N.Y.C. Admin. Code § 27-541: § 27-541 Exit signs.

Signs meeting the requirements of subchapter six of this chapter and subdivision (e) of section 27-534 of this article shall be provided in all assembly spaces to indicate the location of exits and, where necessary, the direction to the exits. All exit or directional signs shall be placed so that they are clearly visible from all parts of the assembly spaces, and the bottom of all signs shall be at least seven feet above floor level. Signs shall be of the internally lighted type in all assembly spaces where the general illumination is reduced to less than five foot candles during a performance or during occupancy. Signs shall be lighted at all times during occupancy.

TABLE 8-1 Determination of Exit and Access Requirements

Occupancy Group Classification

Maximum Travel Distance Within Assembly Space (ft.) a

Capacity (number of persons per unit of width)

Ramps Corridors, Safe Areas, Exit Passageways

Primary

Secondary

Aisle and Cross Aisle e

Doors or Openings

Stairs and Escalators

From Assembly Space

From Safe Area

F-1a b

85

125

80

50

100

60

80

F-1b c

100

125

90

80

125

80

100

F-2

175

250

400

400

500

320

425

F-3

100 d 

125 d 

90

80

125

80

100

F-4

85 d 

125 d 

80

50

100

60

80

Notes for Table 8-1:

a See section 27-533. When an exit opening from an assembly space discharges into corridor that does not meet the requirements of this code for a safe area, the travel distance shall include the distance within the corridor to an exit.

b See paragraph four of subdivision (b) of section 27-546 for stages.

c See paragraph three of subdivision (b) of section 27-547 for stages.

d In places of assembly completely equipped with automatic sprinklers, this distance may be increased fifty percent.

e See section 27-532.