Last week I posted an exercise to help you apply some of your code knowledge by answering questions about swimming pool egress. Cheers to the few brave readers who gave it a shot!
Spoiler Alert: If you want to look at the original post rather than skipping right to the answers, it is here.
The assignment was to answer the questions below, regarding the swimming pool enclosure in the upper right corner of this image:
- The room where the pool is located measures 60 feet x 127 feet.
- The pool measures 48 feet x 95 feet.
- No egress routes from other spaces pass through the pool area.
- The building is equipped throughout with an automatic fire sprinkler system and an emergency voice alarm/communication system.
- The facility is classified as Use Group A – Assembly.
- The adopted code is the 2021 edition of the International Building Code (IBC).
Each question is linked to an article with more information:
To calculate the occupant load of a room or space, you take the area and divide by an occupant load factor. The IBC lists these factors in the table to the right. The factor for swimming pools (and skating rinks) is 50 square feet per person, and the factor for the pool deck is 15 square feet per person.
The area of the pool is 4,560 square feet (48 feet x 95 feet), and the occupant load of the pool is 92 people (4,560 square feet / 50 square feet per person – I rounded 91.2 up to 92).
The area of the pool deck is 3,060 square feet ((60 feet x 127 feet)-4560 square feet), and the occupant load of the pool deck is 204 people (3,060 square feet / 15 square feet per person).
The total occupant load of the space is 296 people (92 people + 204 people).
To calculate the required egress width of the doors serving the pool area, take the occupant load and multiply by the egress capacity factor. For this building, the egress capacity factor is 0.15 inches of egress width per person.
The amount of egress width required for this space is 44.4 inches (296 people x 0.15 inches/person).
A room with an occupant load of 296 people would require 2 exits, and based on the required egress width of 44.4 inches, each exit could be a single door.
Yes – the IBC requires doors that are serving an occupant load of more than 49 people to swing in the direction of egress (doors serving high hazard occupancies with any occupant load must also be outswinging).
This area would be considered an assembly occupancy, and the IBC requires educational and assembly occupancies with an occupant load of 50 people or more to have panic hardware – if the door is equipped with a lock or latch. The doors serving the pool should have a lock or latch, so the doors would require panic hardware, or fire exit hardware for doors that are fire rated.
E) The exterior egress doors serving the pool are self-closing, self-latching, and locked at all times to limit access from the exterior and allow only authorized personnel with a key to enter. What is the allowable mounting height range for the operable hardware?
If the doors are locked on the outside and can not be left unlocked, the allowable mounting height for the operable hardware is 34-48 inches above the floor. If there are interior doors serving the pool that are able to be left unlocked, the hardware on the access/ingress side of the door would be installed 52-54 inches AFF.