Calculations and Surveys
Delivering accurate commercial surveys and robust structural calculations is the critical foundation that ensures every facade, extension, alteration or new-build project is safe, compliant and buildable.
From wind-loaded curtain walling and rainscreen cladding systems to structural steel supports, bracketry, roof extensions and commercial refurbishments, our commercial calculations, structural calculations and wind load calculator services provide the engineering certainty needed to satisfy building control, insurers, manufacturers and clients, reducing risk, avoiding costly redesigns and enabling smooth approvals.
Whatever the technical demands of your commercial project, our engineers and surveyors work closely with architects, contractors, fabricators and developers to capture site realities, performance requirements and regulatory obligations, guiding you from initial survey through to certified calculation packages.
Our Calculations and Surveys Service
Our commercial surveys and structural calculations packages deliver everything required for regulatory approval, manufacturer compliance and confident construction, including:
- Comprehensive site visit and detailed commercial surveys to capture accurate as-built dimensions, levels, tolerances and existing conditions
- Measured surveys of facades, structures, roofs and interfaces using laser scanning, total stations and photogrammetry where required
- Full structural calculations for new and altered elements; steelwork, concrete, timber, foundations, connections and load paths
- Site-specific wind load calculations using BS EN 1991-1-4 (Eurocode) or BS 6399, including terrain, height, exposure and shape factors
- Wind load calculator outputs tailored to leading facade systems (curtain walling, rainscreen cladding, windows, brackets, etc.)
- Load takedowns, deflection checks, connection design and foundation assessments
- Certification packages suitable for building regulations submission, structural engineer sign-off and manufacturer validation
- Clear, concise calculation reports with summary sheets, assumptions, references and output tables
Optional coordination with planning, building control and third-party approvals
From straightforward bracket load checks to complex multi-storey facade wind engineering, our in-house engineering team manages the entire process. Using industry-standard software (TEDDS, SCIA, Robot, hand calcs where appropriate), we produce precise, fully referenced and auditable documentation for a seamless, stress-free approval and construction experience.
Ready to remove all doubt from your project?
Book a consultation with one of our engineers or surveyors today.
Calculations and Surveys FAQs
Commercial surveys are accurate, measured assessments of existing buildings or sites, capturing dimensions, levels, structural elements, facade details and tolerances. They form the essential starting point for reliable design, calculations and detailing, especially important for facades, extensions and refurbishments.
Structural calculations are detailed engineering analyses that prove proposed or existing elements can safely carry all applied loads (dead, live, wind, snow, seismic where relevant) while meeting deflection, vibration and durability limits. They are required for building regulations approval and are often demanded by insurers and manufacturers.
Wind load calculations determine the forces a building or facade must resist due to wind pressure and suction. Using standards like BS EN 1991-1-4, we assess site-specific factors (location, height, terrain, exposure, building shape) to produce design wind pressures, critical for curtain walling, cladding, glazing and bracket design.
Costs depend on project scale, complexity and deliverables required. Simple load checks or small-area surveys may start from a few hundred pounds, while full facade wind engineering packages or multi-storey structural assessments are higher. We provide clear, fixed-price quotations after an initial discussion of scope.
Across the UK, fees for professional structural calculations and commercial surveys vary widely by scope. PDK delivers transparent pricing with no hidden extras, ensuring you understand costs before proceeding.
Key factors include project size, complexity (e.g., tall facades, high wind exposure, bespoke systems), number of load cases, level of survey detail required, and whether full certification reports are needed. We focus on delivering only what is necessary for approval and buildability.
We specialise in commercial facades, curtain walling, rainscreen cladding, windows/doors, bracketry and support steelwork from systems such as Kawneer, Schüco, Reynaers, Senior, Sapa and more. We also support roof extensions, structural alterations, industrial units and refurbishments across various sectors.
Yes, most facade changes (new cladding, glazing, brackets, extensions) require structural calculations to demonstrate compliance with building regulations, particularly Part A (Structure) and wind loading standards. We produce packages accepted by local authorities and Approved Inspectors.
Yes. We routinely carry out site-specific wind load calculations and produce pressures tailored to manufacturer requirements for rainscreen cladding, curtain walling, soffits, canopies and other elements, ensuring systems are correctly specified and certified.
Extremely accurate, even millimetre-level errors can affect bracket positioning, glazing fits, tolerances and structural interfaces. We use modern survey equipment and cross-check methods to deliver survey data you can trust for fabrication and installation.
Why Choose PDK Project Engineering?
Your project deserves engineering that goes beyond minimum compliance.
Since 1995, we’ve provided trusted commercial surveys, structural calculations, commercial calculations and wind load calculator services to contractors, fabricators, architects and developers across the Wirral, Chester, Ellesmere Port, Liverpool City Region and throughout the UK.
Working independently of contractors and suppliers, our engineering advice is always impartial and focused on what is safest, most compliant and most economical for your specific project. With rigorous attention to detail, clear reporting, fixed-price transparency and decades of facade experience, we deliver certainty you can build on.