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Finger Plate Expansion Joint

bridge.superstructure.expansion_joint_system.finger_plate

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Definition

Finger Plate Expansion Joint spanning the deck joint.

Class kind: component
Abstract: no
Depth: 3
Origin: reference source
Ontology: engineering-reference-book.bridge v1.0.0
Aliases: Finger Joint
Abbreviations: —
Last changed: 7/27/2026, 2:50:05 PM

Identification

Positive labels: Finger Plate Expansion Joint, Finger Joint
Negative labels: —
Visual features: transverse line across deck; joint assembly detail
Min identity clues: 2

Evidence

Preferred views: plan, cross_section, joint_detail, joint_schedule
Evidence types: view, detail, schedule, note, dimension, level, section_callout
Source trace required: yes

Measurements (4)

Name	Symbol	Unit	Required
Joint Length	`L_joint`	m/mm	required
Movement Range	`MOV`	mm	required
Instance Count	`N`	count	required
Material Type	`MAT`	—	required

Relationships (1)

connectsbridge.superstructure.deck_system

BOQ items (1)

Item code	Formula	Result	Unit
`bridge.joint.finger_plate.length`	`L_joint * N`	length	m

Validation

Blocking if missing: yes
Human review allowed: yes

no_evidence_no_number
retain_document_page_bbox_and_evidence_id
do_not_mix_drawing_revisions
do_not_average_conflicting_values
prefer_explicit_labels_over_shape_only
match_plan_elevation_and_section_when_applicable

Provenance

Basis: engineering_reference
Project values included: no

Children (0)

None — this is a leaf class and can be deleted.