Welcome to Security Doors and Windows
These doors fully comply and are made with these instruction in mind:
BAL 40 Rating
Drifting Ember Safe
40.2kW/m2 Heat Flux Tested
10-10 Rule Achieved
The main purpose of such doors is to provide protection as well as a safe way for an emergency evacuation. The strength of these doors are variable at various points. They are specifically designed to never restrict or hinder any type of emergency rush. They are usually never installed on the forefront of the site. Instead the buildings have them installed on the backside, or any lesser used part.
When operated, they stay opened and no need for any additional locks either.