Steel Delta Acoustic Panels (DAP)

DAPs combine a unique panel design and unrevealed edge geometry with outstanding sound absorption performance, ideal for busy restaurants, hotel lobbies and theatres. DAPs are ideally suited for correcting noise and reverb problems where people gather or work, including Pools & Recreational Facilities, Theatres & Auditoriums, Music Schools & Academic Environments, Power Plants & WWTPs as well as other Industrial & Transportation applications. For high humidity applications such as indoor pools or where panels may be exposed to oils or vapours, or for installation in dust-free clean rooms, the 2″ thick, fine fibered, fibrous glass acoustical insulation may be enclosed in 1.5-2 mil flameguard polywrap. All EFP Types are available in 4′ (1.2m), 5′ (1.5m), 6′ (1.8m), 8′ (2.4m), and 10′ (3.0m) sizes, permitting application in large or small spaces, as well as, restricted areas. Standard panel size is 10′ (3.0m).

DAP Type 1 3-Part Spec


The unique Delta Acoustic Panel design and edge geometry provide maximum sound absorption in flush mounted wall and ceiling applications. An NRC of 1.05 makes this panel ideally designed for restaurants, broadcasting studios, theatres, conference rooms and multi-purpose rooms. The panel’s 135 degree returned side construction creates an “unrevealed” edge so that the panel sides are virtually invisible – a truly unique design with outstanding acoustical performance.


Additional information

Sound Absorption

24" x 88" (610 mm x 2235 mm) panel, Tested in accordance with ASTM C 423 and E 795:


2" (51mm) Flush, 3" (76mm) to 2" (51mm) Space Mounting

125 Hz

4.5 sabins Flush, 5.3 sabins Space Mounted

250 Hz

11.6 sabins Flush, 16.9 sabins Space Mounted

500 Hz

11.7 sabins Flush, 21.7 sabins Space Mounted

1000 Hz

18.3 sabins Flush, 18.8 Space Mounted

2000 Hz

13.2 sabins Flush, 16.08 sabins Space Mounted

4000 Hz

09.0 sabins Flush, 10.93 sabins Space Mounted


0.99, minimum

Panel Construction


Panel Thickness

24" x 88" (610mm x 2235mm)

Average Weight

24” x 42” (610mm x 610mm) 14lb/7kg, 24” x 88” (762mm x 2235mm) 27lb/12kg

Acoustical Insulation

2” (50 mm) thick, Density of not less than 1.5 pounds per cubic foot (24 kg/cubic m), Encapsulated in a 1.5 to 2 mil flame guard polyethylene, Fibrous glass, Fine fibred

Anchors & Fasteners

#10-3/4" self-tapping sheet metal screws to attach mounting angles, cadmium plated for steel panels, corrosion-resistant anchors for fastening brackets to substrate, See recommendations by panel manufacturer and by architect


4ga (13 mm) steel brackets for 4" (102 mm) space mount., Two 20ga steel angle mounting brackets (Standard for flush mount) per unit for attachment to walls and ceilings




0.032 inch (0.8 mm) aluminum sheet, Edge construction to create an "unrevealed edge", perforated with 3/32” (2 mm) holes on 3/16” (4.8 mm) staggered centers, Sides and end of panel with 135 degree returned side


20ga (0.9 mm) electrogalvanized steel, Angle mounting assembly pre punched and secured with #10 sheet metal screws for flush mount


Polyurethane enamel paint

Flame Spread

10 Maximum

Smoke Density

10 maximum