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    CLT Floor Ambient
  • 2
    CLT Floor Fire
  • 3
    CLT Floor Point Load
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    CLT Wall Ambient
  • 5
    CLT Wall Fire
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    CLT Beam
  • 7
    CLT Shear Wall
  • 8
    GLT Beam
  • 9
    GLT Column
  • 10
    GLT Beam Penetration
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    Member Design Calculator
CLT Floor Ambient​

The CLT Floor Ambient Calculator enables the fast & efficient design of CLT floors under ambient conditions. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Vibration methods include FP Innovations, Modified Eurocode 5 & Draft Eurocode 5
  • Users can choose between default or manual load combinations, plus input design forces
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for shear force and bending moment
  • Service verification for deflection and vibration

Learn More
CLT Floor Fire​

The CLT Floor Ambient Calculator enables the fast & efficient design of CLT floors under ambient conditions. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Vibration methods include FP Innovations, Modified Eurocode 5 & Draft Eurocode 5
  • Users can choose between default or manual load combinations, plus input design forces
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for shear force and bending moment
  • Service verification for deflection and vibration

Learn More
 CLT Floor Point Load

Designing CLT floors exposed to concentrated loads can be designed quickly and effectively with the help of the CLT Floor Ambient Point Load Calculator. This calculator has the following features:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or preferred partner supplier
  • Dynamic interactive image for a point load application
  • Effective width and load propagation calculation according to pro:Holz
  • Users can choose between default or manual load combinations, plus input design forces
  • Analytical method for panel properties includes, shear analogy, gamma , and extended gamma
  • Strength verification for shear force and bending moment
  • Service verification for deflection

Learn More
CLT Wall Ambient

The CLT Wall Ambient Calculator enables the fast & efficient design of CLT walls under ambient conditions. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Users can choose between default or manual load combinations, plus input design forces
  • Platform and Balloon type of construction are available
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for axial force, bending moment, and combined effect

CLT Wall Fire

The CLT Wall Fire Calculator enables a quick and effective post fire CLT wall design. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • EN 1995-1-2:2020 used for charring calculation
  • Users can choose between default or manual load combinations, plus input design forces
  • Platform and Balloon type of construction are available
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for axial force, bending moment, and combined effect

CLT Beam

The CLT Beam calculator can be used for quick and effective design of a beam made of CLT material. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • FPinnoviation and pro:Holz manual used for In-plane shear study
  • Only simply supported beams are covered
  • Users can choose between default or manual load combinations, plus input design forces
  • Strength verification for shear force and bending moment
  • Service verification for deflection

CLT Shear Wall

CLT Toolbox has introduced a powerful software solution designed specifically for the efficient design of CLT shear walls. Features of this software include:

  • Ability to design CLT shear walls using three different design codes: EN 1995:2004, AS 1720:2010, and NZS AS 1720:2022.
  • Comprehensive strength verifications for both CLT members and connectors.
  • Evaluation of compression, tension, and shear forces at the base of the wall or connection level, informed by cutting-edge research from Casagrande et al. (2016), Wallner-Novak et al. (2013), Tomasi (2014), Pei et al. (2012), and Reynolds et al. (2017).
  • In-plane shear verifications conducted according to the Cross-Laminated Timber Design Manual Volume 1 (ProHolz Austria) and the Canadian CLT Handbook, 2019.
  • Lateral deformations of CLT shear walls computed using methodologies from ProHolz and FP Innovations Canada.
  • Explicit buckling checks exclusive to EN 1995:2004, ensuring the stability and safety of the design.

GLT Beam

The GLT Beam Calculator simplifies the design of a structural beam made from GLT material. This calculator’s features include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Support stiffness check for floor vibration
  • EN 1995-1-2:2004 used for charring calculation
  • Design for ambient and fire condition in one
  • Users can choose between default or manual load combinations, plus input design forces
  • Strength verification for shear force and bending moment
  • Service verification for deflection and vibration

GLT Column

A GLT column can be designed efficiently with the assist of the GLT Column Calculator. The features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • EN 1995-1-2:2004 used for charring calculation
  • Design for ambient and fire condition in one
  • Users can choose between default or manual load combinations, plus input design forces
  • Strength verification for axial force, bending moment, and combined effect

