Code of Massachusetts Regulations › 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS › Chapter 7 - Fire and Smoke Protection Features › Section 708 - SHAFT ENCLOSURES › Subsection 708.14 - Elevator, dumbwaiter and other hoistways

Current through Register 1525, July 5, 2024
Elevator, dumbwaiter and other hoistway enclosures shall be
				  constructed in accordance with Section 708 and Chapter 30.
708.14.1
Elevator lobby.
An
				enclosed elevator lobby shall be provided at each floor where an elevator shaft
				enclosure connects more than three
stories
. The lobby
				enclosure shall separate the elevator shaft enclosure doors from each floor by
fire partitions
. In addition to the requirements in Section
				709 for
fire partitions
, doors protecting openings in the
				elevator lobby enclosure walls shall also comply with Section 715.4.3 as
				required for
corridor
walls and penetrations of the elevator
				lobby enclosure by ducts and air transfer openings shall be protected as
				required for
corridors
in accordance with Section 716.5.4.1.
				Elevator lobbies shall have at least one
means of egress
complying with Chapter 10 and other provisions within this code.
Exceptions:
1. Enclosed elevator lobbies are not required
				at the street floor, provided the entire street floor is equipped with an
automatic sprinkler system
in accordance with Section
				903.3.1.1.
2. Elevators not
				required to be located in a shaft in accordance with Section 708.2 are not
				required to have enclosed elevator lobbies.
3. Enclosed elevator lobbies are not required
				where additional doors are provided at the hoistway opening in accordance with
				Section 3002.6. Such doors shall be tested in accordance with UL 1784 without
				an artificial bottom seal.
4.
				Enclosed elevator lobbies are not required where the building is protected by
				an
automatic sprinkler system
installed in accordance with
				Section 903.3.1.1 or 903.3.1.2. This exception shall not apply to the
				following:
4.1. Group I-2
				occupancies;
4.2. Group I-3
				occupancies; and
4.3. High-rise
				buildings.
5. Smoke
				partitions shall be permitted in lieu of
fire partitions
to
				separate the elevator lobby at each floor where the building is equipped
				throughout with an
automatic sprinkler system
installed in
				accordance with Section 903.3.1.1 or 903.3.1.2. In addition to the requirements
				in Section 711 for smoke partitions, doors protecting openings in the smoke
				partitions shall also comply with Sections 711.5.2, 711.5.3, and 715.4.8 and
				duct penetrations of the smoke partitions shall be protected as required for
corridors
in accordance with Section 716.5.4.1.
6. Enclosed elevator lobbies are not required
				where the elevator hoistway is pressurized in accordance with Section
				708.14.2.
7. Enclosed elevator
				lobbies are not required where the elevator serves only
open parking
				garages
in accordance with Section 406.3.
708.14.1.
1 Areas of refuge.
Areas of refuge shall be provided as required in Section 1007.
708.14.2
Enclosed elevator
				lobby.
Where elevator hoist- way pressurization is provided in lieu of
				required enclosed elevator lobbies, the pressurization system shall comply with
				this section.
708.14.2.1
Pressurization
				requirements.
Elevator hoistways shall be pressurized to maintain a
				minimum positive pressure of 0.10 inch of water (25 Pa) and a maximum positive
				pressure of 0.25 inch of water (67 Pa) with respect to adjacent occupied space
				on all floors. This pressure shall be measured at the midpoint of each hoistway
				door, with all elevator cars at the floor of recall and all hoistway doors on
				the floor of recall open and all other hoistway doors closed. The opening and
				closing of hoistway doors at each level must be demonstrated during this test.
				The supply air intake shall be from an outside, uncontaminated source located a
				minimum distance of 20 feet (6096 mm) from any air exhaust system or
				outlet.
708.14.2.2
Rational
				analysis.
A rational analysis complying with Section 909.4 shall be
				submitted with the
construction documents
.
708.14.2.3
Ducts for system.
Any
				duct system that is part of the pressurization system shall be protected with
				the same
fire-resistance rating
as required for the elevator
				shaft enclosure.
708.14.2.4
Fan system.
The fan system provided for the pressurization system
				shall be as required by this section.
708.14.2.4.1
Fire resistance.
When located within the building, the fan system that provides the
				pressurization shall be protected with the same
fire-resistance
				rating
required for the elevator shaft enclosure.
708.14.2.4.2
Smoke detection.
The fan system shall be equipped with a smoke detector that will automatically
				shut down the fan system when smoke is detected within the system.
708.14.2.4.3
Separate systems.
A separate fan system shall be used for each elevator hoistway.
708.14.2.4.4
Fan capacity.
The
				supply fan shall either be adjustable with a capacity of at least 1,000 cfm
				(0.4719 m3/s) per door, or that specified by a
registered design professional
to meet the requirements of a
				designed pressurization system.
708.14.2.5
Standby power.
The
				pressurization system shall be provided with standby power from the same source
				as other required emergency systems for the building.
708.14.2.6
Activation of pressurization
				system.
The elevator pressurization system shall be activated upon
				activation of the building fire alarm system or upon activation of the elevator
				lobby smoke detectors. Where both a building fire alarm system and elevator
				lobby smoke detectors are present, each shall be independently capable of
				activating the pressurization system.
708.14.2.7
Special inspection.
Special inspection
for performance shall be required in
				accordance with Section 909.18.8. System acceptance shall be in accordance with
				Section 909.19.
708.14.2.8
Marking and identification.
Detection and control systems shall be
				marked in accordance with Section 909.14.
708.14.2.9
Control diagrams.
Control diagrams shall be provided in accordance with Section 909.15.
708.14.2.10
Control panel.
A
				control panel complying with Section 909.16 shall be provided.
708.14.2.11
System response
				time.
Hoistway pressurization systems shall comply with the requirements
				for smoke control system response time in Section 909.17.