Category: Plugin

“Voussoir” Revit Add-in

The Voussoir for Autodesk® Revit® plugin is designed to create stereotomic vaults directly within the BIM environment. Combining advanced geometric logic with principles inspired by traditional masonry construction, the plugin enables users to generate, edit, and export vault systems composed of voussoirs and springers in a fully parametric manner.

The tool integrates seamlessly into the Revit workflow by using preconfigured families (included with the plugin) that are automatically instantiated and organized into model groups to form stereotomic vaults.

Key Features:

Parametric Vault Generation:

Generate stereotomic vaults by selecting two opposite walls. The vault is created using default parameters, and all geometric properties (profile type, height, thickness, and subdivision patterns) can then be fully customized through the Edit functionality.

Native Revit Workflow Integration:

The plugin relies on dedicated voussoir and springer families to ensure geometric consistency and complete compatibility with standard Revit modeling practices.

Export Functionality:

Export the resulting vault geometry to external file formats (OBJ, STL, and others), supporting downstream workflows such as analysis, fabrication, or visualization.

Applications:

Advanced BIM Modeling:

Incorporate parametric stereotomic vaults directly into Revit projects without the need for external modeling tools.

Geometric & Structural Analysis:

Export detailed vault geometry for use in external simulation, optimization, or structural assessment tools.

Digital Fabrication Workflows:

Prepare voussoir models for CNC cutting, 3D printing, documentation, or visualization through supported export formats.

The Voussoir plugin offers an intuitive interface, robust parametric logic, and seamless integration into the Revit ecosystem, enabling AEC professionals to model stereotomic vault systems accurately, efficiently, and fully aligned with BIM standards.

Download through Autodesk Store.

October 21, 2025

“Voussoir” Grasshopper Plugin

Voussoir is a Grasshopper plugin for Rhinoceros 3D that enables the generation of stereotomic vault geometries from user-defined inputs. Developed as a tool for digital exploration of stone vault construction, it combines parametric modeling with geometric logic inspired by traditional masonry techniques.

The plugin is conceived with a modular architecture, allowing future integration of additional stereotomic approaches and ensuring that all components can seamlessly interact. Stay tuned for upcoming developments.

Preferred Installation: Open Rhino’s PackageManager, search for “voussoir” and install.

Features

Generate voussoir-based vault systems from curves or surfaces.
Control key geometric parameters, such as springer lines and intrados curvature.
Automatically subdivide vault surfaces into voussoirs with customizable dimensions.
Export vault elements as BREPs for further analysis, fabrication, or visualization.
Designed to integrate seamlessly within parametric workflows in Rhino and Grasshopper.

Use Cases

Historical reconstruction and digital archaeology.
Architectural design inspired by stereotomy and stone vaulting.
Educational applications in architectural geometry and design computation.

Technical Information

Compatible with Rhino 8 and Grasshopper.
Outputs clean and organized data trees for downstream use.
Requires no external dependencies.

Disclaimer: This plugin is intended solely for geometric design exploration. It does not perform structural analysis or validation, and results should not be used for engineering assessment.

Core Geometry

Barrel Vault Base Surface

Nickname: BVSrf
Creates the base surface for the creation of a barrel vault

Input Name	ID	Description	Type	Default Values
Input Lines	SpringerLines	Two non intersecting lines	Curve	—
Vault Height	VaultHeight	Arc’s height.	Float	2.00
Arc Selection	VaultProfile	Right-click to select type of curve. 0: Parabola, 1: Arc, 2: Catenary. Or input one of the above integers	Integer	2

Output Name	ID	Description	Type
Vault Surface	VS	The vault surface created by lofting both arcs	Surface
Springer Lines	SL	The two horizontal lines (remaining sides).	Line
Vault Arcs	VA	The two generated arcs.	Curve

Barrel Vault Division – UV Grid

Nickname: BVDivG
Divides a vault defined by two arcs into spanwise and lengthwise voussoirs.

