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The MINERALLAC fbo234 is a pre-galvanized steel electrical box mounting bracket designed to support electrical outlet boxes on wood or metal studs. Stamped from pre-galvanized steel for corrosion resistance, this box support spans stud widths of 2.5 inches, 3.5 inches, and 4 inches, covering the most common framing dimensions found in residential and light commercial construction. Licensed electricians install this bracket to secure electrical boxes flush within stud bays before drywall installation, eliminating the need for blocking or additional framing lumber.
This bracket is suited for new construction and retrofit wiring applications in both residential and commercial settings. It works with wood-framed and metal-framed walls, making it a practical stock item for electrical contractors who work across multiple building types. The pre-galvanized finish holds up in unconditioned spaces where bare steel would be prone to surface rust. It is manufactured in the USA.
Designed as an OEM-style replacement and standard-fit bracket for electrical outlet boxes mounted to wood or metal studs with nominal widths of 2.5 inches, 3.5 inches, or 4 inches.
Installation is performed by licensed electricians in accordance with NEC requirements for box support and mounting. Power down the circuit before working near any existing wiring in the stud bay. Confirm the stud width matches one of the three supported dimensions before securing the bracket. Do not over-deflect the bracket during positioning, as stamped steel has defined flex limits.
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