GLT Beam Penetration

The GLT Beam Penetration Calculator simplifies the design process for structural beams with penetrations. The features of this calculator are as follows:

  • Design Standards: Adheres to Eurocode (prEN 1995:2023) or AS 1720:2010/NZ WDG Ch12.6.
  • Material Input Options: Choose between manual input or a preferred partner supplier.
  • Penetration Shapes: Covers rectangular and circular-shaped penetrations up to five penetrations.
  • Beam Type: Focuses exclusively on simply supported beams.
  • Load Combinations: Offers input design forces.
  • Strength Verification: Includes built-in checks for geometric limitations, tension capacity, flexural capacity, and shear capacity.
  • Reinforcement Check: Provides screw reinforcement geometry and design checks.

Member Design Calculator

The Member Design Calculator simplifies the design of axially loaded members. This calculator’s features include:

  • Design Standards: Adheres to AS 1720:2010 and EN 1995:2024.
  • Material Input Options: Choose between standard materials or manually input supplier-specific properties.
  • Strength Verification: Includes checks for bending, shear, compression, tension, and stability.
  • Comprehensive Analysis Summary: Generates summaries of material properties, design utilization, and key results.
  • Dynamic Visuals: Provides real-time diagrams of axial force application, section views, and other critical factors.
  • Versatile Applications: Suitable for residential, commercial, and industrial projects

 

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CLT Floor Ambient
CLT Floor Ambient​

The CLT Floor Ambient Calculator enables the fast & efficient design of CLT floors under ambient conditions. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Vibration methods include FP Innovations, Modified Eurocode 5 & Draft Eurocode 5
  • Users can choose between default or manual load combinations, plus input design forces
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for shear force and bending moment
  • Service verification for deflection and vibration

Learn More
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CLT Floor Fire
CLT Floor Fire​

The CLT Floor Ambient Calculator enables the fast & efficient design of CLT floors under ambient conditions. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Vibration methods include FP Innovations, Modified Eurocode 5 & Draft Eurocode 5
  • Users can choose between default or manual load combinations, plus input design forces
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for shear force and bending moment
  • Service verification for deflection and vibration

Learn More
3
CLT Floor Point Load
 CLT Floor Point Load

Designing CLT floors exposed to concentrated loads can be designed quickly and effectively with the help of the CLT Floor Ambient Point Load Calculator. This calculator has the following features:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or preferred partner supplier
  • Dynamic interactive image for a point load application
  • Effective width and load propagation calculation according to pro:Holz
  • Users can choose between default or manual load combinations, plus input design forces
  • Analytical method for panel properties includes, shear analogy, gamma , and extended gamma
  • Strength verification for shear force and bending moment
  • Service verification for deflection

Learn More
4
CLT Wall Ambient
CLT Wall Ambient

The CLT Wall Ambient Calculator enables the fast & efficient design of CLT walls under ambient conditions. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Users can choose between default or manual load combinations, plus input design forces
  • Platform and Balloon type of construction are available
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for axial force, bending moment, and combined effect

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CLT Wall Fire
CLT Wall Fire

The CLT Wall Fire Calculator enables a quick and effective post fire CLT wall design. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • EN 1995-1-2:2020 used for charring calculation
  • Users can choose between default or manual load combinations, plus input design forces
  • Platform and Balloon type of construction are available
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma
  • Strength verification for axial force, bending moment, and combined effect

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CLT Beam
CLT Beam

The CLT Beam calculator can be used for quick and effective design of a beam made of CLT material. Features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • FPinnoviation and pro:Holz manual used for In-plane shear study
  • Only simply supported beams are covered
  • Users can choose between default or manual load combinations, plus input design forces
  • Strength verification for shear force and bending moment
  • Service verification for deflection

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CLT Shear Wall
CLT Shear Wall

CLT Toolbox has introduced a powerful software solution designed specifically for the efficient design of CLT shear walls. Features of this software include:

  • Ability to design CLT shear walls using three different design codes: EN 1995:2004, AS 1720:2010, and NZS AS 1720:2022.
  • Comprehensive strength verifications for both CLT members and connectors.
  • Evaluation of compression, tension, and shear forces at the base of the wall or connection level, informed by cutting-edge research from Casagrande et al. (2016), Wallner-Novak et al. (2013), Tomasi (2014), Pei et al. (2012), and Reynolds et al. (2017).
  • In-plane shear verifications conducted according to the Cross-Laminated Timber Design Manual Volume 1 (ProHolz Austria) and the Canadian CLT Handbook, 2019.
  • Lateral deformations of CLT shear walls computed using methodologies from ProHolz and FP Innovations Canada.
  • Explicit buckling checks exclusive to EN 1995:2004, ensuring the stability and safety of the design.

