4" square box

What’s in this rate

This unit is a 4-inch square steel box with a single-gang ring, mounted in a new stud wall. One box is one each. It covers the box, the ring, and fastening it to the stud. The device, a fire-rated box, and cutting into an existing finished wall are separate units.

Build-up

Labor 0.25 hr × $70.00 wage and burden

$17.50

4" square box

$6.51 HD

Single ring

$1.98 HD

Material and small tools

$9.16

Direct rate (labor, material, and tools)

$26.66 / EA

Overhead 10% of direct

$2.67

Fee 10% of (direct and overhead)

$2.93

Loaded rate

$32.26 / EA

Worked extension: 24 new boxes on a small office TI × $32.26 = $774.24 loaded for 24 EA. Quantity is a worked extension.

Related rates

• 20A spec-grade receptacle — $33.92 / EA
• Single-pole switch — $27.69 / EA

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