K&K Data Service Inc.Data Center Lab

Data Center Lab

GB300-class data center drawings: four public books

Electrical, structural, network and liquid-cooling books for a direct-liquid-cooled GPU hall at 136 kW per rack. Free PDF, no account required, SHA-256 checksum on every file.

These documents are published at Design Development — Public Edition status (electrical P3, structural P2, network P2, liquid cooling P1): reference designs for study and evaluation, carrying their own assumptions and open items. They are not construction issues and are not sealed by an Engineer of Record. Reuse follows the copyright and attribution terms stated inside each document. GB300 is a product of NVIDIA Corporation; K&K Data Service Inc. is not affiliated with NVIDIA.

Who publishes this

K&K Data Service Inc., Houston. K&K self-performs data center field work (site and civil work, foundations, steel erection, rigging, retrofits inside live facilities; its finished jobs are bitcoin-mining sites in Texas, Mississippi and Arkansas, 2023–2025) and is developing this GB300-class project for its own account. The project is designed and not yet built. These four books are its design record: Design Development — Public Edition, for study, not construction, no engineer’s seal. Electrical installation on any built project is by licensed electrical contractors and the sealed design by that project’s Engineer of Record. K&K holds no engineering registration and no electrical contractor license. Founder: Rui Liang. Company · The four jobs · inquiry@kkdatasvc.com

  1. 6.9 MB · 108 pagesElectrical Design — Public Edition P3108-page electrical design development set (design revision of 22 Oct 2026): 12.47 kV medium-voltage distribution, 13 UPS paths across a six-path and a seven-path zone, 16 generators in four segments with three bus ties, rack and CDU dual-input distribution, per-path ATS, UPS and plant-control details, grounding and transformer installation.SHA-256: 839C994A6151711CC7E70E51EF8F0A0236C9AF2747C5F9FB971E06A3D7DBCC5F
  2. 47 MB · 187 pagesStructural Document Set — Public Edition P2187-page structural document set: overview, 101 drawing sheets regenerated from native sources (including a new equipment/support coordination plan) and 75 pages of technical specifications for a prefabricated steel GPU hall carrying ~1.4 t liquid-cooled racks.SHA-256: 0ECF524E29D5FC50A3A8AE2F151F589CDEF6D32804838A61A764E06C7236412E
  3. 1.6 MB · 75 pagesGPU Hall Network Reference Design — Public Edition P275-page network reference design for a 90-rack GB300 NVL72 deployment: 30 reissued drawing sheets, an implementation supplement (storage capacity examples, optical cabling checks, acceptance tests) and a full register of design inputs still to be confirmed.SHA-256: 7905D4A32EF275C9FEF2B867D49E93EB4AEA3EC6FC7302D9129EDE93BB36E2CF
  4. 3.1 MB · 38 pagesLiquid Cooling Reference Design — Public Edition P138-page functional P&ID and coordination set for a 90-rack, five-group direct-liquid-cooling layout: cold-source selection trains (dry/wet coolers), CDU groups, six-rack unit details, buffer and transfer design requirements.SHA-256: 3EF5D8B90A38EB563D371CA653A204F07E77DAE28740103FC13852D6E65CACBC
  5. 5 KB · 4 artifacts + READMEBIM Machine-Audit Sample PackFour unedited artifacts from the machine audit of one Revit electrical model: the metadata-only readback that passed, the strict readback that failed the same model (78 systems, zero native AllRefs edges), the 1,539-port register coverage gate, and an AI reviewer's closure verdict with allowed and forbidden claims.SHA-256: C1561E7082C00C2DB96A1F6C15F4458D2544BFADDF8CDAE40E7F96C8DF43EA32
  6. 34 KB · code + datasetStorage-Capacity Model — Companion CodeThe Python capacity model behind the published storage-capacity paper (DOI 10.5281/zenodo.23247527): scenario definitions S01–S14d, 60 unit tests, and a reproduce.py that rebuilds the paper's supplementary dataset and verifies every number against the published copy. Standard library only, MIT license. Also on GitHub (kkkdata/storage-capacity-model) and archived as DOI 10.5281/zenodo.23251772.SHA-256: 28E68E870A0C557BF3CD43EFFA7132313CDDBFE676B0170BC0A7A61178F58E28
  7. 7 KB · 2 pagesGPU Hall Design Readiness ChecklistTwo-page review checklist distilled from the published reference design record: 28 verifiable items across electrical, liquid cooling, water, structural, network, BIM validation and evidence discipline — each item condensing a published analysis. CC-BY-4.0.SHA-256: F100DCB7C6A8B0386BD37551FC7EA32FAA403137D7BF2F512A7FD8287AD9E8D0
  8. 131 KB · 4 pagesPG25 Loop Commissioning and Fluid-Care ChecklistFour-page field checklist for PG25 liquid-cooling loops: design and procurement checks, records, flushing, fill and start-up, the sampling plan by risk level, in-use limits with first actions, in-line monitoring limits, and a blank sample log. Adapted from the OCP PG25 Guidelines (Revision 2.0, September 2026) with page references. CC BY-SA 4.0.SHA-256: C5C23B88585EFA22E1DB13349FC5CFB74960DC960145E2466A5948E21C44764E
  9. 1 KB · 14 rowsPG25 Property Table (CSV)Density, specific heat, thermal conductivity, dynamic and kinematic viscosity, Prandtl number and volumetric heat capacity of 25% propylene glycol from −5 to 60 °C, computed with CoolProp (ASHRAE-based model) and cross-checked against a second model. The table behind the PG25 coolant properties page.SHA-256: FE956D1755272D3E811695E396E90CCA05CBDFE93C307986EB8C7BE5038532B6
  10. 3 KB · 3 templates + READMEMachine-Audit Template PackBlank JSON templates for evidence-gated design checks and model-audit runs, in the shapes used on K&K’s own model audits: a run contract (scope, stop conditions, frozen input hashes), an independent readback, and a closure verdict with an allowed claim and a forbidden-claims list. CC-BY-4.0.SHA-256: FA75D21C267AADC312E8D8B8C528EAA6CC4081F3C02E5B358DEA6E8AF2D9E18A
  11. 56 MB · 4 documentsCurrent Drawing Set — Combined ZIP (27 Oct 2026)The four current public editions in one archive: electrical P3, structural P2, network P2 and liquid cooling P1, with a SHA256SUMS.txt covering each file.SHA-256: 2F9D5BB207196924111E604128E6545EEB710F4EB3F2D9A6BB85A65B20067322
  12. 97 MB · 3 documentsElectrical + Structural + Network — Combined ZIP (P1 set, 28 Sep 2026)The three original Public Edition P1 documents in one archive, as first released (electrical 88 pages, structural 170, network 58). Kept for articles that cite P1 page numbers; all three have newer editions above.SHA-256: 619F031CD63F497512A4B6E28397FD58778929DE3FA8F4C0880A633ECEBEE068

