A built-up concrete mechanical pad sits atop a concrete fill over metal deck supported by a structural steel beam. The pad features a foam void form at its core and is reinforced with number four bars spaced at eighteen inches on center each way at mid-depth, alongside two continuous number four bars and number four dowels extending two feet six inches into the curb centered at eighteen inches on center. The overall pad height measures six inches minimum with a one foot six inch maximum structural assembly depth, while maintaining a three-quarter inch clearance above the metal deck flutes.
BUILT-UP CONC MECH PAD 1'-6" MAX S.A.D. MIN 6" TYP 8" S.M.D. CONC SLAB w/ #4 AT 18"o.c. EACH WAY, MID-DEPTH FOAM VOID-S #4 x AT 18"o.c. CENTERED ON CURB 2-#4 CONTIN CONCRETE FILL OVER METAL DECK SEE PLAN & 2'-6" 2'-6" CLR 3/4" S-5101 2
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