Posijoists can be designed to include single sided posistrut webbing where appropriate to provide considerable material savings. Manufacturer literature and software can confirm spans. Size for a specific spacing, member depth or just the best economical fit. This is a spreadsheet program written in msexcel for the purpose of analysis of steel joists considered as simplespan beams subjected to virtually any type of loading configuration. For more information please visit the james jones website. But with ilevel, youll work with only one serviceoriented supplier to get all of these products and the support you need to build smarter. And is one of the most trusted brands in the building community today. Diaphragm design with steel deck steel joist institute. Timberlinkjames jones jjijoist distributor for midlands. Joist design automatically picks up strongback locations from plan. Ijoists, purlins, joists, building timber, roofing timber.
Looking at this table you will see there is a choice in the size of floor joist 2 x 6, 2 x 8, 2 x 10 or 2 x 12 and there is a choice in the joist spacing 12, 16 or 14. Depending on loads and spans, cjoists are typically spaced at 12, 16, 19. For more information see page 5 for more information see page 11 for more information see page 17. This allows the design and specification of jji joist floors as part of the whole house design process. Jjijoists the answer for many specifiers ha magazine. The result is that the frequency of naturally occurring defects, which can impair. Simply enter the required span to see a range of results that will work. I have worked with krupa woodbeam enhancement on the design of several single and multifamily frame projects since installing it and have found. Posi joists floor timber joists mitek industries joist. To ensure that the weight is distributed in a safe manner we. The jjijoist system engineered wood components design tools and software environmental. The system, incorporating jjijoists, lvl, glulam and bespoke metalwork results in a complete design solution for most types of.
In canada we use limit states design but in the usa they use working stress design. The jji joist flooring system, incorporating the jji joist, is the only fully engineered system designed and manufactured in the uk by a uk owned company. This software analyzes open joist floor trusses in specific loading, spacing and deflection conditions, allowing for value engineering for efficient building. This application provides an easy way to create wood beams, joists, rafters, plates, hips and valleys, along with tags and beam schedule. Table 1 below indicates the jjijoist properties downrated for service class 2 conditions. The jji joists themselves are sold through a network of distributors, all of whom have fully trained staff and can give architects, engineers and builders an. By providing a mobile and web platform for estimating, invoicing, recording, processing payments, and managing projects from anywhere, joist aims to. The jjijoist flooring system, incorporating the jjijoist, is the only fully engineered system designed and manufactured in the uk by a uk owned company. This performance standard provides an easytouse table of allowable spans for applications in residential floor construction, allowing designers and builders to select and use ijoists from various member manufacturers using just one set of span.
Users can set custom deflection criteria as well as custom load duration factors for any live load. Residential structural design vertical structural forces, we were about to start learning about floor joist span tables. Jjijoist properties service class 2 conditions end supports intermediate supports 45mm bearing 89mm bearing 89mm bearing joist series jji moment capacity load. As a fully engineered solution, metal web joists are simple to set out and install and, crucially, allow for services to run virtually unimpeded. Four flange widths are available at 45, 60, 72 and 97mm wide.
This webinar from the steel joist institute and the steel deck institute will expand your knowledge of steel deck diaphragms for roof and floor decks, including the requirements of the ansiaisi s310 north american standard for the design of profiled steel diaphragm panels. Design tools efficiency of design, manufacturing and onsite installation is key to the success of the jjijoist system. Jjijoists the versatile answer for floors, walls and roofs. Nov 25, 2019 the ukwide jji joist distributor network is now fully geared up with the all new jji joist bespoke software package, jji design, meaning that customers are able to have their designs optimised more efficiently and cost effectively than ever before. Size members for a specific spacing, depth or the best economical fit. Jjijoists are available in a comprehensive range of sizes, designed specifically for. Once a jjijoist floor has been fully braced, construction materials may be placed on the floor provided that the overall weight of material to be placed on a single joist does not exceed 250kg 200kg for 195mm deep joists. You can modify an individual rooms floor or ceiling height by selecting the room and clicking the open object edit button to open the room specification dialog. Design flexibility is inherent in the concept of the posi joist. Jji design knowledge base james jones and sons limited.
Its easier for manufacturers to be competitive with fewer metal webs and typically 20% less timber usage than competitive systems. Designing floor systems with engineered wood joists. Specifically, beam end reactions as well as the maximum. The depth, length and width can be adjusted to produce an enormous number of different specifications, each with clearly defined performance criteria. You may wish for one or more rooms on a floor to have different floor or ceiling height values than the floors default. This is a spreadsheet program written in msexcel for the. Design efficiency is key to the success of the jji joist system and we have developed a number of software design tools for this purpose. To support all registered jji design users we have created our own online knowledge base. Jjijoists the versatile answer for floors, walls and. Allegheny structural components makes available software that allows designers to take fullest advantage of open joist capabilities.
