Steel joist top and bottom chords require stiffening when subjected to concentrated loads. Two L2x2x3/16 inch angles are installed on each side of the joist web to reinforce the chord, secured with a 1/8 inch fillet weld, typical for both top and bottom chords. Stiffeners are required if the concentrated load is located greater than 3 inches from a panel point of the joist. If the concentrated load is less than 101 pounds, the stiffener is not required.
DETAIL BOOK REF. SHEET: S2.24 TO NEAREST PANEL POINT ON BOTTOM CHORD TO NEAREST PANEL POINT ON TOP CHORD LOCATION OF CONCENTRATED LOAD JOIST SEE PLAN NOTE: STIFFENER NOT REQUIRED IF CONCENTRATED LOAD IS LESS THAN 101 POUNDS. STIFFENER REQUIRED IF LOAD IS GREATER THAN 3" FROM PANEL POINT OF JOIST JOIST PER PLAN LOCATION OF CONCENTRATED LOAD 2-L2x2x3/16, EA SIDE OF JOIST 2-L2x2x3/16 , EA SIDE OF JOIST 1/8 TYP. TOP AND BOTTOM CHORD > 3" > 3" SCALE: 3/4" = 1'-0" S303
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