Exchange Requirement: Handrail
Name
Handrail
Identifier
er_handrail
Change Log
| Date (yyyy-mm-dd) | Action | Author (email) |
|---|---|---|
| 2025-12-09 | Initial draft | AI Generated |
Project Stage
Select the applicable project stage(s); remove rows that do not apply.
| Code | Stage |
|---|---|
| 0 | Portfolio requirements |
| 1 | Conception of need |
| 2 | Outline feasibility |
| 3 | Substantive feasibility |
| 4 | Outline conceptual design |
| 5 | Full conceptual design |
| 6 | Coordinated design and procurement |
| 7 | Production information |
| 8 | Construction |
| 9 | Operation and maintenance |
| 10 | Disposal |
Overview
Provide a textual overview of the exchange requirement under the headings Scope, General Description and Information Description. Keep it non-technical and aimed at an executive audience.
Scope
The scope of this exchange requirement is to enable the exchange of handrail information including identification, spatial location (alignment-based and coordinate-based), type classification, height, material properties, and ADA compliance parameters necessary for pedestrian safety and accessibility.
General Description
Handrails provide pedestrian support and fall protection along stairs, ramps, retaining walls, and bridge structures within highway facilities. This exchange requirement captures both the geometric definition and the specification properties necessary for design coordination, ADA compliance verification, and construction documentation. The information model supports referencing handrails to highway alignments using stationing and offset data, as well as absolute positioning using state plane coordinates, GPS coordinates, and LRS data.
Information Description
The information exchanged through this requirement includes the following parts:
- Identification
- Alignment Data Linear
- State Plane Coordinates Linear
- LRS Data Linear
- GPS Coordinates Linear
- Handrail Features
- Handrail Layout
- Handrail Persistence
- Pay Item Information
Information Requirements
Preconditions
Before exchanging handrail information, the following information must be available: Alignment and corridor geometry must be established (see Exchange Requirement: Horizontal Alignment, Exchange Requirement: Pedestrian Travelway). Project coordinate system must be defined. ADA design criteria and state-specific accessibility standards must be identified. Applicable structural standards for handrail design and loading must be established.
Parts
A part is a set of information that achieves a specific purpose or function within this exchange requirement (for example: Select Object, Assign To Group, Associate Library Reference). An exchange requirement is expected to consist of many parts.
Repeat the following block for each part.
Part: Identification
- Purpose: Uniquely identify each Handrail element for database management, field verification, and asset tracking.
Concept: Assign Unique Identifiers
- Purpose: Establish unique identification for each Handrail instance to support data management and asset tracking.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Object ID | Unique ID assigned to each asset in database (Type: STRING, Cardinality: R) |
| Feature ID | Specific point, linear, and surface designation (Type: STRING, Cardinality: O) |
| Feature Description | Specific point, linear, and surface detailed description (Type: STRING, Cardinality: O) |
| Survey Feature Code | Short abbreviation surveyors use in the field to identify and describe physical features and data points encountered (Type: STRING, Cardinality: O) |
Part: Alignment Data Linear
- Purpose: Reference the Handrail location to the project alignment and corridor system using stationing and offset measurements.
Concept: Reference to Alignment System
- Purpose: Establish the relationship between Handrail elements and the roadway alignment/corridor framework.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Alignment ID Reference | Alignment ID that is referenced for element layout (Type: STRING, Cardinality: R) |
| Corridor ID Reference | Corridor ID that is referenced for element layout (Type: STRING, Cardinality: R) |
| Station Begin | Station of linear location - begin (Type: REAL, Units: Stationing, Cardinality: R) |
| Station Offset Begin | Offset of linear location - begin (Type: REAL, Units: Feet, Cardinality: R) |
| Station End | Station of linear location - end (Type: REAL, Units: Stationing, Cardinality: R) |
| Station Offset End | Offset of linear location - end (Type: REAL, Units: Feet, Cardinality: R) |
| Reference Point Location | Placement of point for offset (i.e. gutterline for traffic barrier feature) (Type: STRING, Cardinality: R) |
Part: State Plane Coordinates Linear
- Purpose: Provide absolute positioning using state plane coordinate system for survey control and GIS integration.
