Bs9999 Section 4.2 The guidance on means of escape in Section 5 permits variations to be made to travel distances and door and/or stair widths on the basis that the level of risk can be reduced by the provision of additional fire protection measures. Such measures include an increased level of management of fire safety, the provision of an automatic sprinkler system, the provision of a smoke management system or the provision of an additional level of automatic fire detection. Equally, the guidance on designing the building structure in Section 7 permits certain variations when such measures as an automatic sprinkler system are provided.

I am doing a thesis on pressure differential system. Can you make variations to minimum standards when a PDS is installed, do you also need a sprinkler system. The above statement is the only reference to the smoke management system being used to allow variations later on in bs 9999 it dosent mention it being used to allow variations to minimum standards.

If anyone has any information regarding this i would greatly appriciate any help.