--- title: Architectural Metalwork & Structural Steel | Koyda Ltd url: https://www.koyda.com/ description: Balustrades, balconies, staircases, plant screens and structural steel for main contractors, independent builders and homeowners in London, Surrey and the South East. last_modified: 2026-10-11 publisher: Koyda Ltd, Units 27–29 Jesmor Farm, St Piers Lane, Lingfield, Surrey RH7 6PN. 07753 213617, joe@koyda.com --- Architectural metalwork · Structural steel # Architectural Metalwork & Structural Steel for Main Contractors We design, fabricate and install metalwork and steel for main contractors, independent builders and homeowners across London, Surrey and the South East. [Send drawings for a price →](https://www.koyda.com/contact-us/)[Our services](https://www.koyda.com/services/) Feature stairsWoolwich Civic Centre * **Since 2005**Incorporated * **Design → Install**One accountable package * **SolidWorks · Revit · AutoCAD**In-house 3D design and BIM * **Gateway 2**Design information for HRBs Who we work for ## Main contractors, independent builders and homeowners. Large schemes, small builds and single pieces get the same design, workshop and site team. ### For main contractors We take each package from design through to installation, or come in at the stage you need us. * One accountable package, from design and engineering through fabrication to installation * Early input to resolve interfaces and value engineer before anything is made * Drawings and design information for Gateway 2 on higher-risk buildings * Clear handover information for O&M manuals and the golden thread [Services for contractors →](https://www.koyda.com/services/) ### For independent builders and homeowners Homes, gardens and extensions, for homeowners and the builders working on them. Surveyed, drawn up and made by the same team as our commercial work. * Gates, railings and security gates * Staircases, including spiral and helical * Balustrades and handrails * Canopies and pergolas * Mezzanine floors and structural steel for extensions * Modular garden rooms, including studios and sauna pods * Bespoke one-off commissions, made to your design or ours [Home & garden work →](https://www.koyda.com/sectors/domestic/) 01 — Services ## What we do Seven core packages, plus bespoke one-off commissions. Take the whole package, from design to installation, or just the part you need. [01 / 07 ### Glass Balustrades Frameless, framed and post-and-rail glass for balconies, terraces, stairs and voids. View service](https://www.koyda.com/services/glass-balustrades/)[02 / 07 ### Metal Balustrades & Handrails Steel, stainless steel and aluminium balustrades and handrails. View service](https://www.koyda.com/services/metal-balustrades-handrails/)[03 / 07 ### Balconies Aluminium bolt-on, inset and Juliet balconies. View service](https://www.koyda.com/services/balconies/)[04 / 07 ### Staircases Feature, spiral, helical and external steel stairs. View service](https://www.koyda.com/services/staircases/)[KOY-05Plant Screens 05 / 07 ### Plant Screens Visual screening for rooftop plant in bars or louvres. View service](https://www.koyda.com/services/plant-screens/)[06 / 07 ### Structural Steel Beams, frames, secondary steelwork and roof plant steel. View service](https://www.koyda.com/services/structural-steel/)[07 / 07 ### Design & Engineering 3D modelling in SolidWorks, BIM coordination in Revit, 2D drawings in AutoCAD, and Gateway 2 information. View service](https://www.koyda.com/services/design-engineering-gateway-2-bim/)[Homes & builders ### Homes & gardens Gates, railings, stairs, balustrades, canopies and steel for extensions. Home & garden work](https://www.koyda.com/sectors/domestic/) Also ### Bespoke one-off commissions Individual pieces made to your design or ours. Branded steps, decorative fretwork, feature pieces and special parts, designed in SolidWorks and made in our workshop. [See examples →](https://www.koyda.com/gallery-of-works/)[Tell us your idea](mailto:joe@koyda.com?subject=Bespoke%20commission) Free tool ## Steel weight calculator Pick a beam, column, channel, angle or hollow section, enter the length and quantity, and get the weight. Add your own rate per tonne for a material cost. Plate and flat bar too. [Open the calculator →](https://www.koyda.com/steel-weight-calculator/)[Steel section tables](https://www.koyda.com/steel-section-tables/) Section : 203 × 133 × 25 UB Length × qty : 6 m × 4 Weight : 602.4 kg 02 — How we work ## Modelled, made and fitted by one team We model every element in SolidWorks, coordinate with the design team's BIM model in Revit and issue 2D drawings in AutoCAD, along with the information contractors need for Gateway 2. This reduces clashes and RFIs, and the metalwork fits on site. 1. 