Input Name	ID	Description	Type	Default Values
Vault Surface	VaultSurface	The vault surface created by lofting both arcs	Surface	—
Transversal Divisions	TransversalDivisions	Number of voussoirs in the vault’s span	Integer	12
Longitudinal divisions	LongitudinalDivisions	Number of voussoirs in the vault’s length	Integer	8

Output Name	ID	Description	Type
Intrados Planes	IP	Intrados planar vault panels	Plane
Division planes	DP	Planes of each Voussoir Contact Surface	Plane
Boundaries	B	Voussoir Boundaries (Indexes of Division Planes)	String
Transversal planes	TP	Planes at each length division	Plane
Longitudinal planes	LP	Planes at each span division	Plane

Create Voussoirs

Nickname: BVouss
Creates Voussoirs defined by division planes

Input Name	ID	Description	Type	Default Values
Intrados Planes	IntradosPlanes	Intrados planar vault panels	Plane	—
Division planes	DivisionPlanes	Planes of each Voussoir Contact Surface	Plane	—
Boundaries	Boundaries	Voussoir Boundaries (Indexes of Division Planes)	String	—
Thickness	Thickness	Voussoir Thickness	Float	0.25

Output Name	ID	Description	Type
Voussoirs	V	Voussoir Blocks	Brep
Intrados	I	Intrados Surfaces	Surface
Extrados	E	Extrados Surfaces	Surface
Contact Surfaces	CS	Voussoir contact surfaces	Surface

Springers

Springer – Triangle

Nickname: SprTri
Create a simple triangular Springer

Input Name	ID	Description	Type	Default Values
Vault Surface	VaultSurface	The vault surface created by lofting both arcs	Surface	—
Springer Line	SpringerLine	List of base lines to create vault springers	Curve	—
Voussoirs	Voussoirs	Voussoirs to analyse	Brep	—
Transversal Planes	TransversalPlanes	Planes at each span division	Plane	—

Output Name	ID	Description	Type
Springers	S	Finished Springers	Brep
Voussoirs	V	Non transformed voussoirs	Brep

Springer – Trapezoid

Nickname: SprT
Create a simple trapezoid Springer

Input Name	ID	Description	Type	Default Values
Vault Surface	VaultSurface	The vault surface created by lofting both arcs	Surface	—
Springer Line	SpringerLine	List of base lines to create vault springers	Curve	—
Voussoirs	Voussoirs	Voussoirs to analyse	Brep	—
Transversal Planes	TransversalPlanes	Planes at each span division	Plane	—

Output Name	ID	Description	Type
Springers	S	Finished Springers	Brep
Voussoirs	V	Non transformed voussoirs	Brep

Springer – Wall

Nickname: SprW
Creates a Springer based on the voussoirs closest to the springer line

Input Name	ID	Description	Type	Default Values
Vault Surface	VaultSurface	The vault surface created by lofting both arcs	Surface	—
Springer Line	SpringerLine	List of base lines to create vault springers	Curve	—
Voussoirs	Voussoirs	Voussoirs to analyse	Brep	—
Transversal Planes	TransversalPlanes	Planes at each span division	Plane	—
Springer Width	SpringerWidth	Distance perpendicular to springer line	Float	0.25

Output Name	ID	Description	Type
Springers	S	Finished Springers	Brep
Voussoirs	V	Non transformed voussoirs	Brep

Wootils

Arc by Height

Nickname: ArcH
Create an upward arc between two points and a given height (max radius constrained by point distance)

Input Name	ID	Description	Type	Default Values
Start	A	Start point of the arc.	Point	—
End	B	End point of the arc.	Point	—
Height	H	Height of the arc.	Float	2.00

Output Name	ID	Description	Type
Arc	C	Arc curve	Curve

Catenary by Height

Nickname: CatH
Create an upward catenary between two points and a given height

Input Name	ID	Description	Type	Default Values
Start	A	Start point of the catenary.	Point	—
End	B	End point of the catenary.	Point	—
Height	H	Rise (height) of the catenary.	Float	2.00

Output Name	ID	Description	Type
Catenary	C	Catenary curve	Curve

Parabola by Height

Nickname: ParH
Create an upward parabola between two points and a given height

Input Name	ID	Description	Type	Default Values
Start	A	Start point of the parabola.	Point	—
End	B	End point of the parabola.	Point	—
Height	H	Height of the parabola.	Float	2.00

Output Name	ID	Description	Type
Parabola	C	Parabola curve	Curve

May 29, 2025

Category: Plugin

“Voussoir” Revit Add-in

“Voussoir” Grasshopper Plugin

Core Geometry

Springers

Wootils