NEN EN 13724 : 2013 C1 2016

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
  4.1 Aperture types
  4.2 Aperture sizes
  4.3 Corrosion resistance
  4.4 Security
5 Requirements
  5.1 Components
  5.2 Dimensions
      5.2.1 Smaller apertures - Types 1, 2 and 3
      5.2.2 Gauge mail
  5.3 Ergonomics and safety
      5.3.1 Installation height of the aperture
      5.3.2 Safety
      5.3.3 Opening force of the flap
      5.3.4 Closing of the flap
      5.3.5 Fire protection regulations
  5.4 Confidentiality
  5.5 Corrosion and water penetration
      5.5.1 Corrosion
      5.5.2 Water penetration (types 1, 3 and 4)
  5.6 Security
      5.6.1 Theft prevention - types 1, 2 and 3
      5.6.2 Theft prevention - type 4
      5.6.3 Security and locks - types 1, 2 and 3
      5.6.4 Protection against the opening of doors
            and windows - type 4
      5.6.5 Security - type 4
6 Tests
  6.1 Components
  6.2 Dimensions
  6.3 Ergonomics and safety
      6.3.1 Installation height of the aperture
      6.3.2 Safety
      6.3.3 Opening force of the flap
      6.3.4 Closing of the flap
  6.4 Confidentiality
  6.5 Corrosion and water penetration
      6.5.1 Corrosion
      6.5.2 Water penetration
  6.6 Security
      6.6.1 Theft prevention - types 1, 2 and 3
      6.6.2 Theft prevention - type 4
      6.6.3 Security and locks - types 1, 2 and 3
      6.6.4 Protection against the opening of doors
            and windows - type 4
      6.6.5 Security - type 4
7 Marking and labelling
Annex A (normative) Dimensions
Annex B (informative) A-deviations

Specifies the requirements and test methods of the apertures for the delivery of letter post items when fitted in accordance with the manufacturers instructions.