Expanded metal ceiling LMD-St

Name: Expanded metal ceiling LMD-St
Brand: Lindner Group

α_w 0.90–1.00Absorber classes A, B

Ceiling

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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-St 213 Datasheet LMD-St 214 Datasheet LMD-St 700 BWS Datasheet acoustic insert Calma Datasheet acoustic insert Acustica Datasheet expanded metal MESHdesign

Description

Expanded metal ceiling with an open mesh structure. From about 30 percent open area the mesh counts as acoustically transparent, and the absorption is then determined by the acoustic insert of Acustica or Calma. Recycled content 24.3 percent.

Technical data

Material: galvanised sheet steel, expanded metal of steel

Surface: Powder coating COLOURline, MOODline deep matt, expanded metal MESHdesign

Up to fire class: A2-s1,d0

Certifications: CE per EN 13964, EPD per EN 15804, TAIM Technical Manual for Metal Ceilings, VOC emission class A+, Indoor Air Comfort Gold, Oeko-Tex Standard 100 (Acustica and Calma acoustic inserts)

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 8 variants

α_w

1.00

Frequency values

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			Value
62 x 23 x 3 x 2.5	with acoustic fleece	30 mm Insula A2	α_w1.00
62 x 20 x 7.5 x 2.0	with acoustic fleece	20 mm Insula B1	α_w1.00
62 x 20 x 7.5 x 2.0	with acoustic fleece	30 mm Acustica	α_w0.95
62 x 20 x 7.5 x 2.0	without acoustic fleece	20 mm Insula B1	α_w0.95
62 x 20 x 7.5 x 2.0	with acoustic fleece	25 mm Calma	α_w0.95
62 x 20 x 7.5 x 2.0	without acoustic fleece	25 mm Calma	α_w0.90
62 x 20 x 7.5 x 2.0	without acoustic fleece	30 mm Acustica	α_w0.90
62 x 20 x 7.5 x 2.0	without acoustic fleece	20 mm Acustica	α_w0.80

Absorber class: A

Test report: H100923_2

Distance: 200 mm

Test setup: with acoustic fleece

Absorber: 30 mm Insula A2

Measured values as a table (8 measurements)

Expanded metal ceiling LMD-St: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	α_w	Absorber class	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
62 x 23 x 3 x 2.5 · 200 mm · with acoustic fleece	1.00	A	0.43	0.55	0.64	0.62	0.83	0.92	0.90	0.95	0.94	0.91	0.93	0.98	0.99	0.97	0.98	0.95	0.90	0.87
62 x 20 x 7.5 x 2.0 · 200 mm · with acoustic fleece	1.00	A	0.28	0.43	0.48	0.76	0.74	0.84	1.03	1.02	0.97	0.88	0.87	0.99	1.01	1.00	0.98	0.96	0.92	0.90
62 x 20 x 7.5 x 2.0 · 200 mm · with acoustic fleece	0.95	A	0.23	0.30	0.46	0.69	0.69	0.81	1.00	0.99	0.96	0.91	0.84	0.95	1.00	1.00	1.00	1.00	1.00	1.00
62 x 20 x 7.5 x 2.0 · 200 mm · without acoustic fleece	0.95	A	0.27	0.42	0.49	0.73	0.74	0.82	1.02	1.02	0.97	0.91	0.86	0.96	1.02	1.00	0.97	0.93	0.86	0.82
62 x 20 x 7.5 x 2.0 · 200 mm · with acoustic fleece	0.95	A	0.21	0.42	0.49	0.82	0.81	0.84	0.90	0.89	0.88	0.85	0.90	0.98	1.01	1.03	1.03	1.04	1.05	1.03
62 x 20 x 7.5 x 2.0 · 200 mm · without acoustic fleece	0.90	A	0.14	0.28	0.44	0.74	0.80	0.81	0.88	0.88	0.86	0.85	0.89	0.97	0.98	1.01	1.03	1.01	1.00	0.98
62 x 20 x 7.5 x 2.0 · 200 mm · without acoustic fleece	0.80	B	0.13	0.16	0.30	0.46	0.51	0.64	0.79	0.81	0.80	0.76	0.70	0.78	0.86	0.84	0.86	0.86	0.86	0.88
62 x 20 x 7.5 x 2.0 · 200 mm · without acoustic fleece	0.90	A	0.16	0.21	0.36	0.58	0.62	0.77	0.91	0.92	0.90	0.87	0.81	0.89	0.95	0.93	0.94	0.93	0.93	0.92

Measured values as a table (8 measurements)

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Last updated: 04/11/2026

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