Plant prestart (v1)
Plant prestart is one of Demiton's published registers for Australian civil construction. Daily plant and equipment pre-start checks: condition, defects, compliance. Demiton keeps it current from the systems a contractor already runs and publishes the record's shape as a versioned JSON Schema, so the same question works whichever system produced the record.
Part of Safety in the register catalog.
- Register ID
plant_prestartUse this name to ask for the register. The API calls it a shelf ID.- Each record is
- An eventSomething that happened at a point in time.
- Status
- AvailableFilled today from connected systems, uploads or public data.
- Data
- OrganisationPrivate to each organisation's own workspace.
- Version
- v1 (1.0.1)Superseded by v2.
Standards
This register's contract was designed against these standards and laws. Holding these records does not by itself certify compliance.
- AS 2550Cranes, hoists and winches - Safe use - Mobile elevating work platforms
- AS 2550Cranes, hoists and winches - Mobile elevating work platforms (design and construction)
- WHS Act and RegulationsModel Work Health and Safety Regulations (Safe Work Australia; given effect by each state/territory)
- ISO 45001Occupational health and safety management systems - Requirements with guidance for use
- ISO 55001Asset management - Vocabulary, overview and principles
- ISO 55001Asset management - Asset management system - Requirements
- ISO/TS 15143-3Earth-moving machinery and mobile road construction machinery - Worksite data exchange - Telematics data (AEMP 2.0)
- LOLER 1998Lifting Operations and Lifting Equipment Regulations 1998
- OSHAOSHA - Overhead and gantry cranes
Connectors
On the roadmap
Systems in the planned connector rollout that can fill this register. Partial means the system holds only some of its fields.
- EROAD
- GeotabPartial
- HammerTech
- MittiPartial
- Sitemate
Fields
20 fields: 5 required, 13 optional, 2 defined by each organisation.
Required
Every record carries these fields.
- assetNumber
The item of plant the prestart is about.
Example:
9301- external_idText
The source form-result's own identifier, as text.
Example:
PP-2026-8891- occurred_atDate and time
When the prestart was submitted; the date the retention clock runs from.
Example:
2026-07-14T21:30:00Z- flagged_countWhole number
How many answers name a fault; the shelf's primary condition signal.
Example:
0- source_systemText
Which bound system emitted the row;
ASSIGNARtoday.Example:
ASSIGNAR
Optional
Present when the source system records them.
- workerNumber
The worker who submitted the prestart; an anchor, not a declared axis.
Example:
5501- form_idNumber
The source form template identity.
Example:
211- projectNumber
The project the plant was pre-started on that day.
Example:
8101- certifierText
The competent person who performed or certified the prestart.
Example:
Aaron Patel- jurisdictionText
The WHS/examination regime whose interval and retention rule apply.
Example:
AU-QLD-WHS- source_unitsGroup of fields
The source unit each measure arrived in, beside the canonical unit.
- tag_severityWhole number
The green/yellow/red plant tag at its worst on the form.
Example:
1- prestart_dateDate
The date the form itself carries, where it differs from submission time.
Example:
2026-07-14- narrative_countWhole number
How many free-text answers were filled in.
Example:
2- inspection_classText
Pre-operational / routine / major inspection.
Example:
pre-operational- unanswered_countWhole number
How many answerable questions were left blank.
Example:
0- hour_meter_readingDecimal number
The machine's hour-meter reading recorded at the prestart.
Example:
4123.5- asset_registration_numberText
The registration number for plant that must be registered before use.
Example:
QLD-PLT-88210
Defined by each organisation
Their contents come from the organisation's own forms or systems, so they differ between organisations.
- form_titleText
The tenant's own name for the prestart form the record was captured on; the key the
form_patternsweep matches.Example:
Plant Prestart Checklist- tenant_payloadGroup of fields
The tenant's own prestart questions and answers — check-item results, selectors, comments, the grout/mixer numerics.
Example record
A sample from Bridgeworks Group, Demiton's demonstration company. The values are illustrative; the shape is exactly what the contract describes.
{ "asset": 9301, "asset_registration_number": "QLD-PLT-88210", "certifier": "Aaron Patel", "external_id": "PP-2026-8891", "flagged_count": 0, "form_id": 211, "form_title": "Plant Prestart Checklist", "hour_meter_reading": 4123.5, "inspection_class": "pre-operational", "jurisdiction": "AU-QLD-WHS", "narrative_count": 2, "occurred_at": "2026-07-14T21:30:00Z", "prestart_date": "2026-07-14", "project": 8101, "source_system": "ASSIGNAR", "tag_severity": 1, "unanswered_count": 0, "worker": 5501}Version history
- v2 (current)
- v1
Use this contract
The contract is a standard JSON Schema (draft 2020-12) document, so any JSON Schema validator can check a record against it. Keywords starting with x-demiton- add Demiton's own meaning, such as units and requiredness, and validators ignore them.
https://docs.demiton.io/registers/plant_prestart/v1.jsonShow the full JSON Schema
Loading the schema…
Talk to the team
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