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Rackflow Journal

Notes from inside the data hall

Power and interconnection, layout, cost and estimating, and field notes from real installations. Written by the people building Rackflow.

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Cost and Estimating

What a 42U Cabinet Actually Costs to Build

A line-by-line teardown of the material, labor, and burden that go into a fabricated 42U cabinet, and why the sticker price is the least interesting number.

Dana Okafor·August 12, 2026·2 min read
Design and Layout

Hot-Aisle Containment, and When It Actually Pays

Containment is sold as a rule but it is really a threshold. Here is where the density math tips from optional to mandatory, and what it costs to cross it.

Dana Okafor·August 18, 2026·2 min read
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COST BASIS AS OF JAN 2026Pre-design screening. Not an engineering determination.