Steel Eckel Functional Panel (EFP) Type-2 HD

Heavy Duty Steel EFPs are the solution for loud, acoustically-harsh environments where added panel durability is desired to treat high ceilings, reflective surfaces and the din of industrial or recreational activities. Reverberation and noise can decrease performance and productivity while increasing safety hazards, creating unique challenges for facility managers.

EFP Type-2 HD 3-Part Spec


Heavy Duty (HD) EFPs are extra-durable, attractive, sound absorbing, and fire-resistant panels which can be spot located on walls and ceilings to achieve effective noise control. Since EFPs are independent panels, they can be fastened into place without disturbing existing utilities. This functional approach to acoustic control is less expensive than continuous ceiling or wall treatment.EFPs help solve a number of noise control problems. They can be added to barriers to increase noise reduction capability. Special aluminum EFPs, for example, have been attached to concrete barrier walls around transformers and waste water treatment plants, thereby enhancing the barriers’ acoustic performance as well as preventing a potential community noise problem.


Additional information

Sound Absorption

30" x 120" (760mm x 3050 mm) panel, Encapsulated in a 2.0 mil (0.05 mm) flame guard polyethylene, Tested in accordance with ASTM C 423 and E 795:

125 Hz

6.2 sabins

250 Hz

20.5 sabins

500 Hz

35.2 sabins

1000 Hz

34.5 sabins

2000 Hz

31.5 sabins

4000 Hz

33.1 sabins


0.99, minimum

Panel Construction


Panel Thickness

2 3/4" (70mm) "V" ridged facing


30" (760 mm).

Average Weight

30” x 120” (762mm x 3048mm) 60lb/27kg, 30” x 48” (762mm x 1219mm) 25lb/12kg, 30” x 60” (762mm x 1524mm) 30lb/14kg, 30” x 72” (762mm x 1829mm) 36lb/17kg, 30” x 96” (762mm x 2438mm) 49lb/22kg

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

1/4” (6 mm)-20 x 1” (25 mm) long bolts to attach mounting brackets to the panels, cadmium plated for steel panels, corrosion-resistant anchors for fastening brackets to substrate, See recommendations by panel manufacturer and by architect, stainless steel for aluminium panels


4” (100 mm) of clearance between back of panel and mounting surface, Four 11ga (3mm) steel brackets per unit for attachment to walls and ceilings, Other bracket lengths available




18ga (1.31 mm) electrogalvanized steel sheet, 3/32" (2 mm) Perforations on 3/16" (4.8 mm) staggered centers, V-ridged on 6" (150 mm) centers to a depth of 2-3/4" (70 mm)


20ga (0.9 mm) electrogalvanized steel, Channel shaped, Two 1/4-20” (508mm) threaded inserts for each framing member for attachment of panel mounting brackets


Factory applied, Polyurethane enamel paint

Flame Spread

10 Maximum

Smoke Density

10 maximum