Every steel building should be designed for its specific location, dimensions and use — taking account of the wind, snow and other loads that may act on the structure.
STRUCTURAL DESIGN
Designed for Your Site. Not Just Your Building Size.
Two steel buildings with the same dimensions may require different structural specifications depending on where they are located and how they will be used.
Wind exposure, snow loading, altitude, building dimensions, openings and site conditions can all influence the structural design.
That’s why ESB buildings are designed around the requirements of the individual project rather than simply selecting a standard frame based on width and length.
DESIGN LOADS
What Loads Does a Steel Building Need to Resist?
A steel building must safely resist the forces that may act on it throughout its life. The structural design considers a combination of loads rather than looking at any one factor in isolation.
WIND LOADS
Wind Pressure & Suction
Wind can create pressure on walls and roofs as well as suction and uplift forces. Location, exposure, building height and openings all influence the loads acting on the structure.
SNOW LOADS
Snow on the Roof
Roof snow loading varies by location, altitude and roof geometry. The structure must be designed for the appropriate snow loads for the project site.
BUILDING LOADS
The Building Itself
The weight of the steel frame, cladding and other permanent components forms part of the structural loading considered during design.
PROJECT SPECIFIC
Use, Openings & Configuration
Large doors, open elevations, canopies, lean-tos and other project-specific features can change how forces are transferred through the building.
DESIGN FEATURES
Openings, Canopies & Solar Panels
Large or dominant openings, canopies, solar panels and other additions can affect the loads acting on a building and how those forces are transferred through the structure. These should be considered as part of the building design from the outset.
READY TO GET STARTED?
Planning a Steel Building?
Tell us the size, location and intended use and we’ll help you develop the right building specification.
The same building can experience very different structural loads depending on where it is located. Site altitude, regional wind conditions, coastal exposure and snow loading can all influence the final design.
LOCATION
Postcode & Site Position
The project location helps establish the regional loading conditions that apply to the building.
COASTAL EXPOSURE
Distance from the Coast
Buildings closer to the coastline can be exposed to more severe wind conditions and may require additional engineering checks.
ALTITUDE
Height Above Sea Level
Higher sites can experience increased wind and snow loading, which may affect the structural specification.
LOCAL LOADS
Wind & Snow Zones Regional wind and snow data help establish the design loads used during structural assessment.
SITE LOAD CALCULATOR
Check Your Steel Building Site Loads
Enter your UK postcode to check the indicative wind, snow, altitude and coastal exposure for your site, together with the likelihood of further structural engineering checks.
ESB UK Steel Building Site Loading Calculator – V1.3
SITE LOADING LOOKUP
UK Steel Building Site Loading Calculator
Enter a UK postcode for an indicative site-loading estimate covering altitude, characteristic snow load and fundamental basic wind velocity.
V1.3 prototype — for ESB validation before public release.
Elevation lookup unavailable.
Enter the approximate site altitude in metres to continue.
Altitude
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metres above sea level
Wind Zone
—
m/s estimated map band
Site Wind Velocity
—
m/s estimated fundamental basic
Wind Pressure
—
kN/m² basic velocity
Snow Zone
—
estimated UK zone
Snow Load
—
kN/m² characteristic
Distance From Coast
—
estimated
Additional structural design features
Select any known features. These can materially affect structural loading and should be identified at quotation/design stage.
LIKELIHOOD OF FURTHER ENGINEERING CHECKS ON STRUCTURE
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What this result means This calculator is a preliminary barometer for the likelihood that site conditions or additional design features will require further engineering review after the initial ESB quotation. It is not a structural design calculation.
Regional estimate confidence —
Important: Indicative preliminary site information only. Final wind, snow, exposure, terrain, building geometry, dominant openings, canopies, solar loading and all structural design requirements must be checked and confirmed by a suitably qualified engineer for the specific project. Do not use this calculator as a substitute for structural design or Building Regulations compliance.
Postcode geocoding uses UK postcode data. Site elevation is obtained automatically where available, with a regional terrain fallback and optional manual refinement. Loading outputs are indicative and remain subject to project-specific engineering verification.
STRUCTURAL REQUIREMENTS
What Happens When Site Loads Increase?
Higher wind or snow loads don’t necessarily mean a project becomes difficult — but they can influence how the building needs to be engineered.
FRAME SECTIONS
Heavier Structural Members
Higher design loads may require larger or heavier structural sections to provide the necessary strength and stability.
BRACING
Additional Bracing
The position, quantity or specification of structural bracing may change where greater loads need to be resisted.
CONNECTIONS
Connections & Hold-Downs
Higher forces can affect connection details, base fixings and hold-down requirements between the steel frame and foundations.
ENGINEERING
Additional Design Checks
Sites outside typical design parameters may require further structural assessment before the final building specification is confirmed.
BUILDING DESIGN
It’s Not Just About the Location
Site loading is only part of the structural design. The building’s dimensions, openings and intended use can also significantly influence how loads act on the structure.
BUILDING SIZE & HEIGHT
Wider spans, taller buildings and longer bay arrangements can increase structural demands and influence the frame specification.
DOMINANT OPENINGS
Large or multiple openings can significantly change the way wind pressure acts on a building and may require additional structural consideration.
CANOPIES & ATTACHED STRUCTURES
Canopies, lean-tos and other projecting or attached structures can introduce additional loads that need to be considered during design.
SOLAR PANELS & ADDITIONAL LOADS
Solar panels, roof-mounted equipment, mezzanine floors and other additional loads should be identified before the structural design is finalised.
SITE-SPECIFIC ENGINEERING
From Site Loads to Structural Design
The site information and building specification are considered together when the structure is engineered. This allows the frame, bracing and connections to be designed around the actual requirements of the project rather than relying on a one-size-fits-all building specification.
SITE INFORMATION
Establish the Design Conditions
Location, altitude, wind and snow conditions are considered alongside the proposed building dimensions and use.
STRUCTURAL ASSESSMENT
Engineer the Building
The frame, bracing, openings and connections are assessed against the loads that may act on the structure.
DESIGN & DRAWINGS
Confirm the Final Specification
The structural design is developed into the project drawings and engineering information required for manufacture.
Where site conditions or additional loads require a change from the initial specification, these can be identified and addressed before manufacture.
ENGINEERING INFORMATION
Designed, Checked & Documented
Once the building specification and site requirements are confirmed, the structural design is supported by the drawings and engineering information produced for the project.
STRUCTURAL CALCULATIONS
Engineering Calculations
Structural calculations can be provided to support the building design and demonstrate how the principal loads have been considered.
GENERAL ARRANGEMENT DRAWINGS
Project Drawings
General Arrangement drawings set out the building dimensions, frame positions, openings and principal structural arrangement for approval.
BASE INFORMATION
Foundation & Base Requirements
Relevant structural reactions and base information can be used to help develop the appropriate foundation solution for the project.
Tell Us About Anything That Could Affect the Structure
The more we know at the start of the project, the better we can match the initial building specification to the eventual structural requirements.
Please tell us about:
Large or dominant door openings Canopies, lean-tos or attached structures Solar panels or planned roof-mounted equipment Mezzanine floors or suspended loads Cranes or lifting equipment Open or partially open elevations Any unusual site exposure or known local conditions
Providing this information early helps reduce the likelihood of structural changes being identified later in the design and engineering process.
PLANNING A STEEL BUILDING
Start With the Right Structural Specification
Tell us about your building, site location and any additional design requirements. We’ll use the project information to help establish the appropriate specification before the building moves into structural design.
