BCAB #1610 - Stairway for Service Area, Table 184.108.40.206., Article 220.127.116.11.
September 27, 2005
Re: Stairway for Service Area, Table 18.104.22.168., Article 22.214.171.124.
The subject is a residential dwelling unit where an original attic space has been altered by the inclusion of a floor and finished walls, with an opening to the living area below. This area of contention is about 20 m2 and has sloped ceilings following the slope of the building’s roofline. The headroom at the peak of the ceiling is about 1800 mm, sloping downward to about 1000 mm around the perimeter walls of finished subject area. The area incorporates the original pipes, ducts, and electrical associated with the building which were in the previous attic space. There is a spiral stair which provides access to this area, which does not comply with the rise, run, and tread depth as described in Table 126.96.36.199. for “private” or “public” stairs; but the dimensions of the stair would comply with the requirements for a service stair.
Reason for Appeal
Table 188.8.131.52. provides rise, run, and tread depth dimensions for three types of stairs, “Service”, “Private” and “Public”. Table 184.108.40.206. states; Service stairs serve only areas used as service rooms or service spaces. Article 220.127.116.11. defines service room as a room provided in a building to contain equipment associated with building services, and further defines service space as space provided in a building to facilitate or conceal the installation of building service facilities such as chutes, ducts, pipes, shafts or wires.
The appellant considers the subject area to be a service space and that the spiral stairs accessing the area need only comply with the requirements for service stairs. The area is not intended to be living space or habitable area, but is intended to accommodate additional electrical and computer cabling and two permanent compressors to power air tools located in the living area below.
Building Official's Position
The Building Official does not consider the area to be a service room because the appellant is indicating the area will house equipment not related to building services.
Notwithstanding, if the area is considered to be a service area, the Building Official considers that the spiral stairs must comply with the requirements for Curved Stairs not in Exits.
Appeal Board Decision #1610
The appellant has indicated in his submission that the area will be used solely as a service space. Based on this premise, it is the determination of the Board that the requirements for service stair type in Table 18.104.22.168. apply. Further, it is the determination of the Board that Sentence 22.214.171.124.(1) “Curved Stairs not in Exits” is not intended to apply to service stairs. Therefore, the spiral stair to this service area is acceptable.
George Humphrey, Chair