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B3 Yellow Zone — Hard Numbers for Layout Lock-In
For: Gemini cross-session reference | Date: 2026-03-04 SUPERSEDED by v03
⚠ SUPERSEDED: This v01 file contains WRONG geometry (north wall 614.8 cm, area 29.13 m², room narrows going north). The correct values are in v03: north wall 860 cm, area 34.42 m², room WIDENS going north. Column positions also corrected in v03.
Zone Dimensions (All in Meters)
Shape: RIGHT TRAPEZOID (not rectangle)
NW (1.22, 4.31) ─────────────── NE (7.37, 4.31)
/ 6.15 m |
/ 4.48 m | 4.31 m
/ (diagonal) |
/ |
SW (0, 0) ──────────────────────────── SE (7.37, 0)
7.37 m
Origin = SW corner of south wall
X = east (→) Y = north (↑)
Core Measurements
| What | Value (m) | Value (cm) |
|---|
| South wall (E-W) | 7.37 | 737 |
| North wall (E-W) | ~6.15 | 614.8 |
| East wall (N-S) | 4.31 | 431 |
| NW diagonal | 4.48 | 448 |
| Diagonal horiz. component | 1.22 | 122.2 |
| Ceiling to slab | 3.50 | 350 |
| Effective height (after build) | 3.15 | 315 |
| Gross area | 29.13 m² | — |
| Effective volume | ~91.8 m³ | — |
Width at Every Level (for layout planning)
| Y from south (m) | Width E-W (m) | Notes |
|---|
| 0.00 | 7.37 | South wall |
| 0.50 | 7.23 | — |
| 1.00 | 7.09 | — |
| 1.11 | 7.06 | Column row |
| 1.50 | 6.95 | — |
| 2.00 | 6.81 | — |
| 2.50 | 6.66 | — |
| 3.00 | 6.52 | — |
| 3.50 | 6.38 | — |
| 4.00 | 6.23 | — |
| 4.31 | 6.15 | North wall |
Formula: Width = 7.37 - (Y / 4.31) × 1.22
Columns (2 structural, cannot move)
| Column | Width E-W (cm) | Depth N-S (cm) | West face X (m) | East face X (m) | South face Y (m) | North face Y (m) |
|---|
| COL-1 | 60 | 50 | 3.65 | 4.25 | 1.11 | 1.61 |
| COL-2 | ~55 | 50 | ~6.82 | ~7.37 | 1.11 | 1.61 |
- COL-1 center: (3.95, 1.36)
- COL-2 center: (~7.10, 1.36) — against east wall
- Column row: 1.11 m from south wall
- Both columns span from Y=1.11 to Y=1.61 (50cm deep)
- Build around without rigid coupling (isolate with neoprene/air gap)
Daikin VRF Indoor Units (from HVAC DXF)
Unit Inside/Near Zone
| Unit | Position in Zone | X (m from SW) | Y (m from S) | Confidence |
|---|
| U380 | Near SE corner | ~6.88 | ~0.50 | APPROXIMATE |
Units Outside Zone (adjacent areas)
| Unit | Where | Distance from Zone |
|---|
| U370/U371 (paired) | East of zone (B302 area?) | ~2.7 m east of east wall |
| U328 | Far east (different B3 section) | ~10+ m east |
Air Devices (Diffusers)
| # | Inside Zone? | Position |
|---|
| 1 | YES (barely) | ~1.73m E, near south wall |
| 2-6 | NO | 0.9 to 4.6m WEST of zone |
What This Means for Layout
- Only 1 VRF indoor unit (U380) appears to serve the yellow zone directly
- U380 is near the SE corner — close to the editing/entry area (good: non-critical zone)
- Most air devices are OUTSIDE the zone to the west — existing diffuser layout doesn't serve the yellow zone interior well
- This confirms we must redesign the “last mile” — new duct drops, new plenum boxes, new diffuser positions inside the rooms
- U380's position near editing/corridor aligns with Obai's plan: indoor unit sits OUTSIDE critical rooms, only ductwork penetrates
Wall Types (for construction planning)
| Wall | Type | What to Do |
|---|
| North | Concrete exterior | KEEP — build isolation wall inside with air gap |
| NW diagonal | Concrete exterior | KEEP — build isolation wall inside with air gap |
| East | 10cm gypsum → Server Room B313 | DEMOLISH old, build STC 58-68 wall (server noise: 55-65 dBA) |
| South | Interior partition | DEMOLISH, rebuild as acoustic partition |
Quick Reference for Gemini
LENGTH (E-W at south): 7.37 m
LENGTH (E-W at north): 6.15 m
WIDTH (N-S): 4.31 m
DIAGONAL (NW): 4.48 m
AREA: 29.13 m2
CEILING: 3.50 m to slab
VOLUME: 101.9 m3 raw
COL-1: center (3.95, 1.36), size 60x50cm
COL-2: center (~7.10, 1.36), size ~55x50cm
VRF U380: approximately (6.88, 0.50) — near SE corner
VRF U370/U371: outside zone, ~2.7m east
Width formula: W = 7.37 - (Y/4.31) * 1.22
Source: DXF analysis of SD-HVAC-ALL-241225-V02 + B3 Final Furniture layout 03.03.2026
Coordinate mapping approximate — HVAC contractor overlay needed for precision