Joists Joist and Joist Girders Catalogue

1 Joist CatalogueJoists andJoist GirdersA division of Canam GroupCanam is a trademark of Canam Group Inc. TABLE OF CONTENTSP roducts, services and solutions .. 4 General informationThe advantages of using steel Joists .. 5 Description of a Joist girder ..5 Definition ..5 Components of a Joist girder ..5 Advantages of Joist Girders .. 6 Steel .. 7 Design standards .. 7 Quality assurance .. 7 AccessoriesMaterial / Metric .. 8 Axes convention .. 8 Section properties .. 8 Material / Imperial .. 10 Axes convention .. 10 Section properties .. 10 Bridging ..13 Specifications ..13 Bridging line requirements / Metric ..14 Bridging line requirements / Imperial ..15 Spacing for bridging / Metric .. 16 Spacing for bridging / Imperial .. 17 Knee braces .. 18 Material weights .. 19 Standard detailsExtensions .. 21 Maximum duct openings / Metric .. 23 Maximum duct openings / Imperial.

2 24 Geometry and shapes .. 26 Standard shape .. 27 Non-standard shapes .. 27 Special shapes .. 27 Minimum depth and span .. 28 Shoes .. 28 Particularities .. 29 Bearing on concrete or masonry wall .. 29 Bearing on steel .. 29 Details .. 30 Ceiling extension .. 30 Flush shoe .. 30 Bolted splice .. 30 Bottom chord bearing .. 31 Cantilever Joist .. 31 Joist and Joist girder identification .. 32 Standard connections .. 32 Surface preparation and paintPaint standards .. 33 Paint costs .. 33 Colours .. 34 Joists exposed to the elements or corrosive conditions .. 34 VibrationSteel Joist floor vibration comparison .. 35 Special conditionsSpecial Joist deflection .. 39 Deflection of cantilevered Joists .. 39 Camber ..39 Special loads and moments .. 40 Various types of loads .. 40 Transfer of axial loads .. 40 Unbalanced loads .. 42 Load reduction according to tributary area.

3 42 End moments .. 43 Gravitational moments .. 43 Wind moments .. 44 Joist or Joist girder analysis and design .. 44 Joists adjacent to more rigid surfaces .. 46 Joists with lateral slope .. 46 Anchors on Joists .. 47 Special Joists .. 48 Joist girder to column connections .. 49 Bearing reaction .. 49 Bearing on top of the column .. 49 Bearing facing the column .. 50 Bearing facing the column with center reaction .. 50 StandardsCAN/CSA S16-01 standards (16 . Open-web steel Joists ) and CISC commentaries .. 51 Joist depth selection tables Metric .. 71 Imperial .. 80 Joist girder depth selection .. 89 Graphics / Metric .. 93 Graphics / Imperial .. 95 Joist girder specificationsInformation required from the building designer .. 97 Checklist - joistJoist design essential information checklist .. 98 Take-off sheet - quotation .. 99 Sales offices and plant certifications.

4 103 Canam specializes in the fabrication of steel Joists , Joist Girders , steel deck, purlins and girts, and welded wide- flange shapes. We also design and fabricate the Murox high performance building system and Econox foldaway portable buildings. Canam offers customers value-added engineering and drafting support, architectural flexibility and customized solutions and services. Another Canam solution, the BuildMaster approach, has redefined the way in which buildings are designed and built by offering a safer, faster and greener process that can reduce field erection time by between 15% and 25%. Factors such as product quality, worksite supervision and construction time are critical in the execution of any project, big or small, and Canam's reputation for reliability simplifies these considerations for customers. In addition to a rigorous jobsite management process that is specifically designed to ensure that deadlines are met, our cutting-edge equipment, skilled employees and high quality products are also key in allowing Canam to keep its promises.

5 Whatever your project, we will meet your requirements while also complying with all applicable building codes. Another aspect of our exceptional service is just-in-time delivery as per customer specifications. To eliminate delays, components are transported by our very own fleet, which stands ready to ensure on-time delivery, regardless of the location. Depending on the region and worksite, Canam can transport components measuring up to 16 ft. ( m) wide and 120 ft. ( m) long. Canam is one of the largest steel Joist fabricators in North America. CAUTIONARY STATEMENTA lthough every effort was made to ensure that the information contained in this catalog is factual and that the numerical values presented herein are consistent with applicable standards, Canam does not assume any responsibility whatsoever for errors or oversights that may result from the use or interpretation of this data.