Concept: Absolute Coordinate Positioning
- Purpose: Define Handrail location using state plane coordinates independent of alignment references.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Northing Begin | The “Y” values of coordinates represented on a plane coordinate system - Begin (Linear) (Type: REAL, Units: Feet, Cardinality: R) |
| Easting Begin | The “X” values of coordinates represented on a plane coordinate system - Begin (Linear) (Type: REAL, Units: Feet, Cardinality: R) |
| Northing End | The “Y” values of coordinates represented on a plane coordinate system - End (Linear) (Type: REAL, Units: Feet, Cardinality: R) |
| Easting End | The “X” values of coordinates represented on a plane coordinate system - End (Linear) (Type: REAL, Units: Feet, Cardinality: R) |
Part: LRS Data Linear
- Purpose: Support integration with Linear Reference Systems (LRS) for asset management and maintenance operations.
Concept: LRS Integration
- Purpose: Enable referencing of Handrail assets within agency LRS databases.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Postmile Begin | Mile post of point location - begin (Type: REAL, Units: Mile, Cardinality: O) |
| LRS Offset Begin | Linear Reference System offset of point location - begin (Type: REAL, Units: Feet, Cardinality: O) |
| Postmile End | Mile post of point location - end (Type: REAL, Units: Mile, Cardinality: O) |
| LRS Offset End | Linear Reference System offset of point location - end (Type: REAL, Units: Feet, Cardinality: O) |
Part: GPS Coordinates Linear
- Purpose: Provide GPS-based location data for field verification and mobile data collection.
Concept: GPS Positioning
- Purpose: Support field crews with GPS coordinates for location verification.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Latitude Begin | Latitude of linear location - begin (Type: REAL, Cardinality: O) |
| Longitude Begin | Longitude of point location - begin (Type: REAL, Cardinality: O) |
| Latitude End | Latitude of linear location - end (Type: REAL, Cardinality: O) |
| Longitude End | Longitude of point location - end (Type: REAL, Cardinality: O) |
| Control Points Benchmarks | Reference points with known coordinates and/or elevations, used to create a consistent horizontal and vertical datums for accurate coordination of highway right of way and private property boundaries and existing features for construction projects. (Type: STRING, Cardinality: O) |
| GPS Notes | Notes referring to GPS location data (Type: STRING, Cardinality: O) |
Part: Handrail Features
- Purpose: Define handrail type, height, material, and ADA compliance properties for pedestrian safety and accessibility.
Concept: Handrail Specification and Compliance
- Purpose: Specify handrail characteristics to ensure compliance with ADA standards and structural requirements.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Handrail Type | Pedestrian or bike handrail type usually referencing state-specific standards (Type: STRING, Cardinality: R) |
| Handrail Standard Designation | The reference to a standard drawing, specification, or other official document that provides detailed information and requirements for the handrail feature. (Type: STRING, Cardinality: O) |
Part: Handrail Layout
- Purpose: Describe the purpose of the Handrail Layout part
Concept: Handrail Layout Information
- Purpose: Describe the purpose of capturing Handrail Layout information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Handrail Height | Maximum handrail height (Type: REAL, Units: Feet, Cardinality: R) |
| Handrail Width | Maximum handrail width (Type: REAL, Units: Feet, Cardinality: R) |
Part: Handrail Persistence
- Purpose: Describe the purpose of the Handrail Persistence part
Concept: Handrail Persistence Information
- Purpose: Describe the purpose of capturing Handrail Persistence information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Temporary | An element that is installed in a short-term capacity and is not intended to be permanent (Type: BOOLEAN, Cardinality: R) |
| Permanent | An element that is intended to persist for long-term use (Type: BOOLEAN, Cardinality: R) |
Part: Pay Item Information
- Purpose: Provide construction contract administration data for cost estimation and payment processing.
Concept: Contract Pay Items
- Purpose: Define pay items associated with Handrail construction for quantity tracking and contractor payment.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
No information requirements defined for this concept.