b'Acurlite Structural Skylights, Inc.22 Installation Manual 23GlossaryScale 1/8 AAMA American Architectural Manufacturers Association.A national trade association that establishes voluntary standards for the window, door and skylight industry.Adhesive Failure Failure of the bond between the sealant and the surface to which it is in contact.Aesthetics The science and philosophy of beauty.Wall system layer(s) that limits the transfer of liquid water and air through the system.The barrier Air and Water Barrier shall be adequate to withstand design wind load requirements, either independently or through a backup system.The terms air and water barrier and/or air/water barrier may also indicate a material that is also a vapor retarder.Air Leakage The flow of air which passes through fenestration products.Anchor Any device used to secure a building part or component to adjoining construction or a supporting member. Annealed Glass Raw glass used as a glazing product.Further processing is required to transform annealed glass into safety glass.Autoclave A vessel that employs high pressure and heat.In the glass industry, used to produce a bond be-tween glass and the interlayer, creating a laminate glass product.Backer Rod A material placed into a joint, primarily to control the depth and shape of the sealant.Also serves as a bond breaker.The wind velocity used to calculate external pressures acting on a surface of structure.Basic Wind Basic Wind Speed Speed is expressed in miles per hour (mph) or kilometers per hour (kph) and is based on wind speed maps included in building codes or other related standards.Bite The dimension by which the inner or outer edge of the frame or glazing stop overlaps the edge of the glazing.Bond Breaker A material used to prevent three-sided adhesion in sealant joints.Sheet stock bent or broken to desired shape, as required by specific job, on a power or manual Brake Shape brake machine.This shape is often used to cover conditions which cannot be covered by a stock shape.An insulated glass unit where a tube or a hole is factory-placed into the units spacer to accom-Breather (Tube) Units modate elevation or pressure differences encountered in shipping.These tubes or holes are to be sealed on the job-site prior to unit installation.British Thermal UnitThe heat required to increase the temperature of 1 lb. of water 1 degree F.(BTU)The assembly or assemblies of materials and components that enclose building spaces and are Building Envelope exposed to exterior space or separate conditioned interior space from unconditioned interior space.Caulk The application of a sealant to a joint, crack or crevice.Centerline (C.L.) A line used to indicate the center of symmetrical objects.Cohesive Failure Failure characterized by splitting within the sealant resulting from over extension.When materials maintain physical and functional properties when in direct contact or close prox-Compatibility imity to each other.The ability of two or more materials to exist in close association for an indefi-nite period with no adverse effect of one on the other.Concentrated Load A force applied to a fixed point. www.acurlite.com570.759.6882'