UpCodes logo
Jump To Full Code Chapter
Where elevator hoistway 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.

Related Code Sections

3006.1 Elevators and Conveying Systems, General
Elevator hoistway openings and enclosed elevator lobbies shall be provided in accordance with the following: Where hoistway opening protection ...
3006.1 Elevators and Conveying Systems, General
Elevator hoistway openings and enclosed elevator lobbies shall be provided in accordance with the following: Where hoistway opening protection ...