Industrial building structural engineering
Industrial buildings carry heavy plant, moving loads and services that most commercial sheds never see. We design the frame, foundations and floors that keep production running safely, for developers and operators across the UK.
Do you design for overhead cranes?
Yes. We design the crane beams, columns and bracing for the vertical wheel loads, horizontal surge and end forces the crane supplier specifies, and we keep the beam deflection inside the limits that stop the rail wandering. We coordinate the holding-down and rail details with the crane manufacturer.
Designing the frame for real industrial loads
An industrial building is not just a covered space. It usually carries overhead cranes, mezzanines, process pipework, dust extraction, heavy roof-mounted plant and sometimes vibrating machinery bolted straight to the floor. Each of these adds load and, more awkwardly, moving and repeated load that the primary steelwork has to be designed for. We set out a steel frame, most often a portal or a braced multi-bay arrangement, that gathers the roof, wind and crane forces and carries them cleanly down to the foundations.
Crane loads in particular change the design. A gantry crane applies vertical wheel loads, horizontal surge from acceleration and braking, and end-carriage forces that the columns and crane beams must resist without excessive sway. We check the deflection of crane beams to the tighter limits that keep the rail true, size the columns for combined axial and bending, and design the bracing so the whole frame stays stable while the crane is working at the end of its travel.
Floors, foundations and heavy plant
Industrial ground floors take a beating. Fork-lift wheel loads, racking leg loads, point loads under machinery and general uniformly distributed loading all have to be carried by the slab and passed into the ground. We design the ground-bearing or, where settlement matters, the pile-supported slab to suit the plant schedule, and we detail construction joints, thickenings and isolation details where vibrating machinery would otherwise crack the surrounding floor.
Foundations follow the ground and the column reactions. Portal frame feet generate large horizontal thrust as well as vertical load, so we design pad foundations with tie beams, or a suitably restrained slab, to take that thrust without spreading. Where machinery is sensitive to vibration or generates its own, we design isolated inertia bases sized to keep dynamic movement inside the manufacturer's limits.
Wind, snow and the building envelope
Large single-storey industrial buildings are dominated by wind. We calculate wind actions to BS EN 1991-1-4 and its UK National Annex, working out the peak velocity pressure for the site, the pressure coefficients across walls and roof, and the uplift that governs the roof sheeting, purlins and holding-down bolts. Snow load to BS EN 1991-1-3 matters too, especially drifting against parapets, plant and adjacent taller bays, which can double the local load.
The envelope is part of the structure. Purlins and side rails brace the frame as well as carry the cladding, so we coordinate the cladding system, the secondary steel and the bracing together. We also check the frame for the accidental and fire cases that Approved Document B and the Eurocodes require, so that in a fire the walls fall inwards or stay standing as intended rather than collapsing onto a boundary.
What we check.
The points our calculations resolve for a project like this.
- Overhead crane wheel, surge and end-carriage loads on columns and crane beams
- Deflection limits on crane and gantry beams to keep rails true
- Heavy floor slab design for fork-lift, racking and point loads
- Portal frame foot thrust and tie or slab restraint at foundation level
- Wind and snow actions to BS EN 1991-1-4 and 1991-1-3, including drifting
- Vibration isolation for sensitive or dynamic machinery
From enquiry to sign-off.
Enquiry
Send drawings or describe the problem. We confirm the scope, the deliverables and a target timescale.
Information
We agree the survey, drawings or data we need and any site access required.
Engineering
Design, calculation or assessment to the relevant Eurocodes and UK National Annex.
Issue
A clear, defensible report or set of calculations, with assumptions and limitations stated.
Common questions
Do you design for overhead cranes?
Yes. We design the crane beams, columns and bracing for the vertical wheel loads, horizontal surge and end forces the crane supplier specifies, and we keep the beam deflection inside the limits that stop the rail wandering. We coordinate the holding-down and rail details with the crane manufacturer.
Can you upgrade an existing industrial frame for new plant?
Yes. We survey the existing steelwork, check the current members against the new machinery and floor loads, and design strengthening or new supports only where the numbers require it. That usually saves demolishing and rebuilding a frame that is largely sound.
How do you handle vibrating machinery?
We design isolated bases or inertia blocks sized so the dynamic movement stays inside the machine maker's limits, and we detail isolation joints so vibration does not crack the surrounding slab or carry into the frame.
Do you work outside the UK?
Yes. We prepare calculations and reports for clients across the UK, delivered remotely, and we arrange site visits by region where an inspection or survey is needed.
Related in commercial, industrial & agricultural structural engineering.
Tell us what you are building.
Send the drawings or describe the project. We confirm scope, deliverables and a realistic timescale.
Start a project