Create Accurate Straight and Curved Stairs with NT Stair
NT Stair is a free SketchUp stair plugin created by Nice Tower for generating practical stair geometry from architectural dimensions. Build straight and curved stairs with controlled risers, treads, slabs and side supports while reducing repetitive manual modeling.
Generate a complete stair from clear architectural dimensions
Modeling every tread and riser manually takes time and makes later dimension changes difficult. NT Stair converts the main architectural inputs into organized stair geometry. This example shows how the plugin simplifies the first stage of stair creation and keeps parameters easy to understand.
A practical NT Stair tool for professional SketchUp modeling
Stair modeling requires accurate relationships between total height, riser count, tread depth, width and structural support. NT Stair helps architects, interior designers and students generate organized stair geometry from these essential inputs. It supports straight and curved workflows with practical configurations for conceptual models, design development and presentations.
Straight stairs
Generate organized straight flights from practical dimensions.
Curved stairs
Create stair geometry along a suitable curved guide.
Riser control
Define height and count for consistent vertical circulation.
Tread control
Set useful tread dimensions for the intended layout.
Structural options
Choose waist-slab or side-support configurations.
Free RBZ installer
Install through SketchUp Extension Manager at no cost.
How to use NT Stair in SketchUp
Prepare clean, organized geometry before starting. A clear selection and suitable model structure produce more predictable results and reduce later cleanup.
Set the layout
Choose a straight or curved stair workflow.
Enter dimensions
Define width, height, tread and riser requirements.
Choose a style
Select the practical structural configuration.
Generate and review
Create the stair, inspect clearances and refine it.
Explore practical stair structures without rebuilding the model
Different projects need different structural and visual stair solutions. NT Stair provides practical options for waist slabs and side-supported configurations, allowing you to compare alternatives with fewer modeling steps. This demonstration shows how the plugin speeds up design development while keeping the result editable.
Create curved stairs with a faster controlled workflow
Curved stairs normally require careful division, rotation and alignment of many elements. NT Stair automates much of that repetitive work from a defined curve and stair dimensions. This final example demonstrates how the plugin makes curved stair modeling more approachable for architectural projects.
Practical ways to use NT Stair
Residential stairs
Develop straight and curved stairs for houses and apartments.
Commercial circulation
Create stair concepts for offices, shops and public interiors.
Interior visualization
Build presentation-ready stair geometry for scenes.
Design studies
Compare stair styles and dimensions during development.
Install the RBZ in minutes
- Download the NT Stair RBZ file.
- Open SketchUp and choose Extensions → Extension Manager.
- Click Install Extension and select the downloaded RBZ.
- Enable the NT Stair toolbar from View → Toolbars.
- Restart SketchUp if the toolbar does not appear.
Compatibility and requirements
- Plugin: NT Stair
- Version: 1.0.0
- File format: RBZ
- Price: Free
- Best for: Architecture, interiors and 3D modeling
- Recommended setup: Confirmed floor height, stair width and clean plan geometry
More tools and training for better SketchUp results
Combine NT Stair with professional training, AI-assisted modeling and advanced extensions. Use NT Array to distribute balusters and NT UpSweep to create upright handrail profiles.
NT Stair FAQ
Is NT Stair free?
Yes. Version 1.0.0 is available as a free RBZ download.
Can it create curved stairs?
Yes, it supports practical straight and curved workflows.
Which dimensions should I prepare?
Confirm floor height, stair width, tread depth and riser dimensions.
Does it include structural options?
It includes waist-slab and side-supported configurations.
How do I install it?
Open Extension Manager and install the downloaded NT Stair RBZ.
Generate your next SketchUp stair faster
Download NT Stair free and complete this modeling workflow with fewer repetitive steps.