PAS 24 - Secured By Design Steel Door

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Strongdor Secured by Design door-sets are certified to comply with the standards set by the National Police initiative. Aiming to improve the security of buildings and their immediate surroundings and provide safe places to live, work, shop and visit.

These SBD steel door-sets offer greater protection to bin stores, plant rooms and access to communal areas and can be used on both residential and commercial developments that require the peace of mind that comes with Secured by Design compliance.

  • Manual or Electric Locking
  • Rockwool or Honeycomb Core
  • Up to 4.5m wide with solid of glazed side panels
Unique Range Features

10-14 day lead time
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Product Features

Height Icon

Single - up to 2.24m
Double - up to 2.24m

Width Icon

Single - up to 1.3m
Double - up to 2.49m

Leaf Thickness

44mm deep leaf skin

Air permeability

EN1026:2000 to class 4 – 600Pa (113kmh) test pressure

Water tightness

EN1027:2000 to 150Pa for outward opening and 100Pa for inward

Fire resistance

Upgrade to Internal BS EN 1634:1 2008
Up to 240 minutes

Resistance to wind load

EN12211:2000 to 1200Pa (Class A3) 98 mph


Available - air flow reduced due to security design

Weather tightness

BS 6375: Part 1: 2009 (test to EN1026:2000, EN1027:2000, EN12211:2000) to 1200 exposure rating

Further information


Typical frame
Steel / galvaneal head and jambs
Minimum size 1.6 x 104 x 59mm
Single type rebate size 48 x 16mm

Door Leaf
Core 42mm thick - Rockwool or honeycomb infill
Facings - 1.2mm thick -Steel/Galvaneal
Single type rebate size 44 x 15mm
Dutch fold joints
Powder-coated finish

AM3 - Inward opening - 114 x 25mm
AM5 - Outward opening - 114 x 25mm

AM3 Threshold inward

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AM5 Threshold outward

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Glazed vision panel cross section

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Single Door Installation

Single Door Installation

This video contains detailed, step-by-step instructions for the safe installation of a Strongdor Steeldor single door-set. Please pay particular attention to the safety instructions.

Double Door Installation

Double Door Installation

This video contains detailed, step-by-step instructions for the safe installation of a Strongdor Steeldor double door-set. Please pay particular attention to the safety instructions.

Touching Up Paintwork

Touching up Paintwork

A demonstration of how to sue the touch up kit supplied with your steel door-set.

Trimming Expander Panels

Trimming the Expander Panels

Instructions on how to trim the side expander panels, for when the aperture is too tight.

Standard Colours

Standard Colours & Coatings

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Installationf 33

Door Fitting Guide

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Door Configurations

Manual & Electric SBD Steel Doors


Over 150 colours available

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