Current editions at a glance

BookEditionPagesReleasedSheets online
ElectricalPublic Edition P310827 Oct 202625 sheets
StructuralPublic Edition P218726 Oct 20264 sheets
NetworkPublic Edition P2757 Oct 202616 sheets
Liquid coolingPublic Edition P1386 Oct 2026—

Basis for all four: 90 racks at 136 kW, 12.47 kV service to 480Y/277 V, direct liquid cooling on PG25, dry coolers. Design Development — Public Edition: unsealed, for study and evaluation. Superseded editions stay available below; Lab articles that cite P1 page numbers keep their P1 links. Every file has a SHA-256 checksum.

What Is Inside the Set

The electrical design set (108 pages, Public Edition P3) carries the 12.47 kV single-line diagrams, transformer and fuse details (2500 kVA, 12.47 kV–480Y/277 V), zone one-lines for 13 UPS paths (six in one zone, seven in the other) serving 90 rack positions at 136 kW per rack, the 16-generator plant in four segments with three bus ties, per-path ATS, UPS and control details, rack and CDU dual-input sheets, grounding, and buried-crossing and transformer-installation interfaces. The structural set (187 pages, Public Edition P2) contains the design basis and parameters, the prefabricated steel drawings, and the full technical specification. The network reference design (75 pages, Public Edition P2) carries 30 drawing sheets, an implementation supplement and a register of inputs still to be confirmed. The liquid-cooling reference design (38 pages, added 6 Oct 2026) is the functional P&ID and coordination set for a 90-rack, five-group direct-liquid-cooling layout: cold-source selection trains, CDU groups, six-rack unit details and the buffer/transfer design requirements. All four disciplines describe one coordinated GB300-class facility design — the same program documented across the 108-article Data Center Lab.

K&K develops a GB300-class project for its own account and self-performs data center field work for other owners; this set is its own design record. If the set maps to a project you are planning, the project record shows the delivery side, and a project brief starts the conversation.

Release History

  • 4 Nov 2026 — 3ds Max source scene re-exported as version 2026-11-04 (3ds Max 2027, 24,543 objects, 72 textures on relative paths, 858 MB): scene names normalized, private metadata cleared, 108 internal-only objects removed, vehicle replaced; two native previews added. The 2026-09-29 package is withdrawn. 3D model page.
  • 27 Oct 2026 — PG25 Loop Commissioning and Fluid-Care Checklist (4 pages, CC BY-SA 4.0) and a PG25 property table (CSV) added; the PG25 coolant guide expanded with properties from −5 to 60 °C, PG25-vs-water ratios by temperature, a flow-per-kW calculator and the OCP PG25 Guidelines (Revision 2.0) limits.
  • 27 Oct 2026 — Electrical set updated to Public Edition P3 (108 pages: 6 publication pages and 102 drawing sheets) from the 22 Oct 2026 design revision. Compared with P1: new publication front matter (design basis, conditions and drawing index), 15 new E-900 sheets for rack-unit CDU dual-input branches, and revised sheets including E-104, E-105, E-107, E-108, E-201 to E-205 and E-7061; sheet E-301 (the 12.47 kV site route, with 12 committed transformer footprints and one proposed) is not included in P3; the P1 book that contains it remains available. New combined ZIP of the four current editions. Public Edition P1 (88 pages) remains available; Lab articles that cite P1 page numbers keep their P1 links.
  • 26 Oct 2026 — Structural Document Set updated to Public Edition P2 (187 pages): all 101 drawing sheets regenerated from native sources, a new equipment/support coordination plan (S-050) and local bolt setting-out amendment (S-607), revised index and reading order, and technical specifications expanded to 75 pages. Public Edition P1 (170 pages) remains available for reference; Lab articles that cite P1 page numbers keep their P1 links.
  • 9 Oct 2026 — GPU Hall Design Readiness Checklist (28 review items, 2 pages) and Machine-Audit Template Pack (blank run-contract / readback / closure-verdict JSONs) added; new guides: BIM validation check catalog, PG25 coolant properties.
  • 8 Oct 2026 — BIM Machine-Audit Sample Pack (four unedited audit artifacts with a field-by-field README) and Storage-Capacity Model companion code (reproduces the published paper dataset number-for-number) added.
  • 7 Oct 2026 — Network Reference Design updated to Public Edition P2 (75 pages): all 30 sheets reissued with clarified wording, new implementation supplement, and a full open-items register. Public Edition P1 (58 pages) remains available for reference.
  • 6 Oct 2026 — Liquid Cooling Reference Design Public Edition P1 added: 38-page functional P&ID and coordination set (new discipline, first public edition).
  • 28 Sep 2026 — Initial Public Edition P1 release: electrical (88 pages), structural (170 pages) and network (58 pages) sets with published SHA-256 checksums.

Guides to the Set

You can also browse 45 sheets of the set online (33 vector, 12 raster) with device-by-device explanations.

Questions Engineers Ask

Are these drawings suitable for NVIDIA GB300 NVL72 deployments?

The electrical, cooling-interface and structural basis is designed around 136 kW A/B dual-input, direct-liquid-cooled rack duty — consistent with GB300-class rack systems (~135–150 kW per rack, fully liquid cooled). They are Design Development — Public Edition reference designs: verify every interface against your OEM's current rack data before use. GB300 is a product of NVIDIA Corporation; K&K Data Service Inc. is not affiliated with NVIDIA.

Why don't these drawings carry an engineer's seal?

K&K holds no engineering registration and is not the Engineer of Record. These books are reference designs for study, not construction issues; a built project's Engineer of Record seals that project's drawings. Every sheet says so.

Can I build from these drawings?

No. They are published at Design Development — Public Edition status for study and evaluation; each book states its own edition (P1, P2 or P3) on its cover. They are not construction issues, carry no Engineer of Record seal, and every sheet states its own assumptions and open items.

Do I need to register or pay to download?

No. Every file is a direct download with a published SHA-256 checksum so you can verify integrity.

What electrical architecture do the one-line diagrams show?

12.47 kV medium-voltage service stepping to 480Y/277 V through 2500 kVA transformers, with radial multi-path distribution (loadbreak → fused primary → transformer → secondary breaker → ATS → 2 MW UPS → PDU) to the two GPU zones (90 racks at 136 kW per rack; six UPS paths in one zone, seven in the other), plus generator feeder interfaces and buried-utility crossing details.

How is structural design handled for ~1.4-tonne GPU racks?

The structural set covers the prefabricated steel building system: design basis and parameters, member and connection drawings, and technical specifications — the load path that carries dense liquid-cooled rack rows and overhead services.

What does the network reference design cover?

GPU hall network topology, cabling architecture and interface definitions for a liquid-cooled hall, at reference-design depth.

What does the liquid-cooling reference design cover?

A 38-page functional P&ID and coordination drawing set for a 90-rack, five-group direct-liquid-cooling layout: dry/wet cold-source selection trains with dedicated pumps, CDU groups with A/B secondary loops, six-rack unit details, and the buffer, transfer and failure-response design requirements. It is a functional P&ID set, not a 3D installation model; assumptions and unconfirmed parameters are identified on the drawings.

Questions about any sheet or parameter: inquiry@kkdatasvc.com or the contact page.