Emergency shelter and bunker doors.

The door is designed for a blast overpressure of at least 10 psi (69 kPa) without permanent deformation, and to remain latched, operable and structurally intact after the design event, so people can get in and out of the shelter. Higher ratings, to US or European standards, are available on request.

Designed in accordance with TM5-1300 and UFC 3-340-02, the United States Department of Defense method for structures that resist the effects of accidental explosions.

Each door is made from ASTM A36 structural steel plate, stiffened with square hollow sections. This steel is chosen for its ductility, which lets it absorb blast energy without brittle failure.

The complete assembly is supplied primed and painted to the approved colour, ready to fix into prepared concrete openings with stainless steel anchor bolts. Brackets are slotted to take up site tolerances.

The doors are manufactured in our partner's factory, in partnership with British Aluminium. Welding follows AWS D1.1 and D1.3 with qualified procedures (WPS and PQR), each assembly is inspected before dispatch, and material test certificates for the structural steel are available on request.

The standard door is a single leaf of 850 × 1,600 mm nominal. Other sizes, finishes and fixing details are designed for the shelter and the project’s blast requirement.

Emergency shelters and bunkers at oil and gas sites, defence and government facilities, and other sites where a protected refuge is required.