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Blast Resistant

Overly is able to Provide a Wide Range of Blast- and Pressure-Resistant Door and Window Systems to meet Your specific project requirements.

Custom High Range Blast (HRB) Doors and Windows

Due to the demanding high pressure requirements for some projects, an Overly Pre-Engineered model is not always the right choice. Based on the desired structural response, pressures above 25 psi may require a Custom Design High Range (HRB) product.  Overly HRB units are custom designed on a performance specific basis and are generally made from varying thickness of monolithic steel plate.  These doors are capable of withstanding high momentary explosions and other forces such as explosion-generated fragments and remain operable after an incident.

The design of the HRB units are verified by calculations based on Unified Facilities Criteria (UFC) 3-340-02 "Structures to Resist the Effects of Accidental Explosions".  Our engineering and design staff can help custom design a product to meet your project requirements.  Contact our engineering and design group with your specific needs so that they can review and look to develop a product that meets those requirements.

Contact Engineering & Design

Pre-Engineered Blast Doors and Windows

We manufacture four types of pre-engineered blast doors. The four types are:

  • BMD (Blast Mitigation Door) 
  • MRB (Mid Range Blast)
  • LRB (Low Range Blast)
  • VLRB (Very Low Range Blast)

Blast Mitigation Door (BMD)

Series BMD is a series of doors designed and tested to meet the requirements of Unified Facilities Criteria (UFC) 4-010-01, "DOD Minimum Anti-Terrorism Standards for Buildings." This criteria requires all exterior doors to be designed in accordance with ASTM F2927-12, "Standard Test method for Door Systems Subject to Air blast Loadings"

View BMD Product DETAILS

Mid, Low, & Very Low Range Blast Door

Series MRB, LRB, and VLRB are a family of pre-engineered blast- and fire-resistant doors and frames. The doors are used for hazardous material storage, automotive, chemical, petrochemical, and pharmaceutical facilities.

View MRB Product Details

View LRB & VLRB Product Details


We offer a full line of single and pair swinging blast-resistant doors. Vision light configurations range from peep sites to dual glazed window systems. Single and bi-parting sliding door systems are also available with either manual or power controls. Tandem assemblies, as well as double egress options are available as well.

Frame Configurations

Many of our blast-resistant products use a frame profile similar to standard hollow metal frames. We manufacture frames to meet your exact need. Slip in style frames are commonly used. Mullion configurations are available. In some instances, we utilize channel iron framing members for pour-in-place wall systems.

Hardware Configurations

We typically provide a standard hardware package with our blast-resistant products. However, hardware can be supplied from a third party if the information is reviewed by our technical staff. Also, certain blast door models require modified or custom manufactured hardware. It is best to contact the factory for assistance. Factory mounting of hardware is also available. Consult your local representative for more information.

Custom Hybrid Products

Additional performance options that can be incorporated into this door include: airtight, acoustical, & UL bullet resistant requirements. Depending on the individual design criteria, all features may not be available. Consult the factory with your project specific needs to determine availability. To assist in determining hardware compatibility with Overly Blast-Resistant Doors, please contact our sales department.


Personnel doors can be manufactured up to 4'-0" x 8'-0" singles; 8'-0" x 8'-0" pairs. However, there is really no limit. We have standardized a number of oversized units or can custom design to your exact specification. Small sizes for hatches and access panels are also available, as well as blow-out panels.


Metal products receive a coat of rust inhibitive primer. Zinc-rich and other select primers are available. Finish painting may also be available. Consult your local representative for more information.

Get Started

Are you an architect, contractor, or distributor? Find your local Overly Representative to get started.

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