DOUBLE-LEAF STUDIO WINDOW

 

 

 

 

 

 

 

 

 

 

 

HTA-W-DL56

PHYSICAL SPECIFICATION

Construction

Frame material

Pane 1 (CR side)

Air cavity

Pane 2 (LR side)

Pane angle offset

Reveal depth (min.)

Standard openings

Custom sizes

Frame sealing

Viewing clarity

Two independent panes, structurally decoupled

Cold-rolled steel, powder-coated

90 mm (silica gel desiccant filled)

10 mm annealed float glass

12 mm laminated safety glass

3° – 7° (adjustable during install)

300 mm wall construction required

900 × 600 mm to 1800 × 1200 mm

Yes

Dual-layer neoprene gasket, continuous bead

High-transmission low-iron glass option


ACOUSTIC PERFORMANCE

 

STC rating

Rw (weighted)

Worst-case frequency

Test standard

52 – 56 dB

51 dB (ISO 717-1)

~160 Hz (coincidence dip)

ASTM E90 / ISO 10140-2


INSTALLATION REQUIREMENTS

Wall build-up minimum

Structural lintel

Vibration isolation

Conditioned cavity

300 mm — double-leaf masonry or stud

Required — engineer to specify

Neoprene pad at all bearing points

Recommended — prevents condensation

 

Installation note: The pane angle offset is the single most important installation variable. Eliminating parallel glass surfaces adds 4–6 dB of flutter-echo rejection across mid frequencies. Even a 3° offset is highly effective.