Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Vertical Transportation
…209 unchanged lines
### An MRL controller is still located in a code-compliant control space with the required access and working clearance; "machine-room-less" eliminates the machine room, not the controller's accessible location. {note}
+### The drive type and machine arrangement shall be selected to suit the building rise, rated speed, and traffic: hydraulic for low-rise low-speed service, MRL traction for low- and mid-rise service without a machine room, and geared or gearless traction for mid- and high-rise service.
+
```datasheet
label: Drive Type and Machine Arrangement
…9 unchanged lines
default: "Traction - machine-room-less (MRL), gearless / permanent magnet"
```
−
−### The drive type and machine arrangement shall be selected to suit the building rise, rated speed, and traffic: hydraulic for low-rise low-speed service, MRL traction for low- and mid-rise service without a machine room, and geared or gearless traction for mid- and high-rise service.
### A holed (in-ground) hydraulic cylinder shall be provided with a PVC casing and a means to contain and detect oil leakage where the cylinder is installed below the water table or in environmentally sensitive soil.
…2 unchanged lines
### Traction suspension is by steel wire ropes or by coated steel suspension belts; coated-belt systems allow a smaller sheave and machine but are a manufacturer-specific component governed by ASME A17.6. {note}
+### The traction suspension means shall be specified, in accordance with ASME A17.6, as steel wire rope or coated steel suspension belt.
+
```datasheet
label: Traction Suspension Means
…13 unchanged lines
### Rated load is the load the elevator is designed and installed to lift, and ASME A17.1 ties the maximum inside car area to the rated load so that the car cannot be physically loaded beyond its rating. {note}
### A passenger elevator of 3,500 lb is the common general-purpose office and mixed-use selection; 2,500 lb suits low-rise and residential service; 4,000 lb and above is selected where a stretcher, service traffic, or freight handling is required. {note}
−### Where the building must accommodate an ambulance stretcher, at least one elevator shall meet the code's stretcher-accommodation requirement, which sets a minimum car size larger than a base passenger car. {note}
+### Where the building must accommodate an ambulance stretcher, at least one elevator shall meet the code's stretcher-accommodation requirement, which sets a minimum car size larger than a base passenger car.
```datasheet
…17 unchanged lines
### Hydraulic elevators are limited to roughly 150 fpm; MRL and geared traction commonly run 150 to 500 fpm; gearless traction is selected above 500 fpm for tall buildings. {note}
+### Rated speed shall be selected with the rise so that the full-travel run time meets the project's performance target for the building type.
+
```datasheet
label: Rated Speed
…8 unchanged lines
```
−### Rated speed shall be selected with the rise so that the full-travel run time meets the project's performance target for the building type.
−
## Ride Performance {toc}
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### Modern elevators use microprocessor-based controllers with a closed-loop variable-voltage variable-frequency (VVVF) drive for traction, or a soft-start and solid-state valve control for hydraulic, giving smooth acceleration and accurate leveling. {note}
+### The controller shall be microprocessor-based and shall execute all operating, signaling, and emergency functions required by this standard and by ASME A17.1.
+
```datasheet
label: Control System
…6 unchanged lines
```
−### The controller shall be microprocessor-based and shall execute all operating, signaling, and emergency functions required by this standard and by ASME A17.1.
−
## Dispatching {toc}
### A single car uses simple selective-collective operation; two or more cars serving common floors are grouped under a dispatcher that assigns calls to minimize wait and travel time across the group. {note}
### Destination dispatch, where passengers enter their destination at a hall terminal and are grouped by destination, raises handling capacity in tall, busy buildings but changes the lobby experience and the fixture set, and is a deliberate selection rather than a default. {note}
+### The dispatching method shall be specified based on the number of cars in the group and the building's traffic demand.
+
```datasheet
label: Dispatching
…14 unchanged lines
### Remote monitoring lets the service organization see faults and performance without a site visit and shortens response time, but where it connects the controller to a network it introduces a cybersecurity exposure that ASME A17.1 now addresses; the connection shall be coordinated with the Owner's network security requirements. {note}
+### Where a remote monitoring or remote interaction connection is provided, it shall comply with the cybersecurity provisions of ASME A17.1 and shall be coordinated with the Owner's information-security requirements.
+
```datasheet
label: Remote Monitoring
…5 unchanged lines
```
−### Where a remote monitoring or remote interaction connection is provided, it shall comply with the cybersecurity provisions of ASME A17.1 and shall be coordinated with the Owner's information-security requirements.
−
# Doors and Entrances {toc}
…4 unchanged lines
### A closed-loop (VVVF) door operator gives quiet, fast, and reliably reversing door operation and is the current standard; it is far less prone to the nuisance reversals and slow operation of older operators. {note}
+### Each car and hoistway door shall be power-operated by a door operator that opens and closes the doors in coordinated motion.
+
```datasheet
label: Door Operator
…5 unchanged lines
```
−### Each car and hoistway door shall be power-operated by a door operator that opens and closes the doors in coordinated motion.
−
## Door Configuration {toc}
### Single-speed and two-speed side-opening doors suit passenger cars; center-opening doors cut door time and suit busy passenger service; freight cars commonly use vertical bi-parting doors. {note}
+### The elevator door configuration shall be specified based on car type and traffic requirements, meeting the minimum clear opening required by the ADA Standards.
+
```datasheet
label: Door Configuration
…27 unchanged lines
### A multi-beam (curtain-of-light) reopening device senses a person or object across the full door height and reopens the doors without contact, and it has become the expected level of protection on passenger elevators. {note}
+### Passenger car doors shall be protected by a non-contact, multi-beam reopening device that reopens the doors when the path is obstructed.
