Ballistic-Rated Buildings and Enclosures, Ground-Level or Elevated

What is a ballistic-rated building or enclosure?

A ballistic-rated building is a prefabricated booth, building or enclosure whose walls, glass, doors and roof are built to resist specific firearm threats. Protection is described by a level under UL 752, the U.S. standard for bullet-resisting equipment, from handgun threats at the lower levels to rifle threats at the higher levels.

The level is chosen from your threat assessment, and every component should carry it. A rated wall with an unrated window or door gives only the protection of the weakest part.

Ballistic buildings are part of our in-plant and industrial modular buildings range. Level-by-level detail is in our ballistic ratings guide; standard booths are on guard booths.

Elevated and tower ballistic enclosures

Perimeter security, correctional yards and training ranges often need protection and height at the same time. An elevated ballistic enclosure is a rated modular cab on a steel tower or platform, with rated glass on the sides that face the threat, a rated door to the landing and a rated floor where the threat can come from below.

The tower structure is engineered for the heavier cab, wind and seismic loads at the site. Mobile and relocatable options exist for temporary posts. See guard towers and observation towers for heights and access.

Tower height, stairs and landings

Height is set by what the officer must see: a fence line, a yard, a range or a road. Taller towers carry switchback stairs with intermediate landings and guardrail on every run, and the cab landing needs room to open a rated door outward without stepping back toward the stair.

A tower elevated ballistic rated enclosure is heavier than a standard cab, so the tower, the anchor bolts and the footing are designed together from the cab weight, wind exposure and soil data at your site.

Choosing a protection level

UL 752 levels are defined by the weapon and ammunition tested and the number of shots. In general terms:

For the exact weapons, rounds and shot counts at each level, see the ballistic ratings guide. Forced-entry resistance is a separate requirement and can be added for high-security sites.

Blast vs. ballistic: what blast ballistic enclosures require

• Different threat, different engineering. Ballistic armor stops bullets at a point. Blast loads push on the whole building at once, so the frame, connections, doors, glazing and anchorage must all be designed for the pressure.
• Blast ratings come from an analysis, not a label. Your security engineer or the facility’s blast study sets the design loads. Military blast resistant buildings follow the criteria in the project’s antiterrorism requirements.
• We do not call anything blast proof. Send the stated loads and we will tell you whether our manufacturer partner can engineer a design to meet them, with documentation.
• Process plants are their own case. Occupied buildings near refinery or chemical process units are sited under facility siting studies. See modular oilfield and energy buildings and prefabricated control buildings.

Inside a ballistic booth: ports, counters and ballistic millwork

The interior is where protection meets daily work. Officers sit and stand at counters below rated glass, pass documents through deal trays and talk through speak-through ports, so each of those points is rated to the same level as the walls.

Rated counter fronts and the wall area below transaction windows, often called ballistic millwork, protect a seated officer. Military and corrections posts may add rated firing ports. HVAC units mount through the wall behind ballistic shrouds or baffles.

Ballistic protection for control buildings and existing booths

Operators in control rooms at utilities, water plants and other critical infrastructure can be protected without turning the whole building into a vault. A common approach is rated walls and glazing on the sides that face a road, fence line or public area, and standard construction elsewhere, set by the threat assessment. Control building ballistic protection is coordinated with the room’s consoles, windows and HVAC so nothing breaks the rated envelope; see prefabricated control buildings for layout and siting.

Existing booths are harder. Adding armor means replacing panels, glass, doors and frames, and the joints between new and old parts are difficult to make reliable, so a purpose-built booth is often the cleaner answer. See a ballistic-rated guard shack example and standard options on our guard booths hub.

How a ballistic building project runs

What to send us for a quote

• Protection level from your threat assessment, and any forced-entry requirement.
• Building type: booth, gate house, enclosure or elevated cab, with size and headcount.
• Glass layout and transaction windows.
• Site: pad or tower, wind and seismic location, utilities.
• Timeline and purchasing method.

Specifying a booth or building for a plant or industrial gate? Compare prefab guard booths for plants and industrial sites and the government and military modular buildings page, and use the modular building buyer’s guide to organize the request.