This structural detail specifies the design loads and chord bending requirements for steel roof trusses. In warehouse areas, an additional point load of 500 pounds must be applied at any joint causing maximum stress. In office areas, an additional point load of 1000 pounds is required at any critical stress joint. Top and bottom chords require checks for bending moments of 250 pounds and 200 pounds respectively, which are not additive loads. A three-inch nailer sits atop the upper chord of the joist.
FH= 41.0K (LRFD) 3x NAILER WAREHOUSE AREA: IN ADDITION TO THE ROOF LOADS ADD A POINT LOAD OF 500# @ ANY JOINT WHICH WILL CAUSE MAX STRESS OF TRUSS OFFICE AREA IN ADDITION TO THE ROOF LOADS AND FLOOR LOADS, ADD A POINT LOAD OF 1000# @ ANY JOINT THAT WILL CAUSE MAX STRESS OF TRUSS. JOIST (SEE MANUFACTURER'S DRAWINGS FOR DIMENSIONS) CHECK TOP CHORD BENDING FOR 250#. CHECK BOTTOM CHORD BENDING FOR 200#. THESE ARE NOT ADD LOADS.
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