Suggest you find someone near you that has designed to USA standards and set down so they can go over a high rise design.
Based on the 2012 ibc
Means of Egress
Several changes and additions to the means of egress requirements have been introduced in the IBC for high-rise buildings. Some of these new requirements were controversial and were opposed by organizations such as the Building Owners and Managers Association (BOMA).
The most controversial requirement was an additional stairway for buildings more than 420 feet in height (IBC Section 403.5.2). For example, a building with multiple stories and an occupant load of 500 or less for each story would be required to have a minimum of two exits from each story. However, if that building exceeds 420 feet in height, then a third stairway would be required. This is to overcome the problem encountered at the WTC in 2001, when occupants were egressing down the stairs while firefighters were trying to work their way up the same stairs. Furthermore, if one exit is removed, the remaining exits must provide the total exit width calculated per Section 1005.1. This additional stairway requirement applies to all applicable high-rise buildings in all occupancy groups except for Group R-2.
The exception to the additional stairway requirement is to provide an occupant evacuation elevator per IBC Section 3008. See The Code Corner No. 38, “Elevators,” for a detailed discussion on occupant evacuation
elevators.
Also related to exit stairways is the remoteness requirement (IBC Section 403.5.1). The remoteness requirement states that interior exit stairways be separated by a distance not less than 30 feet or ¼ of the overall diagonal of the building or area to be served, whichever is less. If three or more exit stairways are provided, at least two shall comply with the remoteness requirement. If interlocking stairs are provided, the stairs will be counted as a single exit stairway.
Per IBC Section 403.5.3, doors leading into exit stairways are permitted to be locked from the stairway side, provided that all doors can be unlocked—not unlatched—simultaneously upon a signal from the fire command center, which is discussed later in this article. For stairways where doors are locked from the stairway side, a two-way communication system connected to a “constantly attended station” must be provided on the stairway side at every fifth floor.
Stairways serving high-rise buildings are required to be constructed as smokeproof enclosures per IBC Section 403.5.4, which references IBC Sections 909.20 and 1022.10. Section 1022.10 establishes the basic requirements for interior exit stairways within smokeproof enclosures. The smokeproof enclosure must be accessed through a vestibule4 unless the pressurization alternative is implemented. The smokeproof enclosure must terminate at an exit discharge or a public way; however, it can be extended using an exit passageway. To do so, the exit passageway must be separated from the smokeproof enclosure with a fire door and have no other openings other than the door to the exit discharge. Other openings are permitted into the exit passageway provided it is accessed by vestibules like the smokeproof enclosure or is pressurized in the same manner as the smokeproof enclosure. If the exit passageway is pressurized in the same manner as the smokeproof enclosure, then the fire barrier and fire door between the smokeproof enclosure and exit passageway may be eliminated. Finally, the last exception permits the smokeproof enclosure to egress through areas on the level of exit discharge per IBC Section 1027.
Another requirement specific to high-rise buildings is the use of luminous markings for the egress path per IBC Section 1024. The only occupancy groups to which this applies are A, B, E, I, M, and R-1. This section explains in great detail what needs to be marked and how. If the stairway egresses through areas on the level of exit discharge, such as a lobby, the markings are not required in those areas.
The last egress requirement for high-rise buildings is actually an exception. IBC Section 1029 requires that Group R-2 occupancies be provided with emergency escape and rescue openings for all sleeping rooms in stories below the fourth story. However, because of the added protection and safety measures required of high-rise buildings, IBC Section 403.5.6 exempts high-rise buildings from having these openings.
