Lietzke Security 1 Doors


The Security 1 Door provides extra strength and durability in either a Squareline or Rebate Edge Door configuration. The door is comprised of a Square Hollow Section (SHS) steel sub-frame with a rigid polystyrene or exterior grade marine plywood core and sheeted in pre-painted Colorbond steel. The SHS steel sub-frame enhances the strength and security of the door. The Security 1 door is available in a 40mm and 50mm door thickness. Most locking devices and hardware can be factory fitted to Security 1 Doors. All Security 1 Doors are available in Double Door configurations.


Perimeter security doors, internal security doors, sports and amenities buildings, isolated sites, document and archive security, warehouse personnel access door, plant rooms


Standard finish is pre-painted Colorbond steel. Also available in Zincalume or Galvabond. Factory applied durable polyester powedercoat finish is suitable for Security 1 Squareline Assemblies only.


Standard Door Size – 2040mm high × 820, 870 and 920mm wide × 40mm
Standard Double Door Size – 2040mm high × 1640mm wide × 40mm
Other Sizes up to 3600mm high × 1039mm wide × 50mm available

Standard 40mm Thick Door – 38mm × 38mm × 1.6mm SHS galvanised steel

Core Material:
Rigid Polystyrene
Optional Exterior grade marine plywood also available

Security 1 Squareline Door supplied with Lietzke Heavy Duty Hinges.
Security 1 Rebate Edge Door supplied with pre-fitted heavy duty steel hinges with nylon bushes.

Most locking devices and hardware can be factory fitted to Security One Doors

Edge Style:
Available with an anti-jemmy edge for additional security

Door Weight:
40mm Std Squareline Security 1 – 30.00kgs
40mm Std Rebate Edge Security 1 – 31.00kgs

Suitable Frames for Door and Frame Package

Frames can be customised to suit specific applications. For transportable buildings use flange fit and for Architectural applications use a BW Style frame to suit the required wall thickness.

To Specify

Door shall be a Lietzke Security One Squareline (or Rebate Edge Door)* comprising a steel SHS perimeter sub-frame and a solid polystyrene (or exterior grade marine ply)* core sheeted with pre-painted Colorbond steel and a Squareline (or Rebate)* Edge treatment. The door shall be pre-hung in a Lietzke Flange Fit Frame (or BW Metal Door Frame or Custom Lietzke door frame to suit)* and pre-fitted with the locks and hardware as specified.

* Nominate when specifying.

Technical Drawings: