Manufacturer

Lindner Group

Lindner Group, Arnstorf: metal ceilings, heating and cooling ceilings, raised floors, wall and ceiling linings and the MUTE+ sound absorber line.

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Documents

Fire protection Datasheet LMD F30 hook-in, hinged and slidable Datasheet LMD F90 hook-in, hinged and slidable

Metal fire protection ceiling LMD F30/F90

Name: Metal fire protection ceiling LMD F30/F90
Brand: Lindner Group

Description

Metal fire protection ceiling, hooked in and hinge-down and slidable. The build-up combines perforated sheet steel with acoustic fleece, for F 30 additionally a mineral wool insert, and a cladding of GKF/DF gypsum boards. Classified per DIN 4102-2 as F 30 from above and from below (abP P-2101/336/18-MPA BS) and as F 90 from above and F 30 from below (abP P-SAC-02 /III-648).

Technical data

Material: Galvanised steel sheet

Surface: Powder coating COLOURline, MOODline deep matt, ARTline decor, GRAPHICline digital printing

Up to fire class: A2-s1,d0 — applies to the metal ceiling element of galvanised sheet steel with acoustic fleece and powder coating

Certifications: CE per EN 13964, TAIM Technical Manual for Metal Ceilings, general building authority test certificate

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 4 variants

NRC

0.90

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.20	0.60	0.85	1.00	1.00	0.95

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			Value
Rg 2,5 - 16	2.6 in	1.6 in	NRC0.90
Rv 2,0 - 20	16 in	1.6 in Insula A2	NRC0.85
Rg 2,5 - 16	7.9 in	1.6 in	NRC0.85
Rg 0,7 - 4	2.6 in	1.6 in	NRC0.80

Test report: H201110/1a

NRC: 0.90 (derived from ISO 354 lab data)

Measured values as a table (4 measurements)

Metal fire protection ceiling LMD F30/F90: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	100 Hz	125 Hz	160 Hz	200 Hz	250 Hz	315 Hz	400 Hz	500 Hz	630 Hz	800 Hz	1000 Hz	1250 Hz	1600 Hz	2000 Hz	2500 Hz	3150 Hz	4000 Hz	5000 Hz
Rg 2,5 - 16 · 200 mm · 40 mm	0.85	0.29	0.25	0.33	0.38	0.41	0.57	0.72	0.87	0.96	1.00	1.06	1.02	1.02	0.97	1.00	1.00	1.01	0.96
Rg 0,7 - 4 · 65 mm · 40 mm	0.80	0.11	0.17	0.24	0.28	0.41	0.59	0.72	0.91	0.99	1.00	1.01	0.97	0.91	0.82	0.79	0.77	0.73	0.66
Rg 2,5 - 16 · 65 mm · 40 mm	0.90	0.10	0.17	0.33	0.47	0.64	0.73	0.81	0.88	0.90	0.95	1.01	1.04	1.01	0.97	0.95	0.93	0.96	0.93
Rv 2,0 - 20 · 400 mm · 40 mm Insula A2	0.85	0.39	0.36	0.41	0.40	0.47	0.60	0.73	0.87	0.95	0.96	1.05	1.04	1.06	1.06	1.04	1.02	1.07	1.06

Measured values as a table (4 measurements)

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Last updated: 09/14/2026