SmartJoist Design Guide 2011_RGB.pdf - Tilling Timber

Load bearing wallCyclone rodCYCLONE ROD TIE DOWN FORCANTILEVEREDSmartJoist FLOORSWeb stiffenersas per page 16Max distance fromcyclone rod to webstiffener of 100 mm.Floor sheetingSmartJoistblockingpanelCyclone rod,nut and washerunder plateWeb stiffeners required eachside of ALL joists withcyclone tiesCyclone rod, nut andwasher under top plateCS1CYCLONE STRAP CAPACITIESWhere the strap ends of thecyclone strap are wrappedaround the wall plate or othertimber member and are fixedwith 4 of 3.15 Ø x 35 nails,the design capacity ØN j of 15.3 kN is applicable, regardlessof the timber joint group. Tests have proven that bendingthe legs of cyclone straps around the timber increases theultimate load capacity.Prydacyclonestrap orequivalentCantileverSpanEqual to cantileverspan but MIN of600 mm.While double joists shown in the above diagram, it is onlynecessary when loads exceed the capacities of single joistcantilevers.JOIST/BEAM CONNECTIONS SUPPORTING OFFSET LOADBEARING WALLSModern building designs frequently call for the upper storey of a two storey dwelling to be set back from the lower wall toallow sufficient light access to all areas of the building. Provided that the SmartJoists have been designed to support thisoffset load, no special provisions need to be made for their support EXCEPT in the following support conditions:BrickormasonrywallRA1Load bearing wallLoadbearingwallRA2UB, UC orChannelSectionUB, UCor ChannelsectionJoist hanger to match joist size.Joist spanRebate of12 mm MaxJoist spanMin bearinglength 35 mmMaximum Roof Area Supported (m 2 )- based upon worst case of 40 mm flange width (conservative for wider flanged joists)Joist supported on joist hanger RA1Lower flange bearing RA2Joist spacing300 400 450 600 300 400 450 600 300 400 450 600 300 400 450 600(mm)Joist spanSheet Tile SheetTile(mm)3500 21.7 15.0 12.8 8.2 9.6 6.7 5.7 3.6 6.9 6.4 6.2 5.3 3.1 2.9 2.8 2.44000 21.1 14.5 12.3 6.9 9.4 6.4 5.5 3.1 6.7 6.2 6.0 4.6 3.0 2.8 2.7 2.04500 20.5 13.9 11.7 5.7 9.1 6.2 5.2 2.5 6.6 6.0 5.7 3.9 2.9 2.7 2.5 1.75000 20.0 13.4 10.4 4.4 8.9 5.9 4.6 2.0 6.4 5.8 5.1 3.1 2.9 2.6 2.3 1.45500 19.4 12.1 9.1 3.2 8.6 5.4 4.1 1.4 6.3 5.3 4.6 2.4 2.8 2.4 2.0 1.1SmartJoist Design Guide 19