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GLT Beam
GLT Beam

The GLT Beam Calculator simplifies the design of a structural beam made from GLT material. This calculator’s features include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • Support stiffness check for floor vibration
  • EN 1995-1-2:2004 used for charring calculation
  • Design for ambient and fire condition in one
  • Users can choose between default or manual load combinations, plus input design forces
  • Strength verification for shear force and bending moment
  • Service verification for deflection and vibration

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GLT Column
GLT Column

A GLT column can be designed efficiently with the assist of the GLT Column Calculator. The features of this calculator include:

  • Design according to AS1720:2010 and EN 1995-1-1:2004
  • Choose between manual input or a preferred partner supplier
  • EN 1995-1-2:2004 used for charring calculation
  • Design for ambient and fire condition in one
  • Users can choose between default or manual load combinations, plus input design forces
  • Strength verification for axial force, bending moment, and combined effect

10
GLT Beam Penetration
GLT Beam Penetration

The GLT Beam Penetration Calculator simplifies the design process for structural beams with penetrations. The features of this calculator are as follows:

  • Design Standards: Adheres to Eurocode (prEN 1995:2023) or AS 1720:2010/NZ WDG Ch12.6.
  • Material Input Options: Choose between manual input or a preferred partner supplier.
  • Penetration Shapes: Covers rectangular and circular-shaped penetrations up to five penetrations.
  • Beam Type: Focuses exclusively on simply supported beams.
  • Load Combinations: Offers input design forces.
  • Strength Verification: Includes built-in checks for geometric limitations, tension capacity, flexural capacity, and shear capacity.
  • Reinforcement Check: Provides screw reinforcement geometry and design checks.

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Member Design Calculator
Member Design Calculator

The Member Design Calculator simplifies the design of axially loaded members. This calculator’s features include:

  • Design Standards: Adheres to AS 1720:2010 and EN 1995:2024.
  • Material Input Options: Choose between standard materials or manually input supplier-specific properties.
  • Strength Verification: Includes checks for bending, shear, compression, tension, and stability.
  • Comprehensive Analysis Summary: Generates summaries of material properties, design utilization, and key results.
  • Dynamic Visuals: Provides real-time diagrams of axial force application, section views, and other critical factors.
  • Versatile Applications: Suitable for residential, commercial, and industrial projects

 

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    Dowels - Steel-Wood-Steel
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    Dowels - Wood - Steel - Wood
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    Dowels: Steel - Wood
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    Dowels: Plywood - Steel
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    Dowels: Wood-Wood
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    Dowels: Wood - Wood - Wood
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    Screws: Laterally Loaded Steel To Timber
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    Screws: Laterally Loaded Timber To Timber
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    Screws: Axially Loaded To Side Grain
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    Screws: Axially Loaded End Grain
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    CLT - CLT: Half Lap Joint
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    CLT - CLT: Spline Joint
  • 13
    CLT - CLT: Butt Joint
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    CLT Compression Perp To Grain
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    GLT Compression Perp To Grain
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    GLT Beam Notch
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    CLT Slab Notch
CLT Slab Notch

The Steel-Wood-Steel Dowel Connection Calculators are designed for scenarios requiring external steel plates with internal timber. They support Steel-Wood-Steel (SWS) member configurations using dowel or bolt connections, combining the strength of steel with the aesthetic and sustainability of timber. The features of these calculators are as follows:

  • Side steel plate can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Supports both tensile and compressive forces
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • 2D and 3D dynamic images with detailed member dimensions, grades, thicknesses, and bolt grades
  • Options for various steel grades and timber materials, including GLT, LVL, and Sawn Timber
  • Supplier data for timber materials
  • Ensures structural integrity by combining the benefits of steel and timber

Learn More
CLT Slab Notch

The wood steel wood calculators are tailored for engineers designing with timber & steel plate connections. The features of these calculators are as follows:

