Perimeter Design Risk Review

FLAGSHIP SERVICE

Independent specialist scrutiny of the perimeter strategy, drawings, specifications and critical interfaces — identifying hidden performance, commercial and delivery risk before it becomes embedded in the project.

Available as named client-facing support or as a white-label specialist resource for architects, consultants and design teams.

WHY REVIEW?

Perimeter security is rarely undermined by one obvious mistake. More often, risk develops as reasonable decisions are made in isolation, assumptions go untested or security intent changes as the project moves between disciplines and stages.

An independent Design Risk Review looks across the perimeter as a complete system — testing not only what has been specified, but whether the different decisions still work together.

A design can look compliant and still carry hidden perimeter risk.

ASSUMPTIONS

Has the design started from the right requirement?

Threat, operational need, performance expectation and site constraints are not always translated consistently into the developing design. An early assumption can influence everything that follows.

INTERFACES

What happens where systems, products and disciplines meet?

Gates, fences, HVM, levels, foundations, controls, buildings and package boundaries can each be satisfactory in isolation while creating weakness where they connect.

HANDOVERS

Is the market being asked to price what the client actually intends?

Design intent can be diluted through specification, tendering, substitution, contractor development and site decisions — sometimes without any single change appearing significant.

WHAT WE REVIEW

Specialist scrutiny across the developing perimeter package

Every project is different. The Design Risk Review considers the perimeter as a complete system, challenging the assumptions, technical decisions and project interfaces that can affect security performance, cost and practical delivery.

The review is structured around six specialist workstreams.

01 - DESIGN BASIS

Design Basis & Security Intent

Are we starting from the right requirement?

We review the client brief, security philosophy, site plan, stated performance requirements and applicable standards — challenging the design basis where the proposed perimeter response does not appear consistent with the information provided.

02 - LAYOUT

Perimeter Layout, Access & Operation

Will the perimeter work as a complete site system?

We review perimeter alignment, entrances, vehicle and pedestrian movements, gate operation, levels, climbing opportunities, rejection routes, road interfaces and other site conditions that can affect both security and day-to-day operation.

03 - PERFORMANCE

Standards, Certification & Product Application

Does the proposed solution genuinely deliver the claimed performance?

We test drawings and specifications against applicable standards, certified scope and known product limitations — including whether tested systems are being proposed in configurations that could alter or invalidate the performance being relied upon.

Where clarification is required, Relkron will seek confirmation from the manufacturer or certification holder where practicable.

04 - HVM

HVM Relevance & Approach Screening

Has vehicle-borne risk been properly considered in the developing design?

HVM relevance is considered on every review. We look at vehicle approaches, available run-up, entrance geometry, potential protection zones, transitions and opportunities to use site layout or existing features more effectively.

Where appropriate, we will recommend a formal project-specific Vehicle Dynamics Assessment by a suitably competent specialist.

05 — BUILDABILITY

Buildability, Foundations & Interfaces

Can the proposed perimeter actually be manufactured and built as intended?

We review product geometry, foundations, levels, civil interfaces, tolerances, access and package boundaries for practical delivery risk.

Where sufficient post and foundation information is provided, we also undertake first-pass wind-load and foundation screening to identify arrangements requiring further engineering verification.

06 — COMMERCIAL

Security Intent, Tender Scope & Commercial Risk

Does the package the market will price match what the client intends to buy?

We compare the available security brief and design intent against drawings, specifications, schedules, Bills of Quantities and tender information where provided.

The review identifies scope gaps, conflicting requirements, ambiguity, unnecessary performance requirements, proprietary constraints, substitution risk and other issues likely to emerge later as qualification, RFI, redesign, variation or avoidable cost.

A clear record of the risks, decisions and actions that matter.

The review is delivered as a concise, professionally structured report designed to help project teams understand what needs attention, why it matters and what should happen next.

01 - EXECUTIVE OVERVIEW

A concise project-level view of the most important technical, commercial and delivery risks.

WHAT YOU RECEIVE

Discuss a Design Risk Review →

Each finding classified as Critical, Significant or Advisory, helping the project team distinguish material risks from improvement opportunities.

02 — PRIORITISED FINDINGS

03 - EVIDENCE AND RECOMMENDATIONS

Clear explanation of the issue, why it matters, the potential consequence and the recommended next action — supported by marked-up drawings or technical evidence where useful.

04 - REVIEW MEETING

One structured review call to walk the project team through the findings, priorities and recommended actions.

One consolidated review of revised information addressing the original findings, helping confirm that agreed changes have been properly reflected.

Material redesign, substantially new information or review of additional design stages can be commissioned separately.

05 - FOLLOW UP CHECK

CRITICAL | SIGNIFICANT | ADVISORY

WHAT WE TYPICALLY UNCOVER

Small design decisions can create significant downstream risk

Many findings are not obvious design failures. They are reasonable decisions, assumptions or details that become problematic when considered against certification, site conditions, adjacent systems or the way the perimeter will actually be operated, procured and built.

Examples below reflect issues encountered on real projects. Project details have been anonymised.

01 - CERTIFICATION

Certified product. Outside the tested scope.

On one European project, sections of a high-security fence had been drawn at heights outside the manufacturer's certified scope, while the HVM elements were also being used differently from their tested configuration.

Identifying this early allowed the project team to involve an engineer and establish an acceptable project-specific solution rather than leaving uncertainty to emerge during procurement or construction.

02 - OPERATION

A secure gate that may need to stay open.

Gate selection is often based on opening width and security rating without testing the operating cycle against expected vehicle demand.

At peak times, an inadequately planned entrance can create queues towards the public road — sometimes resulting in the gate being left open simply to maintain throughput. Rejection routes matter too: an unauthorised vehicle should not need to enter the secure site and circulate around it simply to leave.

