Quick answer: Piling and underpinning work often needs a SWMS because it involves structural support, excavation, heavy plant, and potentially unstable ground conditions near existing structures.
Last reviewed: March 2026 by the BlueSafe Technical Team. Reflects current Australian WHS requirements.
Piling and underpinning are specialised foundation activities with very little margin for error. The method should explain how the work will proceed without destabilising the structure, undermining adjacent ground, or exposing workers to uncontrolled plant and excavation risks.
At a glance
| Item | Summary |
|---|---|
| SWMS legally required? | Often yes |
| Licence required? | Depends on task |
| Main hazards | Ground instability, structural movement, plant interaction, excavation collapse |
| Common work types | Bored piling, driven piling, underpinning, deep foundation work |
| Key controls | Sequencing, exclusion zones, support verification, monitoring, access control |
| Main document issue | Structural and geotechnical conditions must be matched to the method |
Why piling and underpinning often need a SWMS
These tasks commonly involve:
- excavation and below-ground access
- temporary or staged structural support
- heavy plant and lifting operations
- work close to existing structures or services
That combination makes a SWMS important and often necessary.
What the SWMS should cover
A practical piling or underpinning SWMS should explain:
- the foundation method being used
- the sequence of excavation or drilling
- how structural support is maintained
- how plant and workers are separated
- what monitoring or hold points apply
The sequence is critical because each stage can change the load path or ground condition.
Common hazards
Common hazards include:
- trench or excavation collapse
- unexpected structural movement
- struck-by incidents from plant or tools
- contact with underground services
- restricted access in tight work areas
- failure to maintain temporary support
Related guides
- Excavation and Trenching SWMS - Depths, Requirements and What to Include
- Formwork SWMS - What Must Be Included for Temporary Structures
- Construction SWMS Guide for Australian Builders and Contractors
Frequently asked questions
Does piling or underpinning work need a SWMS?
Often yes, because the work combines structural, excavation, and plant risks.
Why is underpinning high risk?
Because it can affect structural stability, ground conditions, and worker safety if not sequenced correctly.
What should a piling or underpinning SWMS include?
Excavation method, sequencing, support controls, plant movement, exclusion zones, and monitoring.
Can one generic construction SWMS cover this work?
No. The controls need to be more specific.
SWMS templates for piling and underpinning work
- Piling Operations SWMS for piling tasks involving drilling, plant movement, and exclusion controls.
- Underpinning SWMS for staged support work around existing structures.
- Deep Foundation Works SWMS for more complex foundation activities requiring detailed planning and sequencing.