Simplex's Lay-Away Series is installed rapidly on a standard exposed Zee bar with 15/16" face and make it an ideal concealed system. Considered to be a labor saver, this fine line joints system is easy to remove individually by lifting upward and be able to have access to the plenum. Accessibility System is 100% accessible. Every panel can be demountable with an upward motion. Panels Brake formed square or rectangular shapes are available in a wide range of standard or custom sizes - Contact us for more information (800-638-5726) or our Agent representative in your area for more details of this system capabilities and limitations. Perforations A variety of round, square, rectangular, oblong, slotted and custom perforation patterns are available to meet your project requirements. Please consult the factory Perforations link for more information. Finishes Simplex Ceilings offers a wide range of finishes applied on aluminum or steel alloys. Simplex Ceilings has custom finish selections to suit every customer need. Please consult the factory Finishes link for more information. Acoustics Simplex Ceilings offers a variety of sound absorbing backing, each of which can achieve a N.R.C. (Noise Reduction Coefficient) value ranging from .55 to .96. Please consult the Acoustical link for more information. Fire Rating All metal panels and associated suspension systems are Class I, 0-25 Flame Spread, as tested in accordance with ASTM E84. For more technical details, please refer to our Architectural Specifications and/or Technical Data links. Contact us (800-638-5726) or our Agent representative in your area.