  • Middle steel plate can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Supports both tensile and compressive forces
  • Incorporates various suppliers with manual input for supplier grades and dimensions
  • Double shear case design for WSW connections
  • Options for different steel grades and timber materials, including GLT, LVL, and Sawn Timber
  • User input for the angle between the steel member and steel plate
  • Follows European Yield Model for New Zealand and Eurocode standards
  • Dynamic adjustment of yield failure modes based on bolt thickness and diameter

Learn More
CLT Slab Notch

The Steel-Wood Dowel Connection Calculators are crafted for engineers needing to integrate timber with steel plates. They support Steel-Wood (SW) member configurations using dowel or bolt connections, providing a comprehensive analysis using the European Yield Model. The features of these calculators are as follows:

  • Steel plates can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Accommodates both tensile and compressive forces
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Options for different steel grades and timber materials, including GLT, LVL, and Sawn Timber
  • Supplier grade and dimension inputs
  • User-defined angles between the steel plate and timber member
  • Single shear case design for SW configurations
  • Output summary with all calculations and checks
  • Dimension checks based on standard criteria
  • Strength calculations for design yield moment, rope effect, yield strength, and various brittle failures

Learn More
CLT Slab Notch

The Plywood-Wood Dowel Connection Calculators are designed for engineers needing to integrate plywood with timber. They support Plywood-Wood (PW) member configurations using dowel or bolt connections, providing a detailed analysis using the European Yield Model. The features of these calculators are as follows:

  • Plywood can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Accommodates both tensile and compressive forces
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Options for different suppliers (Timberlink, ASH, CUSP, and Hyne) with manual input for grades and dimensions
  • Single shear case design for PW configurations
  • User-defined angles between the plywood and timber member
  • Dynamic 2D images for visualizing various bolt configurations (uneven, even bolt distribution, and circular bolt distribution)
  • Follows European Yield Model for New Zealand and Eurocode standards

Learn More
CLT Slab Notch

The Wood-Wood Dowel Connection Calculators are designed for scenarios requiring connections between wood members. They support wood-wood configurations using dowel or bolt connections, providing a comprehensive analysis to ensure safety and compliance with engineering standards. The features of these calculators are as follows:

  • Enables selection design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Dynamic images based on user input, detailing timber member dimensions, supplier grades, bolt diameters, and fastener grades
  • Configuration parameters validated against design criteria through dimension checks
  • Output summary includes checks for member configuration dimensions, yield failure verification, and various brittle failure modes such as row shear, block shear, group tear-out, and net tension
  • Strength calculations cover design yield moment, rope effect, various yield failure modes, and brittle failure modes
  • Supports configurations parallel, perpendicular, or at an angle to the grain
  • European yield failure modes dynamically adjust with changes in bolt thickness and diameter

CLT Slab Notch

The Wood-Wood-Wood Dowel Connection Calculators are designed for engineers handling wood-to-wood connections, specifically for Wood-Wood-Wood at Angle (Double Shear Case) and Wood-Wood at Angle (Single Shear Case) configurations. The features of these calculators are as follows:

  • Options for parallel-to-grain embedment for members, positioned as middle or side members with variable angles
  • Configuration parameters validated against design criteria through dimension checks
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Dynamic images based on default or user inputs, detailing timber member dimensions, supplier grades, bolt diameters, and fastener grades
  • Accommodates different suppliers with manual input for supplier grades and dimensions
  • Output summary includes checks for member configuration dimensions, yield failure verification, and analysis of various brittle failure modes
  • Strength calculations cover design yield moment, rope effects, different yielding failure modes, and brittle failure modes
  • European yield failure modes dynamically adjust with changes in bolt thickness and diameter

CLT Slab Notch

This calculator ensures precise evaluations and optimal designs, adhering to the relevant standards and guidelines for such connections. The features of this calculators are as follows:

  • Tailored to analyze screw connections subjected to lateral loads, taking into account the interaction between steel and timber materials for a comprehensive evaluation.
  • The connecting member could be parallel, perpendicular, or inclined.
  • Supports a wide range of input parameters, including various screw dimensions, material properties, load conditions, and connection configurations, to facilitate detailed, scenario-specific analysis and design.
  • Provides dynamic and interactive diagrams that adjust in real time to the provided inputs, effectively visualizing load paths and screw performance to enhance understanding.
  • Designs are conducted in accordance with AS 1720:2010 and EN 1995:2004 standards, incorporating European Technical Assessments (ETAs) from reputable suppliers like Rothoblass, Eurotec, Sihga, and Spax, supported by an extensive screw database.
  • Generates comprehensive summaries that include geometry checks and shear capacity utilization, enabling informed and accurate design decisions.

