FICTIONAL OPEN ENCLOSURE ALTERNATIVES — ESTIMATING SCHEDULE REV A Units:inches. Outside6 x4 x2, no lid or hardware. Milled:6061 raw plate2.25 thick, finished6 x4 x2, cavity5.5 x3.5 x1.75, internal corner radius0.25. General tolerance+/-0.005. Nominal walls/bottom0.25. Formed:5052-H32 flat10 x8 x0.063, four90-degree bends, nominal2-inch walls. Corner reliefs, bend deductions and weld details require a production drawing. Weld allowance20 setup minutes/lot +8 minutes/body at$90/hour. Neither construction establishes equivalent stiffness, sealing, thermal or cosmetic performance. No released manufacturing drawing or enclosure rating.