4 states, "At least a person accessible route shall link each obtainable level, including mezzanines, in multilivel properties and services" with Exception 1 reading, "An obtainable route just isn't necessary to stories and mezzanines that have an aggregate location of not more than 3,000sf and can be found over and https://landenaczax.ampblogs.com/details-fiction-and-pallet-gates-uk-75146993