This detail specifies structural loading criteria for steel joists and trusses, including a three-by nailer attached to the top chord. The design requires checking top chord bending for 250 pounds and bottom chord bending for 200 pounds, noting these are not additional loads. For warehouse areas, a 500-pound point load must be applied at any joint that induces maximum truss stress in addition to standard roof loads. For office areas, a 1,000-pound point load must be applied at any joint that induces maximum truss stress in addition to standard roof and floor loads. The horizontal force is specified at 17.0 kips based on Load and Resistance Factor Design.
Text on the drawing
OF BOLT AS REQUIRED FOR WIND UPLIFT. JOIST/GIRDER JOIST (SEE MANUFACTURER'S DRAWINGS FOR DIMENSIONS) CHECK TOP CHORD BENDING FOR 250#. CHECK BOTTOM CHORD BENDING FOR 200#. THESE ARE NOT ADD LOADS. WAREHOUSE AREA: IN ADDITION TO THE ROOF LOADS ADD A POINT LOAD OF 500# @ ANY JOINT WHICH WILL CAUSE MAX STRESS OF TRUSS FH= 17.0K (LRFD) 3x NAILER 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.
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