Section 63(8) in Assam Notified Urban Areas (Other than Guwahati) Building Rules, 2014
(8)All buildings which are more than 15 m in height and all buildings used as educational, assembly, institutional, industrial store and hazardous occupancies and mixed occupancies having area more than 500 sq.m. on every floor shall have minimum two staircases. At least one of them shall be on external wall of buildings and shall open directly to the exterior / interior open space as to an area of safety. The provision or otherwise of alternative staircase shall be subject to the requirement of travel distance being complied with.