+
```datasheet
label: Door Reopening Device
…5 unchanged lines
default: "Multi-beam (full-height curtain of light), non-contact"
```
−
−### Passenger car doors shall be protected by a non-contact, multi-beam reopening device that reopens the doors when the path is obstructed.
### Door dwell and nudging times shall comply with the minimum door-timing requirements of the ADA Standards and ICC A117.1.
…2 unchanged lines
### Hoistway entrance assemblies shall carry the fire-protection rating required for the hoistway enclosure by the building code, and the fire rating of the entrance shall match the rating of the surrounding wall. {note}
−```datasheet
−label: Entrance Frame and Door Material / Finish
−type: select
−drawing_ref: "finish schedule"
−options:
− - "Baked-enamel painted steel"
− - "Brushed (satin) stainless steel, No. 4 finish"
− - "Stainless steel with applied pattern / texture"
− - "Bronze or muntz metal (architectural)"
−default: "Brushed (satin) stainless steel, No. 4 finish"
−```
+### Hoistway entrances shall be fire-rated assemblies labeled to the rating required for the hoistway enclosure by the building code.
```datasheet
…7 unchanged lines
default: "1-1/2 hour (B label) - typical hoistway enclosure"
```
−
−### Hoistway entrances shall be fire-rated assemblies labeled to the rating required for the hoistway enclosure by the building code.
### Each entrance shall include a sill, the fire-rated door panels, the frame, and the hangers and tracks as a labeled assembly.
+```datasheet
+label: Entrance Frame and Door Material / Finish
+type: select
+drawing_ref: "finish schedule"
+options:
+ - "Baked-enamel painted steel"
+ - "Brushed (satin) stainless steel, No. 4 finish"
+ - "Stainless steel with applied pattern / texture"
+ - "Bronze or muntz metal (architectural)"
+default: "Brushed (satin) stainless steel, No. 4 finish"
+```
+
# Cab Enclosure and Finishes {toc}
…21 unchanged lines
### LED lighting is the standard car illumination; it reduces heat load on the cab and energy use, and it lasts far longer than the lamps it replaces. {note}
+### The car lighting type shall be specified, including whether battery-backed emergency lighting is integral to the light fixtures.
+
```datasheet
label: Car Lighting
…92 unchanged lines
## Car and Clearances {toc}
−### The accessible car must provide a wheelchair turning or clear space, level stops, and a small, controlled gap to the landing so a wheelchair user can enter and turn. {note}
+### The accessible car must provide a wheelchair turning or clear space, level stops, and a small, controlled gap to the landing so a wheelchair user can enter and turn.
### The accessible car inside dimensions shall comply with ADA Standards Section 407.4 for the door location provided.
…56 unchanged lines
## Sprinkler and Power Interface {toc}
−### Where sprinklers are installed in the hoistway, machine room, or machinery space, the elevator must shut down before the sprinkler discharge can wet energized equipment, which requires a coordinated detection-and-shutdown (shunt trip) interface that is a frequent source of acceptance failures. {note}
+### Where sprinklers are installed in the hoistway, machine room, or machinery space, the elevator must shut down before the sprinkler discharge can wet energized equipment, which requires a coordinated detection-and-shutdown (shunt trip) interface that is a frequent source of acceptance failures.
### Where sprinklers are provided in the hoistway, machine room, machinery space, or control space, automatic main-line power shutdown (shunt trip) shall be provided and shall be initiated by a detector that responds before the sprinkler in that space operates, in accordance with ASME A17.1 and NFPA 72.
…2 unchanged lines
# Emergency and Standby Power {toc}
−## On loss of normal power, the building's standby source can return cars to a landing and, where required, keep selected cars running; the selection and recovery sequence must be defined or cars will sit stalled or the standby source will be overloaded by simultaneous starts. {note}
+## On loss of normal power, the building's standby source can return cars to a landing and, where required, keep selected cars running; the selection and recovery sequence must be defined or cars will sit stalled or the standby source will be overloaded by simultaneous starts.
## Standby Power Operation {toc}
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### A traction elevator returns energy to the source when an overhauling load drives the machine (a full car descending or an empty car rising); a regenerative drive feeds that energy back to the building rather than burning it as heat, cutting energy use and machine-room cooling load. {note}
+### Where a regenerative drive is provided, the regenerated power and the harmonic distortion fed to the building shall be stated in the power confirmation submittal and coordinated with the electrical design.
+
```datasheet
label: Regenerative Drive (Traction)
…6 unchanged lines
```
−### Where a regenerative drive is provided, the regenerated power and the harmonic distortion fed to the building shall be stated in the power confirmation submittal and coordinated with the electrical design.
−
# Hoistway, Pit, and Overhead {toc}
…140 unchanged lines
## The elevator manufacturer and installer warrant the equipment and installation against defects in materials and workmanship for the period below, beginning at acceptance and beneficial use. {note}
+### The manufacturer and installer shall warrant the elevator equipment and installation against defects in materials and workmanship for the specified period, beginning at acceptance and beneficial use.
+
```datasheet
label: Elevator Warranty Period
…4 unchanged lines
default: "1 year from acceptance / beneficial use (minimum)"
```
−
−### The manufacturer and installer shall warrant the elevator equipment and installation against defects in materials and workmanship for the specified period, beginning at acceptance and beneficial use.
### Defective materials and workmanship discovered within the warranty period shall be corrected at no cost to the Owner.
### The warranty shall exclude damage caused by misuse, abuse, vandalism, or operation outside the rated service conditions, and damage caused by failure of building power, water intrusion, or environmental conditions outside the equipment's published range.
…18 unchanged lines
### A recommended spare-parts list with reorder information shall be included in the operation and maintenance manuals so the Owner can procure spares over the equipment's service life.