BOM — Doors & Windows

Overview

Acoustic Doors

3 (D1, D3, D5)

Observation Window

1 (OW-1)

Highest STC

D1 / D5 — STC 50

Sound Lock

Buffer spine + D3

Door Schedule

ID	Location	STC	Size (cm)	Weight	Wall	Brand
D1	South wall, x=479cm (centre) → Video/Podcast (opens out; landing + security hinges)	50	90 × 220	~75 kg	Wall 4 (STC 50)	IAC Noise-Lock (via Gulf Acoustic LLC, Dubai)
D3	VO/Control partition, x=163.6cm (centre)	45	80 × 220	~55 kg	Wall 6 (STC 53)	AKINCO doorset Rw45 (Dubai; TR alt Dimak)
D5	South wall, x=90cm (centre) — Control external entry (opens out)	50	90 × 220	~75 kg	Wall 4 (STC 50)	IAC Noise-Lock (via Gulf Acoustic LLC, Dubai)

D-07 — Framed openings (BOQ): the D1 + D5 openings are NEW FRAMED OPENINGS in the SOUTH GYPSUM STUD wall — steel subframe/posts + head per the IAC doorset schedule; the subframe carries the ~75 kg leaf + slam loads; weatherseal D5. NO concrete cutting, NO lintels — the south wall is a stud wall (S3-SITE-TRUTH §2/§5); no usable existing openings exist on site. D-08: external threshold LANDINGS + step/ramp at D1 + D5 (inside FFL +150mm vs corridor slab) — landings BEFORE either door is hung; internal D3 threshold = SPLIT plate, one half per raft.

Per-Door Hardware

Component	D1	D3	D5
Frame gauge	16ga steel	18ga steel	16ga steel
Frame corners	Welded, sand/lead-filled
Hinges	4× heavy-duty SS	3× heavy-duty SS	4× heavy-duty SS
Hinge rating	100 kg minimum rated
Perimeter seal	Magnetic compression seal, continuous, all 4 sides
Drop seal	D3: Athmer Schall-Ex L-15/30 WS automatic drop seal (+1 spare set) · D1/D5: IAC factory-integral seals — no field additions
Neoprene gasket	Perimeter backup seal
Head gap	20mm sealant bed	18mm	20mm sealant bed

Door Leaf Construction (All Doors)

Asymmetric layered construction for maximum STC performance:

Outside →

Steel outer ........... 1.2mm

Butyl rubber .......... 1.5mm

MDF ................... 15mm

Rockwool RWA45 ........ 50mm core

MDF ................... 15mm

Butyl rubber .......... 1.5mm

Steel inner ........... 0.8mm (asymmetric)

← Inside

Asymmetric design: Different steel thicknesses (1.2mm outer vs 0.8mm inner) prevent coincidence — both faces resonate at different frequencies, improving broadband STC.

Observation Window OW-1

Size

80 × 50 cm

Sill height

110cm AFF

STC

Tilt

5° (prevents flutter echo)

Frame

Welded steel, rubber-isolated from wall

Seal

EPDM compression, desiccant in air gaps

Position

VO/Control partition (W6), x=47.7

Partition Y

280

Brand

IAC Noise-Lock window

Triple-Pane Construction

Glass ................. 6mm

Air gap ............... 100mm

Laminated glass ....... 10mm

Air gap ............... 75mm

Glass ................. 8mm

Asymmetric air gaps: 100mm + 75mm prevents coincidence resonance between panes. Different glass thicknesses (6/10/8mm) further decouple resonant frequencies.

Sound Lock Concept

The buffer spine (W5, STC 55) combined with D3 (STC 45) forms the acoustic buffer protecting VO Live from the corridor. D2 deleted (Rev2) — Control is entered only by external door D5, so the buffer's Control-side face is now a sealed wall with no door penetration, which improves isolation.

This is why the buffer spine exists — it's not just a corridor wall, it's the core of the isolation strategy protecting the most critical rooms.

Maintenance Checklist

Check	Frequency	Method
Seal inspection (all 4 sides)	Every 6 months	Visual + light test (no visible light through closed door)
Drop seal function	Every 6 months	Close door, verify seal drops and contacts threshold
Hinge torque	Annually	Check for sag, tighten if needed
Magnetic seal contact	Every 6 months	Paper test — paper should not slide through when door closed
Window seal (OW-1)	Annually	Visual inspection of EPDM compression