A six-inch concrete wall utilizes a four-inch stud wall as a lost form in front of structural steel framing members. W27 and W30 wide flange steel shapes connect with ASTM A325 bolts spaced at twelve inches on center.
W30 4" STUD WALL, LOST FORM FOR CONC. WALL IN FRONT 6" W27 W27 W27 A325 @ 12" OC
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