span
Let an agent handle spans by structure, length, type, design and inspection, and separate other senses such as time span and wingspan.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Claude
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Measure Length.
Length
Value.
Length
Span length.
- What is the span length and how is it measured? measurement
- Is it clear span or centre-to-centre? definition
Context
Which structure.
Context
Structure.
- Which bridge, beam or roof is meant? provenance
- Is it the main span? definition
Design Structural choice.
Type
Structural system.
Type
Structural system.
- Which structural system suits this span? definition
- Why? definition
Tables
Span tables.
Tables
Span tables.
- What span does the table allow for this beam and load? provenance
- Should an engineer check the design? action
Safety Loads and inspection.
Loads
Limits.
Loads
Load limits.
- What load limits apply to the span? provenance
- Are weight restrictions posted? provenance
Inspection
Condition.
Inspection
Inspection.
- When was the span last inspected? provenance
- What condition was recorded? provenance
Senses Disambiguation.
Time
Time span.
Time
Time sense.
- Is a period of time meant? boundary
- Which entry fits? action
Other
Wingspan, hand span.
Other
Other senses.
- Is a wingspan or hand span meant? boundary
- Which entry fits? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Cross-cutting context
- Entry kind
- thing
- Plane
- XCT
- Domain
- XCT.QTY
- Also called
- eastbound span, westbound span, northbound span, southbound span, bridge span, main span
What it is Filled
The distance between two supports of a structure such as a bridge, beam or arch, or the structural section between them; also the full length of a bridge carriageway in one direction.
Why it exists Filled
Let an agent handle spans by structure, length, type, design and inspection, and separate other senses such as time span and wingspan.
Distinguishing features Filled
- Distance between supports
- Drives structural choice
- Measured in several ways
- Key for loads and deflection
What robots and AI may and may not do Filled
Must not
- Approve loads on a span beyond its rated capacity.
- Hide or downplay defects found in a span that people cross or work under.
- Alter supports or remove members of a span without engineering approval.
Only with a human decision
- Closing or reopening a bridge span to traffic.
- Accepting a span as safe after damage or repair.
May
- Report the span of a bridge or beam from design records or measurement.
- Flag deflection, cracking or damage in a span to the structure's owner.
Moral aspects Filled
- People cross and live under spans; a failure kills without warning.
- Closing a span cuts off communities and emergency access.
Who is affected
- People crossing or under the structure
- Communities that depend on the crossing
- Workers on inspection and repair
Owners Filled
Steward
The owner of the structure, such as a highway or rail authority; a qualified engineer answers for its design.
Master systems
- Bridge and structure asset registers
Links to other meta-models Filled
parent
- Q36253 - registry parent class
- Q811679 - registry parent class
related
- length and structural element - category
- bridge - structure
- pier and abutment - supports
- time span - another sense
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.span
- Wikidata: Q1960395 (https://www.wikidata.org/wiki/Q1960395)
Direct properties not applicable Not applicable
- longest suspension bridge main spans: about 2000 m - order of magnitude, record holders
Plane XCT: no invented physical properties.
Recognition optional Filled
- Main span and side spans
- Clear span versus centre-to-centre
- Wingspan and time span are other senses
- The open length of a bridge or beam between piers, abutments or columns.
Capabilities and actions required Filled
- compare bridge spans
- relate span to structural type
- check span tables for beams
- find inspection and load information
Hazards and failure modes required Filled
- Excessive deflection
- Overloading
- Using span tables beyond their scope
Standards and interfaces required Filled
- Eurocodes for bridge and beam design
- Timber and steel span tables
- Bridge inspection standards
Context of use required Filled
- Describing and designing structures between supports.
- main spans
- side and approach spans
- clear spans
- continuous and simple spans
Sources Missing, in the backlog
Not described yet. This gap is in the card backlog.
Note: Written from model knowledge without web access; claims are unverified.
Open questions
- Should span types be separate entries?
- How should bridge records be linked?
- How should other senses be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1960395/spec.json