NFIRS 5.0 Element: ‘Structure Type’

Definition : The identification of a structure as a specific property type.
Purpose : Information on the structure type, combined with other structural characteristics, is useful for understanding fire behavior and provides assistance in targeting fire prevention or protection efforts.
Entry : Check or mark the box best indicating the type of structure involved in the fire. If the fire was in an enclosed building or a portable or mobile structure, complete the rest of the module.
If the fire was not in an enclosed building (codes 0 and 3–8), no other entries on this module are required

Element Specification

 Specification   Value 
Requirement Mandatory
Expected Length 1
Element Type Coded Field – The coded field relating to an entry in the code table. Most coded fields allow for Plus+ One codes. For these fields the expected length of the coded entry is depicted as (National length OR Plus+ One length). Only fields with this notation in the expected length column allow for Plus+ One definitions. If the user has not provided information, an empty field should be transmitted.


Here are the NFIRS codes for the ‘Structure Type’ element

Structure Type  Code 
Enclosed Building 1
Fixed Portable or Mobile Structure 2
Open Structure 3
Air-supported Structure 4
Tent 5
Open Platform 6
Underground Structure Work Area 7
Connective Structure 8
Structure Type – Other 0

Relational Edit Rules for ‘Structure Type’

NFIRS defines relational edit rules to ensure data consistency and accuracy in its database. These are the rules for ‘Structure Type’

Rule Group  Overview 
Relational Edit Rule 66 relational edit rule 66.
Relational Edit Rule 67 relational edit rule 67.
Relational Edit Rule 68 Structure Length and Width or Total Area.

Transactions containing ‘Structure Type’

The value of this element is captured by the following transaction :

Need more NFIRS help?

Here are some other useful ressources to learn more about NFIRS.

NFIRS Codes Cheat SheetNFIRS CodingNFIRS ExamplesFDIDsPOCsNFIRS TransactionsNFIRS ModulesNFIRS ElementsNFIRS RulesNFIRS ReferenceNFIRS 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.

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Last Updated on May 6, 2023