Lead innovation and design to create a suite of engineered wood products, including ijoist, lvl microllam, lsl timberstrand, and psl parallam. The system, incorporating jji joists, lvl, glulam and bespoke metalwork results in a complete design solution for most types of building applications. The timing was perfect, with the explosion of mobile software and the launch of the ipad, to build something new. Design flexibility is inherent in the concept of the posijoist. Easily change end support details for timber frame or masonry. Posi joists floor timber joists find a manufacturer.
Metsa wood finnjoists fji are manufactured from high quality oriented strand board osb3 web, and flanges made from our own kerto laminated veneer lumber lvl. The ukwide jjijoist distributor network is now fully geared up with the all new jjijoist bespoke software package, jji design, meaning that customers are able to have their designs optimised more efficiently and cost effectively than ever before. When you have set all framing defaults to your satisfaction, click the ok button to close the dialog and apply your default settings to the structure that you will be drawing before drawing on each floor select edit default settings, select floors and rooms floor levels, the floor level youd like to modify, and then click edit in the floor defaults dialog on the structure panel. Pushed the limits of span charts to make the open floor concepts of today a reality. Mitek posi joist manufacturers benefit from the very latest industry leading design and layout software to create project specific designs. Table 1 below indicates the jji joist properties downrated for service class 2 conditions. The jjijoist designer should advise the building designer of the load to be carried from the jji joists. Our engineered timber ibeam joists deliver strength and rigidity, virtually eradicating floor movement and its associated problems, resulting in greater floor performance. The jjijoist system is fully supported by three windows based software packages written in the uk to provide fast and cost effective design.
Jji joist pitched rafters the following span table is for jji joists in pitched rafter applications, joists designed using the principles of eurocode 5 limit state design code bs en199511. This allows the design and specification of jjijoist floors as part of the whole house design process. Weyerhaeuser software supports the entire building process. Our timber systems division was launched over 20 years ago and has grown to become the uks largest manufacturer of fsc and pefc certified ijoists, branded as jjijoists. For our posijoist manufacturing we work with mitek, a wellrenowned specialist in the development of software solutions for structural timber engineering. Finnjoist ibeam brings strength and stability to flooring.
Repairs are easy using the location analysis tool to find shear and moment results at any location along the member. Metal web joists are beams that combine structural softwood chords with high strength steel webs to form a lightweight, structural beam for use in a range of floor or wall applications. The cullen tfi top fix ijoist hanger offers one standard design that is quick and simple to install. Thanks to greater metal web strength, easijoists use less timber and fewer metal webs than competitors joists, providing significant cost savings. Design tools efficiency of design, manufacturing and onsite installation is key to the success of the jji joist system. Robinson manufacturing is one of the uks largest suppliers of jji joists, with a production facility able to supply 5,000 floors per annum. Oct 10, 2017 robinson manufacturing is one of the uks largest suppliers of jji joists, with a production facility able to supply 5,000 floors per annum. Tji 110, 210, 230, 360, and 560 joist specifiers guide. Weve built in design flexibility for floors, roofs and walls. Whether youre an architect, engineer or design professional sizing joists, beams, posts or studs, forteweb software performs member calculations and identifies solutions for the conditions and geometry you specify.
Jji joists are designed to give a superior strength to weight ratio enabling the manufacture of longer and lighter structural members. Jji design is the new design software platform created by james jones timber systems division to make using, specifying and designing with jjijoists even. Provide a lightweight, lowcost, rigid floor assembly cjoist components provide an economical, lightweight alternative to open web trusses, bar joists, engineered lumber, castinplace or hollow core floor assemblies. Forteweb is the next generation of our member sizing. Span is determined by designers concept and bearing locations. A lot of architects are turning to jjijoists when designing to passivhaus standards because of this. They can be trimmed onsite, and long lengths allow ceilings and floors to be designed with fewer pieces, saving installation time. Ibeam joists delivering strength and stability for your engineered wood flooring. Jji joist properties service class 2 conditions end supports intermediate supports 45mm bearing 89mm bearing 89mm bearing joist series jji moment capacity load. These packages are regularly updated to ensure compliance.
Installation guidelines jjijoists site storage offload. Our software is designed to take advantage of the predictable strength and consistency of our engineered and performance tested lumber. Our highly skilled and experienced sales and technical team complements these tools to allow us to offer some of the finest technical support in the industry. Once a jji joist floor has been fully braced, construction materials may be placed on the floor provided that the overall weight of material to be placed on a single joist does not exceed 250kg 200kg for 195mm deep joists. Span must be considered in context with loading conditions, deflection characteristics, joist spacing and bearing size. Dont worry, you wont need to do a lot of calculations in determining the size and placement of. Tjpro helps you design and build a floor system with trus joist components. You will be given a range of depths and centres that are available and also an indicative deflection result. Design efficiency is key to the success of the jjijoist system and we have developed a number of software design tools for this purpose. Whether youre sizing joists, beams, posts or studs, forte software performs load calculations and identifies solutions for the conditions and geometry you provide. The use of staggered webs can give as much as a 12% reduction in the amount of steel used in a posijoist compared to its competitors once.
