Pro includes facilities for specifying steel joists and joist girders. K series joists shall be designed in accordance with this specification to support the uniformly distributed loads given in the standard load tables for open web steel joists, k series, attached hereto. First edition composite steel joist catalog shown in figure 1 sji, 2007. Steel joists, steel deck fabrication canam buildings.
The use of lh series joists are used for longer span conditions where heavier loads are required. The use of a system of steel joists and steel deck is a solution of choice resulting in significant savings. Introduction of open web steel joist, deck and composite. The term longspan steel joists lh series and deep longspansteeljoistsdlh series,asusedherein,refers toopenweb,loadcarryingmembersutilizinghotrolledor. In order to be classified as an apa pri, the joist is limited to a l480 live load maximum deflection where l span for gluenailed residential floor applications, a criteria which provides superior floor performance. The standard specification for k series, lh series, dlh series open web steel joists and for joist girders, hereafter referred to as the specification, covers the design, manufacture, application, and erection stability and handling of joist. Elite product line comparison 5 elite steel framing system spec tables elite framing specifications 6. In so doing, it utilizes the economy and strength of open web steel joists and joist girders and the low insulation costs, high diaphragm capacities and unique erection method of the panelized wood roof. Steel joist institute sji standard specifications, load tables and weight. If you wish to order a hardcopy, next to each catalog you wish to receive, please. Placing a dab of subfloor adhesive in the seat of the hanger prior to installing the joist can reduce squeaks. Over a decade ago, i had bethlehem old joist catalog values, and needed a macomber catalog thread50717733. In structural engineering, the open web steel joist owsj is a lightweight steel truss consisting, in the standard form, of parallel chords and a triangulated web system, proportioned to span between bearing points the main function of an owsj is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to the structural frame i. Standard steel joists and joist girders are crucial components of structural steel.
Joist loadsplf weight allowable joist joist loadsplf weight allowable joist joist loadsplf weight allowable joist joist loadsplf weight. These same features also make them a popular choice for roof joists. Approximate span table for kseries open web joists. Applying a protective membrane, such as gypsum ceiling.
For kseries, lhseries, and dlhseries open steel store. Standard specifications for open web steel joists, kseries and load tables sjik1. Loads for span increments not explicitly given in the load table may be determined using linear interpolation between the load values given in adjacent span columns. Extend a minimum distance of 212 inches on steel supports, and a minimum of 4 inches on masonry and concrete supports. Typical and atypical applications in new buildings since they were first published, each sji standard specification has included load.
The basis for this implementation is the information contained in the 1994 publication of the american steel joist institute called standard specifications, load tables, and weight tables for steel joists and joist girders, fortieth edition. Recommended code of standard practice for steel joists and joist girders, latest edition. Structural steel, joists, and metal decking contents 3 3. Joists are custommade structural steel components used to support the floors or roof of a building. Review of where standard joists, constant shear joists kcs joists, special joists for supporting nonuniform and concentrated loads, or cj series composite joists may be advantageous. Tji joists are also available in deeper depths that are suitable for heavierduty loads, such as those in multifamily structures and light commercial buildings.
Canam buildings specializes in the manufacture of steel joists in a variety of shapes, sizes and geometries. Joists joists shall be bethlehem open web steel joists s series or l series, as approved by the steel joist institute or other institute approved joists. In all cases the dead load, including the joist selfweight, must be deducted from the total load to determine the live load. These joists easily handle spans that other systems cannot handle while their lightweight construction makes them less costly than crustal steel beams. K series joists range in depth from 10 to 30 and can. The use of a system of steel joists and steel deck is. For the proper handling of concentrated andor varying loads, see section 2.
Tables for k and lhdlh series steel joists and joist girders, latest edition. Standard specifications and load tables for short span steel joists, k series. Tji joists revolutionized the way you build floors trus joist developed wooden ijoists nearly 40 years ago, and since then weve continually improved their quality and made them easier to work with. Standard specifications for longspan steel joists, lh series and deep longspan steel joists, dlh series 4. Two standard types of k series joists are designed and manufactured. Also, the development of a single specification for both the ljand the lh series joists, with the use of 36,000 psi mini. An inhouse joist test lab conducts research and development projects. Standard specifications for open web steel joists, k series 3. Standard specifications and load tables, open web steel.
