Article 123Supplement v1, p. 123

COMMERCIAL LAWS SUPPLEMENT

load served. The required width of exit courts or exit

passageway shall be unobstructed except as permitted in

corridors. At any point where the width of an exit court is

reduced from any cause, the reduction in width shall be

affected gradually by a guardrail at least 900 millimeters

in height. The guardrail shall make an angle of not more

than 30 degrees with the axis of the exit court.

(2) Slope — The slope of exit courts shall not exceed 1 in 10.

The slope of exit passageway shall not exceed 1 in 8.

(3) Number of Exits — Every exit court shall be provided

with exits as required in this Code.

(4) Openings — All openings into an exit court less than

3.00 meters wide shall be protected by fire assemblies

having

not

less

than

three-fourth hour fire-resistive

rating. Except, that openings more than 3.00 meters

above the floor of the exit court may be unprotected.

(k)

Exit

Signs

and

Illuminations

—

Exits

shall

be

illuminated at any time the building is occupied with

light having an intensity of not less than 10.7 lux at floor

level: Except, that for Group A Occupancies, the exit

illumination shall be provided with separate circuits or

separated sources of power (but not necessarily separate

from exit signs when these are required for exit signs

illumination).

(1) Aisles — Every portion of every building in which are

installed seats, tables, merchandise, equipment, or similar

materials shall be provided with aisles leading to an exit.

(1) Width — Every aisles shall be not less than 800

millimeters wide if serving only one side, and not less

than 1 meter wide if serving both sides. Such minimum

width shall be measured at the point farthest from an

exit, cross aisle, or foyer and shall be increased by 30

millimeters for every meters in length towards the exit,

cross aisle or foyer.

(2) Exit Distance — In areas occupied by seats and in

Groups H and I Occupancies without seats, the line travel

to an exit door by an aisle shall be not more than 45.00

meters. With standard spacing, as specified in this Code,

aisles shall be so located that there will be not more than

seven seats between the wall and an aisle and not more

than fourteen seats between aisles. The number of seats

between aisle may be increased to 30 where exit doors

are provided along each side aisle of the row of seats at

the rate of one pair of exit doors for every five rows of

seats, provided further that the distance between seats

back to back is at least one meter. Such exit doors shall

provide a minimum clear width of 1.70 meters.

(3) Cross Aisles — Aisles shall terminate in a cross aisle,

foyer, or exit. The width of the cross aisle shall be not less

than the sum of the required width of the widest aisle

plus fifty percent of the total required width of the

remaining aisle leading thereto. In Groups C, H and E

Occupancies, aisle shall not be provided a dead end

greater than 6.00 meters in length.

(4) Vomitories —Vomitories connecting the foyer or main

exit with the cross aisles shall have a total width not less

than the sum of the required width of the widest aisles

leading thereto plus fifty percent of the total required

width of the remaining aisles leading thereto.

(5) Slope — The slope portion of aisle shall not exceed a

fall 1 in 8.

(m) Seats — (1) Seat Spacing — With standard seating, the

spacing of rows of seats from back-to-back shall not less

than

840

millimeters.

With

continental

seating, the

spacing of rows of unoccupied seat shall provide a clear

width measured horizontally, as follows: 450 millimeters

clear for rows of 18 seats or less; 500 millimeters clear for

rows of 35 seats or less; 525 millimeters clear for rows of 45

seats or less; and 550 millimeters clear for rows of 46 seats

or more.

(2) Width — The width if any seat be not less than 450

millimeters.

(n) Reviewing Stands, Grandstands, and Bleachers .— (1)

Height of Stands — Stands made of combustible framing

shall be limited to 11 rows or 2.70 meters in height.

(2) Design Requirements — the minimum unit live load

for reviewing stands, grandstands, and bleachers shall be

500 kilograms per square meter of horizontal projection

for the structure as a whole. Seat and footboards shall be

180 kilograms per linear meter. The sway force, applied to

seats, shall be 35 kilograms per linear meter parallel to the

seats and 15 kilograms per linear meter perpendicular to

the

seats.

Sway

forces

need

not

to

be

applied

simultaneously with other lateral forces.

(3) Spacing Seats — (3.1) Row spacing — The minimum

spacing of rows of seats measured from back-to-back

shall be: 600 millimeters for seats without backrests in

open air stands; 750 millimeters for seats with backrests,

and 850 millimeters for chair seating.

There shall be a space of not less than 300 millimeters

between the back of each seat and the front of the seat

immediately behind it.

(3.2) Rise Between Rows — The maximum rise from one

row of seats to the next shall not exceed 400 millimeters.

(3.3) Seating Capacity — For determining the seating

capacity of a stand the width of any seat shall not be less

than 450 millimeters nor more than 480 millimeters.

(3.4) Number of Seats Between Aisles — the number of

seats between any seat and an aisle shall not be greater

than 15 for open air stands with seats without backrests in

buildings.

(4) Aisles — (4.1) Aisles Required — Aisles shall be provided

in all stands: except, that aisles may be omitted when all

the

following

conditions

exists;

Seats

are

without

backrests; the rise from row to row does not exceed 300

millimeters per row; the number of rows does not exceed

11 in height; the top seating board is not over 3.00 meters

above grade; and the first seating board is not more than

500 millimeters above grade.

(4.2) Obstructions — obstruction shall be placed in the

required width of any aisle or exitway.

(4.3) Stairs Required — When an aisle is elevated more

than 200 millimeters above grade, the aisle shall be

provided with a stairway or ramp whose width is not less

than the width of the aisle.

(4.4) Dead End — No vertical aisle shall have a dead end

more than 16 rows in depth regardless of the number of

exits required.

(4.5) Width — Aisles shall have a minimum width of 1.10

meters.

(5) Stairs and Ramps — The requirements in this Code

shall apply to all stairs and ramps except for portions that

pass through the seating area.

(5.1) Stair Rise and Run — The maximum rise of treads

shall not exceed 200 millimeters and the minimum width

of the run shall be 280 millimeters. The maximum

variation in the width of treads in any one flight shall not

be more than 5 millimeters and the maximum variation

in one height of two adjacent rises shall not exceed 5

millimeters.

(5.2) Ramp Slope — The slope of a ramp shall not exceed 1

in 8. Ramps shall be roughened or shall be of approved

nonslip material.

(5.3) Handrails — A ramp with a slope exceeding 1 in 10

shall have handrails. Stairs for stands shall have handrails.

Handrails shall conform to the requirements of this Code.

(6) Guardrails — (6.1) Guardrails shall be required in all

locations where the top of a seat plank is more than 1.20

meters above the grade and at the front of stands

elevated more than 600 millimeters above grade. Where

only sections of stands are used, guardrails shall be

provided as required in this Code.

(6.2) Railings shall be 1.10 meters above the rear of a seat

plank or 1.10 meters above the rear of the steps in the aisle

© Compiled by RGL

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