Special Engineering Note: Open Joist trusses may be manufactured with components that provide increased structural values that may exceed the performance levels indicated in these charts.NOTE: Clear spans shown on this chart are presented under the following conditions: (1) Bearing size varies and is determined by loading conditions, truss span and truss spacing (2) "Strongback" bracing is not considered (3) Assumes composite action with a single layer of 3/4" wood sheathing glued and nailed or screwed (4) Spans are clear distance between supports for uniformly loaded trusses and include allowable increases for repetitive use members.To find maximum clear span for a given truss depth in a given loading condition, refer to the bottom line of spans shown for that particular truss depth. Maximum spans published on the chart above may be limited by standard joist configuration. * Because OPEN JOIST is a "stock" product, the length of an OPEN JOIST truss determines the size and grade of the truss' chords (see table below).Click on a span to generate a full calculation (you can adjust the exact span). This title is bundled exclusively with a Premium Complete subscription. Digital Codes Premium Subscription Offerings. Add to Favorites Categories AWC Standards Standards Currently Viewing First Version: Jan 2020 Start Free 14-day Premium Complete Trial. Find the column for your dead load and spacing, and the row for your timber size to find the permissible clear span in metres. 2021 Span Tables for Joists and Rafters (STJR) favoriteborder. View details on fire resistance assemblies for one and two hour endurance. Permissible Clear Spans for Flat Roof Joists (to BS 5268-7.2) Imposed load.Full H2 treatment is also available.9-1/4" Depth Maximum Live Load Deflection (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ1-1/4" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ1-7/8" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ4" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ6" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)ġ8" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)Ģ0" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End) All material is H2S treated for termite protection south of the Tropic of Capricorn. The webs are made from stable, strong Oriented Strand Board (OSB) for superior strength and consistent performance. We start with ultrasonically graded LVL, bonded with exterior adhesive for more load carrying capacity. SmartJoists are engineered for heavy performance. A clear, easy to read colour A3 layout is provided along with an installation guide, and the SmartJoist is supplied labelled and with pre-cut penetrations cut in the web of the SmartJoists where requested. This approach provides accuracy, efficiency and peace of mind for any builder. Design Serviceįor the ultimate in convenience, the SmartFrame Design Centre can design floor systems from engineering and architectural drawings. Tilling Timber runs CNC machinery to provide pre-cut service penetrations in SmartJoist, free of charge. Larger service holes can easily be accommodated. Convenience of service penetrationsĪll SmartJoist products include a 40mm knock-out hole at 450mm centres along the web, for small diameter services or wiring. All SmartJoist sizes are available across Australia through a network of knowledgeable timber merchants. Tilling also exclusively offers a 255mm Wet Area Set-Down joist to complement the 300mm joists for a complete floor system solution. SmartJoist offers the most comprehensive range in the market, with 200mm, 240mm, 300mm, 360mm and 400mm heights available. Cost effective, convenient and high performing, the Tilling range of SmartJoist spans further than any other I-Joist available on the market.
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