Two Exits in a Banquet Hall: Remoteness, Capacity, and What Counts as an Exit
A 4,500 sq ft banquet room on the ground floor of a sprinklered four-story hotel is being renovated. The occupant load is calculated at 15 sq ft per person, giving 300 occupants. The room has two ways out: a single 36 in. door in the north wall and a pair of 36 in. leaves (72 in. clear) in the south wall. Measured along the line of travel, the two openings are 26 ft apart. The room diagonal is 108 ft. The north door opens into a 20 ft wide prefunction lobby shared with the hotel's meeting rooms; the lobby leads to the main entrance vestibule. The south doors open directly to a courtyard at grade. The designer shows the prefunction lobby as an exit and measures exit access travel as 180 ft, taken to the north door. No panic hardware is shown on the south pair, and the north door has a knob.
1. Can both doors be counted as separate exits for capacity purposes? Show the calculation.
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Step 1 - Apply the remoteness rule. Where two exits are required, they must be arranged so that the distance between them, measured along the line of travel, is not less than one-half the diagonal of the space (one-third where the space is sprinklered).
Diagonal = 108 ft. Half = 54 ft; one-third (sprinklered) = 36 ft.
Measured separation along the line of travel = 26 ft.
Step 2 - Conclusion on remoteness. 26 ft is less than both 36 ft and 54 ft, so the two openings are not remotely located. They function as a single exit for capacity purposes; a fire or blocked aisle in that corner can take both.
Step 3 - Test capacity. Egress capacity required = 300 x 0.2 in. per person = 60 in. of clear width, ignoring the stair/level distinction since this is all on grade. If both doors counted, 36 + 72 = 108 in. would be ample. Counting only the north door: 36 in. / 0.2 = 180 persons, well short of 300.
Step 4 - What to require. Relocate one opening (typically the north door, moved along the north or west wall) so the travel-path separation exceeds 36 ft, or add a third remote exit. Recheck that each exit's capacity is sufficient once the geometry is corrected, and confirm the door leaf swings in the direction of egress for an occupant load over 50.
2. Is the prefunction lobby legitimately treated as an exit for travel-distance purposes?
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Step 1 - Define the terms. Exit access is the path from the occupied space to an exit. An exit is the protected component - an exterior door at grade, an enclosed exit stair, an exit passageway, a horizontal exit. Travel distance is measured to the exit, not to the first door out of the room.
Step 2 - Test the lobby against the exit-passageway criteria. Is it enclosed with the required fire-resistance rating? Is it protected against fire and smoke from the spaces that open onto it, including the meeting rooms? Is it at least as wide as the required capacity of the egress it serves? On these facts, a shared prefunction lobby open to other assembly spaces is exit access, not an exit.
Step 3 - Recompute. Distance must be measured to the actual exit - the exterior door of the vestibule or a protected passageway - not to the north door. The 180 ft figure is invalid. Then compare the corrected distance to the limit for assembly occupancy in the applicable sprinkler condition.
Step 4 - Note a second problem. Because the lobby is exit access, its width must carry the combined occupant load of the banquet room and the meeting rooms that share it. Verify the capacity calculation for the lobby, not just the room.
Bottom line: mislabeling a lobby as an exit is one of the most common ways travel distance is understated on renovation drawings.
3. What door hardware deficiencies exist, and how would you write them up?
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Step 1 - Swinging and panic hardware. Assembly spaces above the occupant-load threshold in the adopted edition (commonly 100) require doors to swing in the direction of egress and to be equipped with panic hardware - a listed device that releases with a single operation and minimal force, without a key, special knowledge, or tight grasping. The south pair, serving an assembly room of 300, is a clear candidate.
Step 2 - The north door's knob. A knob or other non-listed hardware is not acceptable where panic hardware is required, and the door must release with one operation. Note also that a 36 in. leaf rated for a large occupant load must have clear width measured with the door open 90 degrees, which knobs and closers routinely reduce.
Step 3 - Write it to the code path. Cite the egress chapter's door provisions and the assembly occupancy chapter separately, and require the designer of record to submit hardware cut sheets for both openings. Hardware is a submittal item the reviewer should not accept as a note on a plan sheet.
Step 4 - Do not stop at hardware. Confirm the doors are not locked against egress from the inside, that the courtyard discharge leads to the public way, and that the vestibule door swings into the path of egress without reducing the required clear width.