Key facts
Code summary
Code 4390
Official title Other specialized construction activities
Version PSIC 2019
Source layer PSA / BSP
Section F - Construction
Cn
PSIC 2019 Navigation-first hub Class 4390 - Other specialized construction activities
PSIC Class 4390 covers Other specialized construction activities. Current child subclasses include Other Specialized Construction Activities. This four-digit layer is useful when comparing neighboring activities before...
Next step
Child codes
These are the next codes most users should open after this hub page.
About this level
Practical summary
Class 4390 sits in the PSIC 2019 hierarchy under F Construction > 43 Specialized Construction Activities > 439 Other specialized construction activities. This class usually fans out into more specific subclasses such as Other Specialized Construction Activities. It is the level people use when they already know the activity family but still need the exact five-digit match.
Administrative context
Where this code is used
This class is used when a business can already narrow the activity family and only needs to compare the final subclasses such as Other Specialized Construction Activities. It is the level most often checked before a five-digit decision is finalized.
Selection note
How to choose it
Use this class to choose between its final subclasses such as Other Specialized Construction Activities. If two options look close, compare the exact activity, the outputs and the way the business actually earns revenue.
Official note
Source-backed description
This class includes: Construction activities specializing in one aspect common to different kind of structures, requiring specialized skill or equipment: construction of foundations, including pile driving damp proofing and water proofing works de-humidification of buildings shaft sinking erection of non-self - manufactured steel elements steel bending bricklaying and stone setting roof covering for residential buildings scaffolds and work platform erecting and dismantling, excluding renting of scaffolds and work platforms erection of chimneys and industrial ovens work with specialist access requirements necessitating climbing skills and the use of related equipment, e.g.; working at height on tall structures Subsurface work Construction of outdoor swimming pools Steam cleaning, sand blasting and similar activities for building exteriors Renting of cranes with operator This class excludes renting of construction machinery and equipment without operator, see 7730.
FAQ
What does PSIC Class 4390 cover?
PSIC Class 4390 is the four-digit layer that sits just above the final subclasses and usually defines the activity family for Other specialized construction activities.
How do I compare Class 4390 with the sibling classes?
Read the neighboring classes and compare the exact wording of the child subclasses. Nearby options include nearby sibling codes.
Why does Class 4390 matter for a filing decision?
It is usually the last broad checkpoint before the five-digit subclass choice, so it is the right place to catch near-miss classifications.