New machines and planned upgrades

AS 4324.1:2025 Design and Commercial Impact Review

ACE helps OEMs and asset owners understand how AS 4324.1:2025 affects new machine designs and planned upgrades. A scoped gap study identifies changes to the design basis, gaps in supporting evidence and effects on connected systems. The review can then compare design options and their cost and programme implications, with support to develop and substantiate the selected solution for independent review.

Cover of AS 4324.1:2025: Mobile equipment for continuous handling of bulk materials, Part 1: General requirements for the design of steel structures

Work with ACE to interpret applicable requirements, compare practical design options and prepare evidence before tender submission, design freeze or procurement. The aim is to reduce avoidable redesign and improve cost visibility and control.

A gap study (or delta assessment) compares the agreed earlier design basis and available evidence against the applicable requirements of AS 4324.1:2025. It distinguishes changes attributable to the 2025 edition from existing obligations, client specification additions, upgrade scope and missing documentation.

OEMs and fabricators

Clarify tender assumptions, identify design work that can be retained with evidence, define supplier scope and resolve interfaces early. Assess potential cost and margin exposure before committing to a design or supplier package.

Asset owners

Assess upgrade feasibility, infrastructure capacity, operating and maintenance implications, shutdown requirements and expenditure priorities.

A lower equipment supply price may introduce additional infrastructure, controls, testing or maintenance obligations elsewhere. The review identifies these cost transfers so options can be compared on a consistent project basis.

Four connected areas of review

01 · Design basis and potential gaps

Establish the applicable editions, contractual requirements, machine configuration and assessment boundary. Record demonstrated shortfalls, potential gaps, missing evidence and unresolved interpretations separately.

For an existing machine, agree the assessment boundary first. The review does not assume that every modification requires complete reassessment against every provision, or that every 2025 change is more stringent.

02 · Discipline interfaces

Trace effects across structural, mechanical, hydraulic, electrical and controls, functional safety, civil infrastructure and operations. Identify the specialist inputs required and who is responsible for them.

The interface review considers the wider machine and project. It does not imply that AS 4324.1 alone governs every discipline.

03 · Cost implications

Identify engineering, equipment, fabrication, installation, testing and shutdown cost drivers. Develop indicative estimates where the available information supports them, using OEM, supplier and client inputs.

State the assumptions, estimate maturity and unpriced exposure alongside the comparison. The review identifies cost drivers and uncertainty; it does not replace supplier quotations.

04 · Scope, procurement and programme

Assess effects on tender scope, vendor packages, procurement lead times, design changes, review cycles and programme. Compare practical responses and identify decisions required before the next project commitment.

Any proposed protective or alternative design strategy must be checked and substantiated against applicable requirements. Owner agreement alone does not establish compliance.

What you receive

A prioritised design and impact register, supported by recommendations.

Each significant item connects the engineering basis to an action and project decision.

Requirement and evidenceThe applicable basis, available evidence and finding status.
Technical consequenceWhat the finding means for the design or assessment.
Affected interfacesConnected systems, specialist inputs and responsibilities.
Cost and programme exposureCost drivers, timing effects, assumptions and unpriced items.
Options, action and decisionPractical responses, recommended action and the decision needed.
Responsibility and closure evidenceWho provides the next input and what evidence is required to resolve the finding.

The register identifies what may be retained, what requires further verification, what needs redesign and what information is needed to resolve uncertainty. Priorities reflect the engineering significance and the next project commitment.

See a sample impact register · Hydraulic cylinder

Hypothetical example. This illustrates the review method; it is not a client result or a verified new requirement of the 2025 edition.

Requirement and evidence: Establish the applicable cylinder and connected machine assessment criteria. Review geometry, load cases, cylinder data and hydraulic arrangements.
Evidence gap and attribution: The force envelope and connected component capacities have not yet been substantiated. Record the missing evidence separately. Attribute any additional requirement to the 2025 edition only after comparing the applicable provisions with the agreed earlier design basis.
Technical consequence: Cylinder selection cannot be resolved from an isolated capacity check. Assess the governing forces, geometry and effects on the connected machine.
Affected interfaces: Pins, clevises, brackets, supporting structure, hydraulics, controls and vendor scope. Identify the specialist inputs and responsibilities required.
Cost and programme exposure: Possible cylinder or component changes, supporting calculations, fabrication and vendor revisions. Costs and lead times remain unpriced until the option and supplier inputs are defined.
Options and decision: Retain the arrangement with suitable substantiation, or compare revised cylinder and connected system options. Establish the design direction and outstanding checks before component release.
Closure evidence: Checked calculations, confirmed supplier information and documented review responses, with any unresolved items assigned for follow up.

The preferred response depends on the connected machine effects and the fabrication, procurement and maintenance constraints.

Engineering experience applied to the review.

ACE’s linear stacker gap study connected changes in the design basis with the further assessments and discipline inputs needed for detailed design.

Anticipate review issues: identify weaknesses in assumptions, calculations, interfaces and supporting evidence.
Develop practical options: work within machine geometry, procurement and fabrication constraints.
Follow connected effects: trace local changes through mass, balance, support loads, mechanisms and controls, with specialist input where required.

Anthony Nguyen brings third party auditing, OEM design and whole machine assessment experience from his previous roles. View Anthony’s professional background.

Engagement pathway

Start with one defined machine or upgrade.

01
Design and Commercial Impact Review
A scoped paid review of one defined machine or upgrade, producing the prioritised register and recommendations.
02
Design Basis and Options Package
Targeted calculations, comparison of practical options and a recommended design direction.
03
Design Development and Audit Support
Engineering input, supporting calculations, evidence preparation and responses to review findings.

The agreed scope identifies whether the work is a technical gap study or also includes design option, cost and programme comparisons. Inputs, deliverables, configurations and review cycles are agreed before quoting. Detailed modelling and iterative redesign are scoped separately. Where information is immature, an initial paid scoping stage can establish the review basis and work required.

Where ACE develops a solution, independent verification is separately arranged where required. Design support and responses to review findings do not replace the independent reviewer’s responsibilities.

Discuss your machine, design basis and next project decision.

Include the machine, proposed work, available design information and the next tender, procurement or design milestone.

Discuss your design review