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SR4 security shutters

Terror Screen SR4 - LPS1175

SR4 security shutters - British manufactured security roller shutters

Security Rating 4 is classified as high commercial risk and medium government risk. SR4 optimum weight and strength combination the twin skin steel lath is re-enforced by aluminium sub structure highly resistant to cutting.

Our highest rated security shutter, SR4 security shutters provide a high security weight and strength combination through the twin skin steel lath, re-enforced by an aluminium substructure which is highly resistant to cutting.

SR4 security shutters are tested to withstand 20 minutes of attack, including 10 minutes with drills and hand tools.  They are also tested and provide resistance to tools in Category A, B & C (as specified for SR3) plus D (below). The tools of this category is for experienced attempts at forced entry.

Attack time:

Tested to withstand 20 minutes of attack, including 10 minutes with drills and hand tools. The maximum test duration is 30 minutes.

Tools category A, B, C PLUS D:

“A-tool” lock puller, battery, bolt cutters, drill bits, felling/fire axe , general purpose saw/hole saw, grinder, hooligan bar, jigsaw, “K-tool” lock remover, plate shears, sledgehammer.

Steel wedges, Tube 75mm diameter x 500mm long.

Lock/hardware standard:

BS EN 1303 class 4.


Reinforced brickwork/blockwork, reinforced concrete or structural steelwork.

If you’d like to speak to us about how we can help you solve logistical challenges with a completely tailored SR4 security shutter, please contact us today on +44 (0) 191 214 0404.

Size options

  • Up to 9m high
  • Up to 9m wide

Speed options

  • Standard opening – 0.15m sec
  • Standard closing – 0.15m sec

Colour options

Optional plastisol coating on the laths and optional powder coating of guides and bottom rail and any other associated parts Standard RAL colours.

Features & benefits of SR4 security shutters

  • Attack prevention
  • Security performance
  • Asset protection
  • Public safety
  • Unauthorised access restriction
  • Insurance compliance
  • Reduced risk of crime

Design options for Hart SR4 security shutters

  • Size: custom- size up to 9000 mm
  • Various locking options available, from simple pin locking to fully automatic operation
  • Choice of colours and finish
  • Lock status signal options
  • Hood covers
  • Choice of operators
  • Infills and flashings

Applications of SR4 security shutters

  • Banks
  • Military installations
  • Government buildings
  • Museums
  • Nuclear facilities
  • Detention centres
  • Prisons
  • Chemical industries
  • Airports
  • Data centres
  • Hazardous environments
  • Security risk control buildings
  • Warehouses
Speedor Storm high speed external doors

Discuss the best product for your requirements

Contact us

Together we can help you choose the best industrial door solution for your premises.

Don’t just take our word for it…

Hart Doors offer you

1 year warranty

1 year warranty as standard

ce / ukca mark


uk design and manufacture

UK design and manufacture

LPCB approved


Security shutters case studies


Hart has supplied hundreds of industrial doors for infrastructure projects both across the UK and internationally.


Yorkshire Water

Security shutters for water company Yorkshire Water

Hart supplied electric roller shutters, SR3 security shutters and pedestrian doors to Yorkshire Water as part of a project to secure the site.


Baldovie EfW CHP

Hart supplied 7 Insulated Roller Shutters and 1 external High Speed Door to Baldovie EFW CHP

Hart supplied seven insulated roller shutters and one high speed external door to Baldovie EfW CHP, an energy-from-waste site in Dundee.


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