03 - HVM

Crash-rated does not automatically mean appropriate.

Crash-rated fencing is sometimes specified above substantial reinforced-concrete walls without considering which element would actually receive the vehicle impact.

If the wall takes the initial load, any subsequent contact with the fence may occur at a very different effective height and condition from the tested configuration. The answer may be redesign, engineering justification or conscious acceptance of the residual risk — not simply adding more rated product.

04 - EXTERNAL ENVIRONMENT

05 - BUILDABILITY

06 - COMMERCIAL

The vulnerability may sit outside the boundary.

A detail can work on paper and still be impractical to build.

The market can only price the requirement it receives.

Design teams understandably concentrate on what is being built inside their project line. Potential climbing aids outside it can easily be missed.

Park benches, parking spaces, smoking shelters and other everyday features can materially change how difficult a security fence is to overcome when positioned too close to the perimeter.

High-security fence and HVM systems can require substantial foundations. Those foundations may become impractical where dense underground ducting, cabling, drainage or other infrastructure already occupies the same space.

We also see foundation arrangements that simply appear insufficient for the proposed fence. Identifying this during design allows the responsible engineer and project team to resolve it before excavation, fabrication or installation begins.

A client may intend one security outcome while the drawings, specification, schedule or Bill of Quantities describe something subtly different.

Contractors competing for the work will quite reasonably price the compliant requirement in front of them. If the difference only becomes clear after appointment, it can surface as clarification, redesign, variation and additional cost.

The purpose of the review is to identify that difference while it is still a design issue — not a contractual one.

WHEN TO REVIEW

The earlier we are involved, the more risk can be designed out.

A Design Risk Review can add value throughout design development, but the opportunity to influence the outcome changes as decisions become more established.

For clients and design teams, Relkron recommends specialist perimeter review during developed design and ideally no later than technical design. Earlier involvement can provide even greater value where perimeter strategy, access geometry and HVM requirements are still being shaped.

For main contractors and GCs, a separate review at tender stage can identify technical and commercial exposure before it becomes embedded in the bid, programme or supply chain.

01 — EARLY DESIGN

Concept / RIBA 2

Best opportunity to influence the fundamentals.

At this stage we can challenge perimeter strategy, boundary alignment, entrance geometry, HVM relevance, operational requirements and other decisions before they become embedded in the developing design.

02 - DEVELOPED DESIGN

Spatial Coordination / RIBA 3

The ideal point for a comprehensive Design Risk Review.

There is usually enough information to interrogate the perimeter meaningfully while the project team still has realistic scope to resolve design, product, interface and operational issues efficiently.

03 — TECHNICAL DESIGN

Technical Design / RIBA 4

Detailed scrutiny before decisions become commercial commitments.

The review can test specifications, certification, product application, foundations, buildability and package interfaces before procurement or construction makes changes progressively harder and more expensive.

TENDER REVIEW

Main Contractor / GC Review

Make sure the package being priced reflects the intended outcome.

A tender-stage review can identify gaps between security intent and the drawings, specifications, schedules and scope being priced — alongside ambiguous requirements, single-source constraints, qualification risk and practical delivery issues.

HOW IT WORKS

The review is built around the information available at the relevant design stage. Send us what you have and we will confirm the review scope, identify any important gaps and take it from there.

A straightforward review process from information to action.

01 — SHARE → 02 — REVIEW → 03 — REPORT → 04 — DISCUSS → 05 — CHECK

Send us the available project information.

Drawings, specifications, security philosophy, product information and other relevant design material.

We interrogate the perimeter.

Relkron reviews the design across the six specialist workstreams and seeks technical clarification where necessary.

Receive clear, prioritised findings.

The report identifies the issues, why they matter, the potential consequence and the recommended next action.

Walk through the findings together.

One structured review meeting is included to answer questions, clarify priorities and discuss the appropriate actions.

Confirm how the findings have been addressed.

One consolidated follow-up check of revised information against the original findings is included.

Material redesign, substantially new information or review of additional design stages can be commissioned separately.

Specialist perimeter expertise where your project needs it.

Relkron works alongside clients, architects, security consultants, multidisciplinary engineers and contractors to add specialist physical-perimeter knowledge without duplicating the wider design team's role.

We can work directly with the end client, as a named specialist within the project team or discreetly behind another consultancy as a white-label resource.

WHO WE SUPPORT

MULTIDISCIPLINARY CONSULTANTS

Add specialist perimeter depth to security, architectural, civil and infrastructure design teams where the required knowledge does not sit in-house.

Provide independent scrutiny of a developing perimeter design before key technical and commercial decisions become embedded.

CLIENTS & OPERATORS

SECURITY CONSULTANTS

Support electronic and integrated security teams with specialist physical-perimeter expertise, either named or white-label.

MAIN CONTRACTORS / GCs

Review tender and developing design information for technical, commercial and delivery exposure before responsibility moves into procurement and construction.

NAMED OR WHITE-LABEL

Relkron can operate visibly as the project's perimeter specialist or work behind the lead consultant, with findings and technical input structured to integrate into the wider project team's delivery.

CLEAR SPECIALIST SCOPE

The Design Risk Review challenges the developing perimeter, identifies risk and recommends appropriate next actions. It does not replace the responsible designer, engineer or other appointed specialist.

Independent assurance without replacing the project designer.

WITHIN THE DESIGN RISK REVIEW

Review of available drawings, specifications and project information
Perimeter layout, access, product, certification and interface review
Manufacturer or certification-holder clarification where required and practicable
HVM relevance and approach screening
First-pass wind-load and foundation screening where sufficient information is available
Commercial, procurement and tender-scope review
Prioritised findings and recommended actions
One findings review meeting
One consolidated follow-up check against the original findings