Smi steel products is part of the cmc steel group of commercial metals company nyse. The analysis of open web steel joists in existing buildings. Download our design and specification guides pdf, updated with current. Series joist that exceeds 72 inches 1829 mm in depth and has a span greater than 80 feet 24384 mm, be used in a bottom bearing configuration. Standard specifications and load tables, open web steel joists, j series, h series, longspan steel joists, lj series, lh series, deep longspan steel joists, dlj series, dlh series responsibility steel joist institute. Specifications and a standard load table, covering spans through 96 feet and depths through 48 inches, were jointly approved with the american institute of steel construction. A successful and economical steel joist project relies on such. These joists easily handle spans that wood systems cannot handle while their lightweight construction makes them much less costly than steel beams. Tradeready steel joist clarkdietrich tradeready steel joists clear spans up to 33 feet, and are one of the primary components of the tradeready floor system.
Series, shall be designed in accordance with this specification to support uniform loads when the span is less than 10 feet 3048 mm where an open web configuration becomes impractical. K series, sections 16 kcs joists lh series and dlh series, sections 100105 joist girders, sections 1006 sji code of standard practice 4 for joists and joist girders sections 18 referenced specifications, codes and standards glossary fire resistance ratings with steel joists 149 osha safety standards for steel erection 158. Now, i cant find any catalogs for bethlehem joists. Steel joist institute sji standard specifications, load tables and weight tables for k and lhdlh series steel joists and joist girders, latest edition. The first open web steel joists in the united states were manufactured. The use of k series joists in the framing of floors and roofs offers huge advantages when compared to wood truss and steel beam systems. These joists feature large extruded holes that accommodate hvac, mechanical, plumbing and sprinkler runs.
Large extruded holes accommodate hvac, mechanical, plumbing, electrical and sprinkler runs. When using hangers with tabs, bend the flange tabs over and nail to the tji joist bottom flange. Cj series composite joists all joists consist of the following basic elements. The society for protective coatings sspc, steel structures painting manual, volume 2, systems and specifications, paint. Engineered to provide strength and consistency, ilevel trus joist tji joists are a key part of our silent floor system.
Weyerhaeusers framer series lumber is mechanically graded to virtually eliminate warping, and each board comes with the crown clearly marked to speed up installation. To provide an example of how to interpret an older load table, a partial copy of sjis allowable joist load table circa. Full text of bethlehem openweb steel joists s series. Work in this section includes, but is not limited to.
Valley joist is a manufacturer of steel joists k series, lh, dlh and joist girders and steel deck roof deck, composite deck and form deck. The details and information contained in this booklet relate directly to open web steel joists and joist girders in a panelized roof system. Macomber steel joist steel and stainless engineering. Much like today joist manufacturers can build steel joists from any shapes they want as long as the joist s meet sji specs. Vulcraft steel joists and joist girders catalog gsp industries. The standard specification for composite steel joists, cj series, code of standard practice for composite steel joists, responsibilities of the design professional, design guide lrfd weight tables and. The approximate joist weights, in pounds per linear foot, given in the load table may be added to the other building weights to determine the dead load. The elite steel framing system was designed to save you transportation, labor, and material costs, providing a more intelligent framing system than ever before. Openweb steel joists, or bar joists or short span joists or long span joists k series, kcs series, lh series, dlh series, slh series joists, girders, and bridging are available in prime painted gray finish, uncoated, or galvanized. The existing joists are essentially hat channels for top and bottom chords. K series 8 through 30 in 2 increment with 64 designations. Valley joist also fabricates a wide range of nonstandard joists and joist girders including bow strings, rainbow joists, single pitch, double pitched, scissor joists and gable joists. Steel joists standard steel joists and joist girders.
Steel joist products include k, lh and dlh series joists, designed and manufactured in accordance with the specifications of the steel joist institute. Tji 110, 210, 230, 360, and 560 joist specifiers guide. Table 1 allowable spans for apa ews performancerated i joists simple span onlya,b,c,d depth joist series simple spans. However, formatting rules can vary widely between applications and fields of interest or study.