6 Anyone making use of this catalog assumes all liability arising from such use. All comments and suggestions for improvements to this publication are greatly appreciated and will receive full consideration in future , services and solutionsTHE ADVANTAGES OF USING STEEL JOISTSU sing a steel Joist and steel deck system for floor and roof construction has proven itself to be a most advantageous solution. It can result in substantial savings based on: Efficiences of high-strength steel; Speed and ease of erection; Low self-weight of roof and floor construction allowing for smaller columns and foundations than for a concrete structure; Increased bay dimensions, which reduces the number of Joists and columns and simplifies building erection; Greater floor plan layout flexibility for the building occupant due to the increased bay dimensions; Maximum ceiling height due to installation of ducts through the Joist web system; Easy adaptation to acoustical insulation systems; Floor and roof composition having long-term resistance to fire, as established by the Underwriters Laboratories of Canada (ULC).

7 DESCRIPTION OF A Joist GIRDERDEFINITIONA Joist girder is a primary structural component of a building. Generally, it supports floor or roof Joists in simple span conditions, or other secondary elements (purlins, wood trusses, etc.) evenly spaced along the length of the Joist girder. The loads applied to a spandrel Joist girder come from one side, while on an inside bay the loads are applied on either side of the Joist OF A Joist GIRDERAn open web Joist girder, or commonly known as a cantruss at Canam, is composed of a top chord and a bottom chord, which are usually parallel to each other. These chords are held in place using vertical and diagonal web members. In conventional construction, a Joist girder rests on a column and the bottom chord is held in place horizontally by a stabilizing standard main components are:1. Top and bottom chords: two angles back-to-back with a gap varying between 25 mm (1 in.)

8 And 76 mm (3 in.),2. Diagonals: U-shaped channels or two angles back-to-back,3. Verticals: U-shaped channels, boxed angles or HSS,4. Shoes: two angles chordBottom chordDiagonalVerticalShoeComponents of a Joist girderAppuis sph riques5 General informationADVANTAGES OF Joist GIRDERSThe use of open web Joist Girders is widespread in North America, mostly in the United States, for roof construction of commercial and industrial buildings. The Joist Girders are advantageous compared with conventional load bearing systems composed of beams with a W profile. Here are the various options for supporting systems when designing a steel building:Economical factors associated with the specification of Joist Girders include the following:1. The steel used in Joist Girders has a yield strength higher than steel used for shaped or welded beams: 380 MPa (55 ksi) versus 350 MPa (50 ksi).

9 2. Better cost control for material purchases (angles) on the Canadian market compared with importing the beam Open web Joist Girders are lighter than the full web beams of the same The speed and ease of site erection improves jobsite The Joist Girders can be used to facilitate the installation of ventilation ducts and plumbing as compared to a systemSimple beamGerber systemJoist girderBeamJoist girderMechanical conduitsPassage of mechanical conduitsAppuis sph riques 6 General informationIf a larger opening is required, a diagonal member can be removed if the top and bottom chord are building designer must consider the following to ensure the economical use of Joist Girders :1. Longer spans of Joist Girders are preferred as this reduces the number of columns inside a Greater depths reduce the size of the top and bottom chords for increased weight Bay arrangement should be repetitive since designing and fabricating many identical pieces will reduce production Regular Joist spacing must be maintained by the building designer by lining up the Joists on either side of the Joist Rectangular bays are recommended, in a roof or floor system using Joist Girders and Joists , where the longest dimension corresponds to the Joist span, while the shortest dimension corresponds to the Joist girder span.

10 An optimal rectangular bay would typically have a ratio of Joist span to Joist girder span of approximately Bearing shoes are used for economical Joist girder to column connection, usually 191 mm ( in.) deep, bolted to the top of the column or on a bearing bracket on the web or the flange of the Joist and Joist girder design makes use of high strength steel purchased in accordance with the latest issue of the standards below: Cold formed angles and U-shaped channels: ASTM A1011; Hot rolled angles and round bars: STANDARDSJ oist and Joist girder design is based on the latest issue of the design standards in effect:Canada: United States: CAN/CSA S16 01 SJI CAN/CSA S136 07 NBCC 2005 QUALITY ASSURANCEOver the years, we have established strict quality standards. All our welders, inspectors, and quality assurance technicians are certified by the Canadian Welding Bureau (CWB).