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Blast Resistant & Bulletproof Buildings

Our highly durable blast resistant buildings and explosion proof structures are manufactured to all relevant standards and are thoroughly tested to ensure optimal reliability and performance. Protecting the health and well-being of employees is critical for companies in any industry; our OSHA-compliant modular structures can play a vital role in ensuring employee safety in even the most extreme environments, such as those regularly subjected to or at risk of explosions.

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Common Applications for Blast Resistant Buildings

Commercial Structures Corp. manufactures several blast resistant modular buildings solutions ideal for use in a variety of hazardous locations.

Blast resistant modules are often used in mining operations and sites, near hazardous-material handling or storage facilities, in facilities that utilize volatile or high-pressure processes, and within or near specifically designated blast zones, which are present in a number of different industries.

When working at or near locations that present blast hazards, employees are at constant risk. Your obligation to protect them extends to all aspects of their work and includes much more than just standard personnel safety training; offices, break rooms, restrooms, and every other structure in a hazardous location should be reliably explosion proof.

This applies to scenarios outside of the industry, as well. Modular shelter guard houses in any secured facility — from sensitive government buildings to prisons and utility posts — can be built with a blast resistant structure, and can be further protected through the use of bulletproof siding, as offered by Commercial Structures.

Besides protecting employee safety, companies must also establish reliable means of safeguarding sensitive, delicate, or otherwise valuable equipment. When housed in our explosion proof structures, such equipment will remain as safe as your staff.

Blast Resistance Specifications, Standards, and Testing

Our standard blast resistant buildings weigh between 1,200 and 14,000 pounds, feature ceilings between 7 and 10 feet tall, and can be made as small as 8 feet long by 8 feet wide or as large as 40 feet long by 12 feet wide. Doors and windows — including specialized transaction windows with voice ports of various shapes — can be included without reducing blast resistance. Most importantly, all our blast resistant structures are rated for blast overpressure ranging from 5 pounds per square inch (psi) to 20 psi.

To achieve these excellent blast overpressure ratings for our explosion proof structures, we manufacture them to meet some of the strictest industry standards, including:

  • MIL-STD-622F military ballistic limit standards
  • MIL-P-46593A military ballistic limit standards
  • OSHA 1910.307 Explosion Resistant Structures guidelines
    • Class 1, Groups A, B, C, D, E, F, and G
    • Class 2, Groups A, B, C, D, E, F, and G

To ensure the structural integrity of our modular explosion resistant buildings, we regularly perform a range of different tests, including live ammonium nitrate fuel explosion tests, fragment-simulating projectile (FSP) tests, and V-50 tests. During V-50 testing, our blast resistant buildings are fired upon at increasing velocity until projectiles are blocked (or not blocked) at a 50-50 ratio, thus determining the maximum limit of protection.

To find out more about blast resistant buildings and explosion proof structures from Commercial Structures, review our specifications table below, or contact us to speak with one of our representatives.

Specifications Table

Capabilities Assembly, Delivery, Design and Engineer, Fabrication, Inspection, Installation
Applications Access Control Booths, Battery Charging Enclosures, Guard Booths, Modular Detention Facilities
Blast Resistant Construction Materials Bulletproof Steel, Fiberglass
Blast Overpressure 5 psi to 20 psi
Modular Building Weight 1,200 lbs to 14,000 lbs
Ceiling Height 7′ to 10′
Standard Sizes Length: 8′ to 40’Width: 8′ to 12′
Maximum Modular Structure Size 40′ x 40′
Standard Window Size 46″ x 27″
Standard Door Size 36″ x 80″
Testing Capabilities FSP Test, V50 Test
Interior Wall Coverings Beige, Calcutta Gray, Calcutta Tan
Standard Interior Floor Coverings Ebony, Nutmeg, Sesame
Transaction Window Features Arched Voice Ports, Circular Voice Ports, Horizontal Voice Ports, Rectangular Voice Ports, Vertical Voice Ports
Finishes Aluminum, Fiberglass Reinforced Plastic (FRP), Painted Steel, PVC, Vinyl
Lead Time 3 to 4 weeks from the time of order.
Standards Meet ballistic limits under MIL-STD-622F and MIL-P-46593A military standards.
Explosion Resistant Structures are available in Class Division 1 & 2, Groups A, B, C, D, E, F, and G.
Built to uniform building code specifications (Can build to specific code requirements upon request.)
All electrical components are UL listed & all wiring is per National Electric Code (latest edition).
Buildings comply with the applicable rules of the Indiana Fire Prevention and Building Safety Commission IC 22-15-4-2.
Industries Served Automotive, Distribution Centers, Energy, Government
Buildings, Manufacturing, Medical/Dental, Military, Mining, Oil
Drilling, Others, Prisons/Correction Facilities, Private/Public
Schools, Recycling, Restaurants, Steel Mills, Universities

