NFIRS 5.0 Element: ‘Exposure Number’
When a fire involves more than one building, each building fire should be considered a separate fire, with the ignition for all but the original building fire classified as exposure fires.

The Incident Date for each exposure remains the same as that of the basic incident; however, the Alarm Time in Block E1 should reflect the time of each new exposure.
Element Specification
Specification | Value |
---|---|
Requirement | Mandatory |
Element Type | Numeric – Integer numbers (no decimal points). If the user has not provided information, an empty field should be transmitted. All integer values are assumed to be positive. Any fields which allow a negative integer value have been denoted with ‘+ or –’ in the comment field. Negative numbers should be transmitted with the minus sign preceding the digits. – – Starting at Zero |
Relational Edit Rules for ‘Exposure Number’
NFIRS defines relational edit rules to ensure data consistency and accuracy in its database. These are the rules for ‘Exposure Number’
Rule | Group | Overview |
---|---|---|
Relational Edit Rule 1 | Transaction | Key must be Unique. |
Relational Edit Rule 2 | Content | Exposure number positive. |
Transactions containing ‘Exposure Number’
The value of this element is captured by the following transactions :
- Incident Header
- Basic Incident
- Incident Address
- Aid Given Received
- Officer In Charge
- Member Making Report
- Incident Remarks
- Fire
- Structure Fire
- Wildland Fire
- Fire Mobile Property Involved
- Fire – File attached
- Fire – Equipment Involved
- EMS Patient
- Arson
- Arson Agency Referral
- Arson Juvenile Subject
- Apparatus
- Personnel
- Civilian Fire Casualty
- Fire Service Casualty
- Fire Service Casualty – Equipment Failure
- Special Study
Need more NFIRS help?
Here are some other useful ressources to learn more about NFIRS.
NFIRS Codes Cheat Sheet – NFIRS Coding – NFIRS Examples – FDIDs – POCs – NFIRS Transactions – NFIRS Modules – NFIRS Elements – NFIRS Rules – NFIRS Reference – NFIRS Compliant ?
You can also read this NFIRS 5.0 Complete Reference Guide, and NFIRS 5.0 Design Documentation in order to have a deeper understanding of NFIRS 5.0. Here are also NFIRS 5.0 Forms ready for you to download and use.
We are here to help, Feel free to contact us if you need any additionnal informations.
Last Updated on April 28, 2023