Observation Buildings
Observation Post/Checkpoint
Components
Each Safe Zone Ballistics Observation Post/Checkpoint Unit consists of:
- 1 No. Blast Door or Floor Hatch;
- 3 or 4 Sided Opening Windows;
- Air handling Unit;
- Electrical Trunking;
- Fixtures and Fittings to Suit.
View photographs of the Observation Post/Checkpoint components.
Manufacture & Assembly
Each unit is made from a double-skinned steel plate construction, with window and
door inserts. The cavity is filled with concrete and sealed top and bottom to provide
continuity of protection. The window inserts are designed to resist the blast and
ballistic threat as required by the client. Windows are available both fixed and open
able depending on the operational use of the unit. For ground mounted applications a
blast door is fitted on one side for access, however in an elevated situation a floor
mounted hatch is installed.
Security Performance
The Observation Posts have been tested against the following:
- 7.62 x 51 Assault rifle;
- Barret light 50;
Hardened Structure
Components:
Each Safe Zone Ballistics Hardened Structure consists of:
- Entrance Porches with Blast Doors;
- Service/Access Corridors;
- Open Plan Office Space;
- Kitchen Facilities;
- Toilet/Shower Facilities.
View photographs of the Hardened Structure.
Manufacturing & Assembly
Following clearing of a site, a concrete structural foundation is poured in-situ
complete with bolt boxes for steelwork. A steel sub-frame is erected and 300mm thick
reinforced concrete wall, floor and roof panels are bolted into position. At ground
level a reinforced concrete “bern” is located to provide additional protection against
van/car bombs. Entrance doors are located at the gables ends of each building to
provide entry/access via an air lock system. All buildings have a complete air
conditioning system and backup electrical supply. Each building can be finished
externally to suit the client’s architectural requirements and performance
specification.
Security Performance
The hardened accommodation structure has been extensively tested at live trials during 1993-94. The following results were achieved after testing on the structure:
- 80kg TNT (Mk 15 mortar) @ 1 meter standoff – No penetration;
- 250kg TNT (Car Bomb) @ Bern wall – No damage inside building;
- 14.5mm API range 40 metre – No penetration internally;
- 250kg ANS (Mk 13 mortar) @ 2 metre standoff – No penetration;
- 155mm L15A1 shell on contact – No penetration with 375mm deformation;
- 80kg TNT (Mk 15 mortar) @ 1 metre from external door (tested specifically on the door set).
- Outer Door destroyed, inner door remained intact with no excessive pressures recorded within the building.