Span calculator interactive posi joist span table mitek. The floor joist spacing is the distance between the centers of any two installed joists. Provides a less complex design solution is simple to specify using superior software has part e compliant details available is fscpefc accredited has a bre environmental profile. As an engineered product, available in a wide range of section sizes, jjijoist layouts can be very structurally efficient when each joist is specifically designed for its particular loading and location. The tfi hanger combines a cost effective connector with optimum performance.
Metal web joists howarth timber engineered solutions. Published spans may be used by design professionals within specified loading and spacing parameters. When you build with tji joists, you not only get the best product, you also get unsurpassed customer service, design expertise and engineering support. It derives its high strength from the homogeneous bonded structure and is an excellent flange material. A jji joist is a composite engineered timber joist, combining 45mm deep highgrade finger jointed softwood flanges c24 with a 9mm thick oriented strand board osb 3 web. In addition, end details of the posi joist can be altered to give a variety of support conditions.
Detailed output drawings can be provided for approval and manufacture, but it is the 3d viewer tools that really separate posijoist from the rest. The jji joist designer should advise the building designer of the load to be carried from the jji joists. Jjijoists are designed to give a superior strength to weight ratio enabling the manufacture of longer and lighter structural members. Detailed output drawings can be provided for approval and manufacture, but it is the 3d viewer tools that really separate posi joist from the rest. Mitek posijoist manufacturers benefit from the very latest industry leading design and layout software to create project specific designs. As with all howarth timber engineered solutions products, the supply chain is managed to ensure consistent quality and sustainability credentials.
See the image below for an example of joists spaced 16 on center 16 o. The i joist is a professionally engineered composite timber product manufactured within a quality assured process. The correct selection of suitable, compatible metalwork can also make a big difference to the quality and cost of a jjijoist structure. This together with purpose built production equipment and design software, helps us to deliver an unrivalled level of service to our customers. This software analyzes open joist floor trusses in specific loading, spacing and deflection conditions. In addition, end details of the posijoist can be altered to give a variety of support conditions. Kerto lvl is incredibly strong and dimensionally stable, and it does not distort or shrink.
The use of staggered webs can give as much as a 12% reduction in the amount of steel used in a posijoist compared to its competitors once again delivering you the best possible value. Jjijoists are designed to give a superior strength to weight ratio enabling the. Today jjijoists have a 45% share of the uks ijoist market and are used by every major uk housebuilder. Our engineered timber ibeam joists deliver strength and rigidity. Timberlink staff have been trained in the specialist james jones distributor design software packages, joistmaster and floormaster, which are written to provide fast and cost effective design solutions for todays construction industry. In the hands of experienced pros at your dealer, weyerhaeuser software can help you get the best structural performance from your framing budget. Wood joist, beams in regular dimensional, rough timber, dressed timber, pressure treated, wet conditions, wide flange steel beams, lvl, ijoists, etc. The open web design makes for simpler and faster installation on site, thereby reducing labour costs. Partnering with cofounder michael gauthier was the final step to launch joist. The jjijoists themselves are sold through a network of distributors, all of whom have fully trained staff and can give architects, engineers and builders an.
Jji joist key benefits by robinson manufacturing ltd. Stair loads automatically calculated and applied to joist design. Jjijoist technical manual fifth edition by jamesjones. Apa performance rated ijoists pris are manufactured in accordance with pri400, performance standard for apa ews ijoists, form x720. Design a typical floor joist for the two story office building indicated below. Tb105 elevated garage floors with weyerhaeuser structural composite lumber. Metal web joists can span greater distances than solid or fabricated timber alternatives and, given that they provide an economic alternative to steel or concrete beams, considerable savings can be made in the use of raw materials. Try our interactive span checker to find the posi joist suitable for your project. Auto frame around floor opening joist design automatically picks up strongback locations from plan. Design tools and support james jones and sons limited. Lp solidstart ijoists are more versatile than open web floor trusses, and more uniform and dimensionally stable than lumber. Take advantage of our industryleading software with the tjpro rating system. Ce 331, spring 2002 joist and frame design example 1 2 1.
Installation guidelines jjijoists site storage offload jji. Jji design is the new design software platform created by james jones timber systems division to make using, specifying and designing with jjijoists even faster and easier. This module provides not only the members, but also the mvblock tag, property set definition, and schedule table style. Tb112 moisture effects on weyerhaeuser engineered wood products. The end product is an ibeam which is lightweight yet incredibly strong, resulting in a quick and reliable installation.
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