LAMEEKOUST DELTA : 3A - COMPLIANT SOUND ABSORBENT PANEL SYSTEM  

The Lameekoust Delta:3A Panel System, having an aluminium outer construction with a high performance, inert, non-combustible, vermin and mould resistant, and low bio-persistence, bio-soluble, sound absorptive infill material, has been developed for use in demanding environments such as underground transport systems. Unlike mineral fibre and other sound absorptive materials, which normally incorporate smoke-emitting binders, the base material of the Lameekoust Delta:3A System is a modified calcium-magnesium-silicate blanket manufactured without binders and which, if ingested, has an enhanced solubility in the human body. Consisting of a zero-smoke micro-mesh grey-tone platen behind the perforated front panel of the aluminium tray enclosing the acoustic infill, the Lameekoust Delta:3A System is considered to be another significant advance in terms of material systems with enhanced safety factors suitable for use in restricted spaces such as underground platforms and passageways, the product with the facing panel finished in high quality Lameek LP3 Polyester Powdercoat (PPc) RAL 9016X having been independently tested (*) and shown to comply with BS 476 Part 6:1989 Fire Propagation, with BS 476 Part 7:1999 Class 1 Surface Spread of Flame, with BS 6853: 1999 D8.4, and London Underground Standard 2-01001-002 Section 5.2.3–Toxic Fume Emission, and is currently being independently assessed against LUL Standard 1-085 Issue A2, the product being available with alternative finishes when specified, subject to testing for system compliance, the Lameekoust Delta:1, with a mill-aluminium finish, having been previously tested for compliance. The inherent acoustic performance of the product may be moderated by the mounting arrangement, the Certified (**) Octave Band Sound Absorption Coefficients for Delta 1, in a typical tunnel lining configuration, being as tabled below together with the equivalent predicted values for Delta 3A.

(*) Independently tested by the Building Research Establishment (BRE Testing Ltd), UKAS Accredited Testing Laboratory No.0578, Test Reports Nos. 242770, 242771 Rev.1, 242342 Rev.1, 243058, 232996, 232996 and as summarised in Test Evaluation Report No: 242772 A

(**)Independently tested in accordance with BS EN ISO 354: 2003 and BS EN 11654: 1997 by the Acoustical Investigation and Research Organisation Limited, UKAS Accredited Testing Laboratory No. 0483.