How we use the terms
| Question | Helical / curved | Spiral / centre-column |
|---|---|---|
| What is the starting form? | A broader flowing curve, often around an open well. | Treads arranged around a central support. |
| What defines the footprint? | The curve, well, usable width and landing arrangement. | The central support, tread arrangement and overall turning envelope. |
| What should be reviewed? | Curve continuity, support locations, side geometry and available opening. | Walking route, headroom, entry and exit, support and suitability for use. |
| Can a photograph fix the specification? | No. Site dimensions, structural information and approved drawings are needed. | No. A compact appearance does not establish dimensions or local acceptance. |
Start with the building and its users
Provide the opening and finished floor-to-floor height, then mark where the stair should start and finish. Describe the intended use: a private home, hotel, retail space or another setting. State whether it is the principal route or an additional connection.
Consider who will use the staircase and what must be carried through it. Ask the local project designer to review the proposed layout, clearances, guarding and intended use against the applicable project requirements.
Send a reference image with a plan
Tell us what you like about the reference: the curve, open well, tread shape, balustrade, colour or apparent lightness. These are different design decisions. A champagne-coloured curved side, for example, does not establish a particular metal alloy or coating.
Photos explain appearance. Plans and sections explain the site. The fabrication drawing brings these together with the support system and connections.
What to send for an initial discussion
Location and use
Country, city, building use and the role of the staircase.
Space and levels
Floor plan, opening dimensions, finished floor levels and proposed entry and exit.
Design and structure
Reference images, preferred finishes and available information about supporting walls, slabs or steel.
Continue planning