Issue link: http://alpine.uberflip.com/i/493471
1 2 3 4 5 6 7 8 3.22 Sample Tables Each TrusSteel truss is engineered individually to meet the load, span, spacing and geometry requirements of a specific project. There are literally millions of possible combinations. These tables show a small sample of those combinations, based on the most common design criteria and simple common trusses. Contact your local TrusSteel Authorized Fabricator to obtain truss designs for your specific project needs. General Notes: 1) Spans shown in charts are in feet. 2) Loads shown above are outlined as Top Chord Live Load (TCLL), Top Chord Dead Load (TCDL) and Bottom Chord Dead Load (BCDL). 3) Top chords are assumed to be restrained laterally by structural sheathing. 4) Bottom chords are assumed to be restrained laterally at intervals not to exceed 24 inches. 5) Deflection limits: Live Load - L/360, Total Load - L/240 6) Trusses designed in accordance with ASCE7-10 wind and these considerations: • Wind speed shown in charts • Exposure C • Building category II • Truss bearing elevation is 8'0" • No topographic effect from escarpment or hill taken into consideration. • Enclosed building 7) Certain truss span and pitch combinations may require a truss to be "piggybacked" due to shipping restrictions. 8) Trusses in excess of 80'-0" are possible - refer to TrusSteel Technical Bulletin TB991102. For additional information regarding large span trusses, contact a TrusSteel Authorized Fabricator. 9) Scissor trusses described in this table are designed with a bottom chord pitch equal to half of the top chord pitch (i.e. a 6/12 top chord pitch scissor truss will have a 3/12 bottom chord pitch). Many other top/bottom chord pitch variations are possible. 10) Designs may include multiple material thicknesses (mils or gauges) for top and bottom chords as determined by the designer using steelVIEW engineering software. Maximum steel thicknesses are 43 mils (18 GA) for the TSC2.75 chord 54 mils (16 GA) for the TSC3.00 an 97 mils (12 GA) for the TSC4.00 chord in table above. 11) Truss web patterns will be determined by the designer using steelVIEW engineering software. ROOF TRUSS SYSTEMS - SAMPLE SPANS ENGINEERED BY ALPINE S P E C I F Y I N G / D E S I G N I N G