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Maximum Security Louvers provide DOS certified protection against mob-level forced-entry attacks and rifle-level ballistic threats in applications where buildings require airflow for equipment and occupants. A unique chevron slat design offers extraordinary protection against firearm assaults and exceptional rain shedding capabilities.


Design Features

Tested to Department of State Standard SD-STD-01.01 Rev. G (Amended), Ross Maximum Security Louvers offer the utmost in DOS certified ballistic and forced-entry resistance while providing essential ventilation for mechanical equipment used to support building operations. Certified to withstand a simulated “mob” attack for 60 minutes and 5.56 M193, 5.56 M855 and 7.62 M80 ballistic rounds, these louvers are designed to provide the ultimate in protection. Optional screening is available to impede pest infiltration.

The modular structural steel construction lends to conjoining single units together to form large louver walls without sacrificing the security rating. Small sizes are available for ductwork applications. Available in over 200 colors and with stainless steel or aluminum trim, they are also capable of meeting architectural design requirements.

Fabricated as a complete system, typical construction includes a structural steel louver frame, louver panel insert, ballistic protection bars, trim or cladding and a plate or tube-type sub-frame.

Ross Maximum Security Louvers offer architects and end users:

  • Anti-Terrorism Level Security – where conformance to U.S. Department of State forced-entry / ballistic resistant threat levels is required
  • Design Flexibility – numerous cladding and trim options offer the ability to complement other building materials
  • Durability – structural steel materials and high-quality finishes provide extreme durability and low maintenance throughout the life cycle


Maximum Security Louvers safeguard equipment rooms for generators, switching gear, transformers and other utilities in prominent and mission critical buildings or anywhere the highest levels of protection, aesthetics and ventilation are important considerations.

Ross Technology has manufactured thousands of louver systems. Our customers include some of the largest government agencies, general contractors, integrators and corporations in the world. You will find our products in a broad range of industries including:

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Technical Data

The uniqueness of Ross Maximum Security Louvers can be seen in their simple, efficient design. Structural steel “T” or “L” frames combine with chevron-style inserts to create a very effective method of shielding against bullets and shedding rain. Widely accepted as the basis of design on many projects, Ross has manufactured thousands of units for a wide variety of applications.

Factory welded to simplify installation in the field, modules are constructed in sizes up to 4’x10’ (1.22m x 3.05m). Louver modules can be ganged together to create an even larger louver wall.

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