Division Physical and mechanical properties

Window and balcony doors locking devices must be built to withstand wear by repeated opening and closing, both loaded and unloaded, as well ageing and exposure to all weather conditions, such as sunshine, rain, snow, ice, moisture, high and low temperatures, wind and remain child protective.

The devices must be able to withstand accidental impacts during their lifetime without breaking.

To fulfil their intended purpose, the devices must limit the opening distance between the frame and the casement to a maximum distance to effectively prevent the passage of a young child, bearing in mind, in particular, the developmental abilities and anthropometric measurements of children at different ages.