01 ### Design We survey, model each element in SolidWorks, coordinate in Revit where there is a BIM model, and issue drawings for approval before we cut steel. 2. 02 ### Fabricate Our designers work directly with our workshop, so what we model is what we make. CNC and laser-cutting files come straight from the model. 3. 03 ### Install We install on site and hand over the information needed for O&M manuals and the golden thread. 03 — Selected projects ## Recent work A few of the schemes we have worked on. ### [Abbey Place, Woolwich](https://www.koyda.com/projects/abbey-place-woolwich/) Scope : Stacking Juliet balconies Sector : Residential ### [Woolwich Civic Centre](https://www.koyda.com/projects/woolwich-civic-centre-stairs/) Scope : Feature stairs Sector : Public / civic ### [Imperial College London](https://www.koyda.com/projects/imperial-college-staircases/) Scope : Staircases Sector : Education ### [Unilever campus, Kingston](https://www.koyda.com/projects/unilever-woodland-walkway/) Scope : Woodland walkway Sector : Commercial ### [Canary Wharf, London](https://www.koyda.com/projects/canary-wharf-handrails/) Scope : Stainless steel handrails Sector : Commercial ### [Peninsula Hotel](https://www.koyda.com/projects/peninsula-hotel/) Scope : Structural door supports; chandelier access panels Sector : Hospitality [All projects →](https://www.koyda.com/projects/)[Gallery](https://www.koyda.com/gallery-of-works/) Sectors ## Where our work goes * [Residential & high-rise](https://www.koyda.com/sectors/residential-high-rise/) * [Commercial & hospitality](https://www.koyda.com/sectors/commercial/) * [Education](https://www.koyda.com/sectors/education/) * [Healthcare](https://www.koyda.com/sectors/healthcare/) * [Homes & gardens](https://www.koyda.com/sectors/domestic/) Guides and Resources ## Guides and Resources Free tools and short, sourced guides to the standards behind our work. * [Steel weight calculator](https://www.koyda.com/steel-weight-calculator/) * [Steel section tables](https://www.koyda.com/steel-section-tables/) * [Handrail and balustrade regulations](https://www.koyda.com/guides/handrail-and-balustrade-regulations/) * [Stair regulations and rise and going calculator](https://www.koyda.com/guides/stair-regulations/) * [RAL colour chart for metalwork](https://www.koyda.com/guides/ral-colour-chart/) * [Galvanising vs powder coating vs duplex](https://www.koyda.com/guides/galvanising-powder-coating-duplex/) * [Balustrade heights and loads](https://www.koyda.com/guides/balustrade-heights-and-loads/) * [Glass balustrade specification](https://www.koyda.com/guides/glass-balustrade-specification/) * [BS EN 1090 and execution classes](https://www.koyda.com/guides/bs-en-1090-execution-classes/) * [Gateway 2 for metalwork packages](https://www.koyda.com/guides/gateway-2-metalwork-packages/) * [Specifying rooftop plant screens](https://www.koyda.com/guides/plant-screens-specification/) * [S275 vs S355 steel grades, and RSJ vs UB](https://www.koyda.com/guides/s275-vs-s355-steel-grades/) * [Plate and flat bar weight tables, sheet gauges](https://www.koyda.com/guides/plate-and-flat-bar-weights/) * [Bolt sizes, property classes and clearance holes](https://www.koyda.com/guides/bolt-sizes-grades-and-holes/) * [Welding symbols explained (ISO 2553)](https://www.koyda.com/guides/welding-symbols/) * [Glass balustrade thickness and fixing](https://www.koyda.com/guides/glass-balustrade-thickness-and-fixing/) * [Automated gate safety basics](https://www.koyda.com/guides/automated-gate-safety/) * [Intumescent paint and fire protection for steel](https://www.koyda.com/guides/intumescent-paint-fire-protection/) * [Interactive Welding Guide](https://www.koyda.com/guides/welding-quick-guide/) * [A–Z glossary of metalwork and steelwork terms](https://www.koyda.com/guides/glossary/) [All guides and resources →](https://www.koyda.com/guides/) 04 — Compliance ## Accreditations and insurance Certificates and insurance details are available on request from joe@koyda.com. Accredited**Constructionline Silver**