis always present at the very centre of all our activities. Asenvironmental considerations affect the whole JJI-Joist supplychain, we are engaged in continuous dialogue with our suppliersand distributors to minimise this impact. One result from theseefforts has been the mutual decision to supply only timber fromsustainable sources.Therefore, our commitment to ISO 14001:2004 not onlyguarantees you compliance with all current and forthcominglegislation but delivers a JJI-Joist with excellent environmentalcredentials and minimal impacts throughout its life cycle.Chain of CustodyJJI-Joists can help to mitigate climate change as timber actsas a carbon sink. Carbon dioxide (CO²) is absorbed by treesand used to create wood. This CO² is only released back intothe environment when the joists come to the end of theirlifetime. As only sustainable timber is used for the productionof JJI-Joists, other trees are planted to replace harvested onesimmediately, closing the CO² cycle and contributing to keepa constant or even increasing volume of CO² locked awayfrom the atmosphere where it cannot contribute to climatechange.The continuous planning and research to minimise transport,purchase new formulation resins and use biomass as a way tosubstitute fossil fuels ensures that impacts throughout the lifecycle of JJI-Joists are minimal.These low impacts have been recognised by the current schemecreated to quantify environmental impacts of products such asBRE environmental profiles. Scores for this scheme are used inthe assessment process of 'The Code for Sustainable Homes' inEngland and Wales and 'Ecohomes' in Scotland. Timber I-joistssuch as JJI-Joists achieve the best scores in this scheme (A )and therefore can help specifiers to achieve the Zero CarbonHouse level.ElectricitysupplyNaturalgas supplyDieselsupplyWatersupplyFlangesOSBThe UK Government policy on timber purchasing has stated thattimber should only be purchased from legal and sustainablesources. Increasingly, both public and private sectors areencouraged to follow this policy.Sustainable timber supply has always been integral to themanufacture of our engineered wood products. JJI-Joists meetsthis requirement as they can be specified as FSC Certified or PEFCCertified. These claims are independently verified through BMTRADA Forest Product certification scheme.The Central Point of Expertise on Timber Procurement (CPET),the UK Government advisory committee for timber purchasing,has established the different options available for companiesto prove that timber is legal and sustainable. In this way,compliance with an existing certification scheme approvedby CPET is considered to be sufficient. Both FSC and PEFCschemes have been approved as a way to deliver legal andsustainable timber.TT-COC 1503 & 1064BMT-PEFC-0105Co-productsEmissionsto landGluePackagingEmissionsto airEmissionsto waterThermal performanceOther advantages of using JJI-Joists are their superior strengthto weight ratio and readily available deep sections (up to 450mm)when compared with solid timber. In this way more insulation canbe used within the building envelope and significant savings inheating can be achieved.The thin web used in JJI-Joists contributes to minimise repeatedthermal bridging in timber frame structures enabling JJI-Joiststo achieve better U-values than solid timber. This propertymakes JJI-Joists ideal as a structural member in roofs and wallsin low energy buildings.The UK government has already expressed their preferencefor better insulated and airtight building envelopes as a wayto reduce energy consumption. The adoption of insulatedstructures using JJI-Joists and designed according to principlessuch as Passivhaus can significantly reduce the energyrequirements for heating and this approach will be essentialto achieve a truly Zero Carbon House.
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 47, 63, 72 and 97mm wide.JJI-Joists are available in a comprehensive range of sizes,designed specifically for the UK market. JJI-Joists are availablein lengths of up to 12m.COMPOSITIONJJI-JOist flange sizesA B CD45mmSoftwood flanges9mm OSB/3 WebHigh tensile and compressivestrength is used to carry thebending loads which aregreatest at the top andbottom of the sectionHigh shear strength is usedto carry the shear loads whichare greatest at the mid depthof the section45mm47mmThese 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 is greaterthan its parts) making it more structurally efficient.Using advanced technology these components are combined toproduce an innovative alternative to conventional constructiontimber 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 distances Is easier to handle Is easier to fix and nail Is less prone to splitting and delamination Is quicker to install Is extremely stable Reduces building maintenance Provides a less complex design solution Is simple to specify using superior software Has Part E compliant details available Is FSC/PEFC accredited Has very low embodied energy63mm72mm97mmJJI-Joist Flange SizesJoist Depth(mm)A 47mm14531953B le 1. JJI-Joist Product RangeMember DimensionTolerance (mm)Overall Joist Length /-3.0Overall Joist Depth /-2.0Flange Thickness/Depth /-2.0Web Thickness /-0.8Table 2. JJI-Joist Manufacturing ToleranceJJI-Joist Identification and MarkingJJI-Joists are identified by an alpha numeric code that specifiesthe joist depth, flange size and flange grade (see examplebelow). This code is printed at regular intervals along thecentreline of the web along with the production time and dateto facilitate on-site identification and traceability.IDJJI 195 B p‘B ’ Flange63mm WideProductionBatch CodeIn addition to the above information, the clear warning 'DO NOTCUT FLANGES' is printed along the length of each flange as aprecaution against creating unnecessary structural damage.5
6jji-joistsJJI-Joist PropertiesIt is possible to design JJI-Joist structures using either aPermissible Stress Design Code (BS 5268-2) or a Limit StateDesign Code (EN1995-1-1/Eurocode 5). Each code requiresproperties that are derived and presented in a different way.Joist TypeJJI 145 A JJI 195 A JJI 195 B JJI 195 CJJI 195 DJJI 220 A JJI 220 B JJI 220 CJJI 220 DJJI 235 A JJI 235 B JJI 235 CJJI 235 DJJI 245 A JJI 245 B JJI 245 CJJI 245 DJJI 300 A JJI 300 B JJI 300 CJJI 300 DJJI 350 CJJI 350 DJJI 400 CJJI 400 DJJI 450 SW(mm)(kNm)(109 5.204.485.494.775.786.072202352453003
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 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 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
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
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
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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
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