Buffer Spine

W5 — STC 55 — The acoustic heart of the facility

Overview

Parameter	Value
Name	Buffer Spine
West face X	213.6 cm
East face X	228.6 cm
Thickness	15 cm
Wall type	W5 (STC 55, field 49–53)

Purpose

Acoustic separation between the west zone (VO Live + Control Room) and the east zone (Video Studio + Editing Suite).

HVAC routing — the ONLY permitted duct routing path between zones. All 5 silencer runs route through the buffer spine.

Circulation corridor via D2 (Control access, STC 45) and D4 (Studio/Editing access, STC 48).

This is not just a corridor wall — it is the core of the isolation strategy between the two most critical zones.

Wall Assembly W5

2×12.5mm gyp+GG (west face)
100mm steel studs + Rockwool infill
2×12.5mm gyp+GG (east face)

Lab STC: 55 | Field STC: 49–53

HVAC Routing Through Buffer

Run	Length	Attenuation	Serves
Run A	1500mm	40dB	VO Live (IDU-04)
Run B	1000mm	25dB	Trunk (splits to B1+B2)
Run B1	500mm	15dB	Control branch (IDU-03)
Run B2	300mm	10dB	Editing branch (IDU-03)
Run C	1000mm	25dB	Video Studio (IDU-05)

Main trunk B (1000mm/25dB) splits at a wye fitting into B1 (Control) and B2 (Editing). All 5 runs are shown separately — B1 and B2 are never collapsed into a single entry.

Column Detail [AC]

Parameter	Value
Column	COL_W
Dimensions	60 × 50 cm
Position	(369.1, 140.6)
Air gap	10mm [AC]
Detail required	Box-out detail for duct routing around column

Door Access

Door	STC	Location	Connects
D2	45	Buffer west face	Control Room access
D4	48	Studio/Editing partition	Studio ↔ Editing

Buffer Footprint

Design Constraints [AC]

[AC] COL_W at (369.1, 140.6) — 10mm air gap must be maintained, box-out detail required
[AC] All 5 silencer runs must route through buffer spine — no alternative paths
[AC] Duct penetrations through W5 must be sealed with acoustic sealant
Buffer spine is the ONLY permitted HVAC routing path between zones