All Aluminum Surface Mounted       SA: Single Wing, Floors         DA: Dual Wing, Floors         FA: Single Wing, Hinged, Floors         DT: Cover Plate, Floors         RA: Overlapping Plates, Floors         SW: Cover Plate, Floor to Wall         PD: Heavy Duty, Hinged, Floors         PDW: Heavy Duty, Hinged, Floor to Wall         BWF: Drywall Cover Plate         Thermal       TM: Floor to Floor         TC: Walls or Ceiling/Flat         Seismic       NB: No Bump System         Exterior       SAN: Compression Seal         EW: Exterior Seismic, Walls         RJ: Aluminum, Roof to Roof   Description Sizes Options Technical Specs CSI Specs CAD Drawings Competition Comparisons Nystrom EW Series Our EW Series is a weathertight seismic system for interior and exterior walls and is available with a secondary moisture barrier. This system can accommodate thermal and multidirectional seismic movement in both walls and ceilings. Both are available in standard black, beige, and gray, or custom colors.     D:\Sites\LocalUser\nystrom\content\0133.htm      © 2005 Nystrom