Lh series joists have been standardized in depths from 18 inches 457 mm through 48 inches 1219 mm, for spans through 96 feet 29,260 mm. Steel joists, dlhseries and load tables sjilhdlh2010. Pdf open web steel joists owsj have been extensively used in the building industry. Additionally, indiana and ohio facilities are certified in accordance with the requirements of the current ibcmichigan. Pdf investigation into the behavior of an open web steel joist. Steel construction or joist girder open web steel joists steel joists are prefabricated lightweight trusses that are available in different series. In the manufacturing of steel joists and joist girders, vulcraft uses high quality steel.
Joist certifications steel joist institute member company fully certified manufacture to k, lh, dlh series, and joist girder series. Steel used for lh and dlhseries joist chord or web sections shall have a minimum yield strength determined in accor dance with one of the procedures. Provide lateral restraint at the end of each joist by fastening to a rim, band joist, header, or other member or by using fullheight blocking between floor joist ends. Steel structures painting council sspc 2000, steel structures painting manual, volume 2. Selecting and specifying american institute of steel. Loadandresistancefactor designlrfdandallowablestrengthdesignasdare includedinthisspecification. The kcs joist is a k series joist developed to allow the building designer to easily specify a standard joist to support not only uniform loads but also concentrated loads or other nonuniform loads. Each catalog can be viewed online, downloaded or ordered where you will receive a hard copy in a few days. These types are underslung top chord bearing or squareended bottom chord bearing, with parallel chords. Add tags for load tables with properties and dimensions. Standard specification for composite steel joists, cj series, design guide weight tables and bridging tables and code of standard practice for composite steel joists. You can have confidence in the strength of steel for all of. The following are the salient features of the implementation. Vulcraft provides a number of resources to help you efficiently and successfully specify steel joists and deck.
I joists, trusses, and lightgauge steel succumb quickly to fire if not protected. Bethlehem old joist catalog structural engineering general. Standard specifications and load tables, open web steel joists, j series, h series, longspan steel joists, lj series, lh series, deep longspan steel joists, dlj series, dlh series. With lumber like this, framing goes up fast, crews wont spend valuable time culling, and theres less material waste when the job is done. The term open web steel joists series, as used herein, refers to open web, loadcarrying members utilizing hotk rolled or coldformed steel, including coldformed steel whose yield strength has been attained by cold working, suitable for the direct support of floors and roof slabs or deck. The steel shall be made in open hearth or electric furnace and shall conform to the american society for testing materials standard specifications for steel for buildings and bridges. The joist also features a series of smaller holes for electrical and technology lines. This and other concerns led to the development of what came to be called open web steel joists. Other landmark adoptions by the institute include the following.
The kcs joist is a k series joist which is provided to address the problem faced by specifying professionals when. The lh and dlh series have been designed for the purpose of extending the use of joists to spans and loads in excess of those covered by open web steel joists, k series. Series joists by the steel joist institute and the american institute of steel construction. K series adopted by the steel joist institute november 4, 1985 lhdlh series adopted by the steel joist institute may 10, 2006 joist girders adopted by the steel joist institute november 4, 1985 revised to november 10, 2014, effective january 1, 2015. Lh series joists range in depth from 18 to 48 and can span up to 960. Pdf link sji joist load tables 43rd edition openweb steel joists, or bar joists or short span joists or long span joists k series, kcs series, lh series, dlh series, slh series joists, girders, and bridging are available in prime painted gray finish, uncoated, or galvanized. Prefabricated oncenter bli 40, bli 60, bli 80, bli 90, bli 400, bli 700, and bli 900 ceiling, floor, and roof joists with enhanced osb webs and lumber flanges. Steel used for joist girder chord or web sections shall have a minimum yield strength determined in accordance with one of the procedures specified in section 1002. This publication contains the following main sections. Bethlehem old joist catalog structural engineering. Bli joist architectural specifications part 1general 1. Kcs joist chords are designed for constant moment capacity at.
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