Standard Specifications

Standard Features 1/8″ Industrial Floor Tile, Complete Floor and Roof System, Diffused Lighting, Heavy Duty Vinyl Wall Covering, Interior Receptacles, More
Standard Options Acoustical Accordion Doors, Exhaust Fans, Heating and Air Conditioning, Hydraulic Door Closers, Sprinklers, Steel Doors, And More
Perimeter Frame Perimeter tubular 2″ x 6″ frame members (13 ga.) with structural steel “C” channel 2″ x 8″ set perpendicular to and inletted into side tubular bars. Channel is utilized as forkliftable slots for handling. All frame parts are coated with corrosive resistant (black) paint.
Metal Weather Shield Galvanized steel construction. The shield covers the entire floor assembly and is located between frame and underside of floor joists.
Floor Joists Joists are nominal 2 x 4 (1 1/2″ x 3 1/2″) spaced in a lateral configuration, 12″ O.C. Lumber is #2 SPF or better.
Floor Insulation Fiberglass batt-type insulation between floor joists is R-11 and entirely fills any and all voids.
Floor Decking 3/4″ thick A.P.A rated plywood is fastened securely to floor joists with glue and ring shank nails (spaced approximately 4″ O.C.). All seams are sanded smooth and filled as necessary.
Floor Covering Vinyl composition floor tile 1/8″ thick 12″ x 12″ squares are laid on the floor utilizing waterproof tile adhesive. Pattern full depth of tile.
Wall Studs Studs are nominal 2 x 4 (1 1/2″ x 3 1/2″) space 16″ O.C. Lumber is S.P.F. stud grade or better. Top plate is nominal 2 x 4 (1 1/2″ x 3 1/2″) fastened securely to studs. Bottom plate is nominal 2 x 4 (1 1/2″ x 3 1/2″) fastened securely to studs.
Wall Insulation Fiberglass batt-type insulation between studs is R-11 and entirely fills any and all voids. Total R-value is R-14 with sheathing.
Interior Wall Covering 1/2″ thick gypsum board with laminated vinyl covering is fastened to the inside of the studs with wide crown staples and gypsum adhesive; material has a class ‘A’ flame spread rating. 4″ vinyl base cover.
Exterior Sheathing Under steel siding structural sheathing is secured to entire exterior, per manufacturer’s recommendations. Sheathing is 1/8” structural thermo-ply.
Roof Framing Rafters are nominal 2 x 4 (1 1/2″ x 3 1/2″) spaced in lateral configuration 16″ O.C. Lumber is #2 SPF or better.
Interior Ceiling Ceiling material is 1/2″ gypsum with a white stucco pre-finish fastened securely to roof rafters with wide crown staples and screws. Material has a class ‘A’ flame spread rating.
Roof Insulation Fiberglass batt-type insulation between roof rafters is R-11 and entirely fills any and all voids.
Exterior Roof Sheathing The top side of the rafters has 7/16″ sheathing fastened to roof rafters. Covered completely with a 4 mil. Polyvinyl vapor barrier.
Roof Covering 30 ga. Galvanized steel construction. Roof metal covers entire roof assembly.
Exterior Siding Galvanized steel siding is 29 ga. Pre-finished (on both sides) commercial type with appropriate top and bottom trim fastener securely to studs. Seven standard colors are available. 40-year guarantee.
Windows Windows are fixed glass (picture) type, double insulated glazing with vinyl extrusion around the perimeter. Windows are secured in place and sealed with a silicone-based sealant. Glazing is double 1/8″. Sliding windows are optional.
Exterior Doors Doors are a sandwich type construction with 0.019 aluminum on both faces and an interior core of foam and wood perimeter. A welded aluminum extrusion surrounds the assembly. This assembly is in turn pre-hung in an aluminum frame equipped with heavy-duty metal hinges. Door lite is fixed tempered glass single pane. Heavy-duty door closure included.
Full Depth Fork Pockets All sizes 2 1/2″ x 8″ structural ‘C’ channel (3 1/2″ x 7″ opening).
Interior Light Fixtures All light fixtures are 4′-0″ (four foot) T8 twin tube with an acrylic wrap-around type diffuser cover.
Interior Ceiling Height The dimension from the finished floor surface to the finished ceiling surface is 7′-0″ (seven foot). 8′ optional with 2 x 4 wall studs and R-11 insulation. Total R-value is R-14 with sheathing.
Electrical Service Panel Pre-wire service entrance panel is equipped with a 60-amp main breaker, a 15-amp breaker (for lights), an additional 20-amp breaker (for receptacles), and any additional breakers necessary. Entrance conduit is through the exterior wall for ease of hook-up. All electric components UL listed and wired to National Electrical Code. Standard service is 240/120V, single-phase, 60 cycles.

Durability and Weather Resistant Features

Rain and Moisture Protection Options All Speed Space buildings are designed for inside or outside use. Galvanized steel roof and under floor sheathing, double insulated glass windows, vapor barrier, moisture-proof sheathing assures excellent humidity control.
Wind, Cold, and Heat Insulation Options Steel siding, structural thermal sheathing, full 3 1/2″ insulation and thermal windows guarantee comfortable temperatures, even in the most severe weather.
Fire Resistant Options Steel siding, roof and under floor sheathing, as well as gypsum interior, give Speed Space buildings a class ‘A’ flame spread rating on all surfaces. Sprinkler systems and totally non-combustible units available.
Noise Control Options Structural sheathing, gypsum interior, and thermal windows create a decibel drop in the 25 to 30 decibel range, standard with windows and doors. For extreme conditions, optional sound control is available (triple-glazed windows, soundboard, and carpeting).
Damage Protection Options Exterior steel siding with baked finish on both sides (40-year guarantee), structural sheathing, 1/8″ industrial floor tile, heavy-duty vinyl interior walls, and a 4″ rubber base molding all help to control accidental or deliberate damage. Doors are heavy-duty with kick plate, lite, and closure.
Floor Insulation Fiberglass batt-type insulation between floor joists is R-11 and entirely fills any and all voids.

The Century Series Modular Building

Features Available in All of Our Same Great Color Selections, Crisp Clean Lines, Durable clad aluminum construction with high density polypropylene core, Excellent Thermal Stability, Light Weight and Water Resistant, Low Profile Trim Packages, No Exposed Fasteners, Sharp Details, Smooth exterior siding