01
Confirm exemption or trigger early
Do not assume every shallow pit needs the same submission route. Check depth, plan area, material, site context and whether the work is within a building worksite before pricing.
ERSS cost-saving tips without compromising safety or BCA compliance
Practical ways to reduce redesign, authority delay, over-conservative temporary works and avoidable site cost.
Cost control strategy
The best ERSS saving is usually made before submission.
In ERSS work, late information, unclear staging and poorly coordinated submissions often cost more than the design fee. The objective is not to cut professional checks, but to remove waste and avoid rework.
02
Package small excavations properly
For basement or main excavation projects, localised pits may need to be submitted as part of the main ERSS plan. A consolidated package is often cleaner than fragmented submissions.
03
Get SI right once
A proper site investigation report with necessary certification reduces guesswork. Poor soil information can lead to conservative design, AC comments and redesign.
04
Use buildable ERSS staging
Design the ERSS around actual access, machinery, traffic, utilities and casting sequence. A beautiful calculation that cannot be built cheaply is not economical.
05
Engage checker early
When AC / AC(Geo) is likely required, early checker comments reduce last-minute redesign and programme compression.
06
Reuse steel carefully
Where re-used structural steel is proposed, specifications and condition checks must be addressed. Cheap reused material can become expensive if rejected or inadequately documented.
Common tricks that save cost
Commercial tips for owners, contractors and architects.
1. Optimise excavation depth and footprint
Before finalising layout, ask whether the pit can be made shallower, smaller or shifted away from sensitive boundaries. Small dimensional changes can move the project into a simpler submission / checking pathway.
2. Avoid unnecessary piecemeal submissions
Where multiple pits, trenches or utility works form part of the same construction sequence, review whether a coordinated submission is more efficient than separate ad-hoc submissions.
3. Freeze the ERSS basis before authority submission
Changes after QP / AC review can restart calculations and drawings. Confirm platform levels, excavation levels, crane / machinery loads, sequence and groundwater assumptions before submission.
4. Match ERSS system to contractor capability
A contractor who already has suitable equipment and experience may execute faster and cheaper than a theoretically cheaper system that requires unfamiliar subcontracting.
5. Plan monitoring as part of design, not as an afterthought
Monitoring points, frequency, trigger levels and responsibility should be clear. Poor monitoring planning can lead to stoppages, disputes and urgent professional attendance.
6. Keep a single authority comment tracker
Use one tracker for BCA comments, QP responses, AC responses and drawing revisions. This reduces duplicated replies and missed comments.
7. Do not mobilise before submission readiness
Early mobilisation may look like progress but can become idle cost if approval / NOA, permit or commencement steps are not ready.
8. Record as-built information during construction
End-stage record plan preparation is faster and cheaper when pile records, strut installation records, monitoring logs and photos are collected progressively.
False economy to avoid
- Skipping SI or relying on unsuitable soil assumptions.
- Starting design before final excavation level is fixed.
- Delaying AC / geotechnical review until the last week.
- Using reused steel without condition documentation.
- Ignoring adjacent building, road, drain or utility constraints.
- Assuming BCA comments can be answered without revised drawings.
Information that helps us quote accurately
- Maximum excavation depth and footprint.
- Whether the works are temporary, permanent or mixed.
- Whether basement / GBW is involved.
- SI report availability and date.
- Proposed ERSS system and contractor method statement.
- Urgency and target commencement date.
Want us to review possible ERSS savings?
Send us the tender drawings, contractor proposal and excavation schedule. We can identify missing items, likely submission triggers and avoidable cost risks.