CLT Slab Notch

The calculator ensures accurate evaluations and optimal designs, fully compliant with relevant standards and guidelines. Key features of this calculator include:

  • Tailored to analyze screw connections subjected to lateral loads, with a focus on the interactions between timber members for an accurate evaluation.
  • The connecting member could be parallel, perpendicular, or inclined.
  • Supports a wide range of input parameters, including screw dimensions, material properties, load conditions, and connection configurations, to facilitate a detailed and scenario-specific analysis.
  • Provides dynamic and interactive diagrams that adapt to the inputs, effectively visualizing load paths and the performance of screws, enhancing comprehension and analysis.
  • Designs are performed in accordance with the AS 1720:2010 and EN 1995:2004 standards, incorporating European Technical Assessments (ETAs) from notable suppliers such as Rothoblass, Eurotec, Sihga, and Spax, supported by a comprehensive screw database.
  • Generates detailed summaries that include geometry checks and shear capacity utilization, aiding in making well-informed and accurate design decisions.

CLT Slab Notch

The Axially Loaded Screws Side Grain Module is a crucial tool for engineers working on connections involving screws subjected to axial loads, as well as inclined screws under axial or lateral loads.

Features of this calculator include:

  • Design axially loaded screws using EN 1995:2004, AS 1720:2010, and prEN 1995:2023.
  • Input screws from leading suppliers such as Rothoblass, Eurotec, Sihga, Spax, and Simpson Strong-Tie.
  • Manual input for screw parameters, including dimensions and material properties.
  • Perform calculations based on the selected supplier’s ETA document or chosen design code.
  • Suitable for both inclined screws and screws fixed perpendicular to the grain direction.
  • Generate dynamic diagrams that update according to input data, visualizing load paths and screw performance.
  • Provide comprehensive summaries, including geometry checks and axial capacity utilization, for informed and reliable design decisions.
  • Perform calculations for timber connections with screws fixed in the side grain direction

CLT Slab Notch

The Axially Loaded Screws End Grain Module is a crucial tool for engineers designing connections involving screws subjected to axial loads, as well as inclined screws under axial or lateral forces.

Features of this calculator include:

  • Ability to design axially loaded screws using three different design codes: EN 1995:2004, AS 1720:2010, prEN 1995:2023.
  • Ability to input screws from leading suppliers such as Rothoblass, Eurotec, Sihga, Spax, and Simpson Strong-Tie.
  • Manual input of screw parameters, including screw dimensions and material properties, is also possible.
  • Calculations can be performed according to the selected supplier’s ETA document or the chosen design code.
  • Can be used to design both inclined screws and screws fixed perpendicular to the grain direction.
  • Provides dynamic diagrams that update according to input data, offering clear visualization of load paths and the axial performance of screws.
  • Generates comprehensive summaries, including geometry checks and axial capacity utilization, providing the data necessary for informed and reliable design decisions.
  • Capable of performing calculations for timber connections with screws fixed in the end grain direction.

CLT Slab Notch

This Half Lap Joint Floor Connection Calculator is designed to provide precise and reliable analysis for timber floor connections, specifically focusing on the half-lap joint configuration, which is widely used in timber construction. The features of this calculator are as follows:

  • The calculator assesses the performance of half-lap joints under various loads including Shear , shear-tension, and combined effect, considering timber member and fastener interactions for accurate joint capacity evaluation.
  • Users can input timber dimensions, material properties, joint configurations, and loads for a detailed analysis reflecting real-world scenarios.
  • The tool provides dynamic, interactive diagrams that update with user inputs, visualizing load distribution in the half-lap joint for better understanding.
  • Supports both standard and custom material grades, accommodating different design needs and ensuring compatibility with various timber species and fasteners.
  • Designs follow major standards such as AS 1720:2010 and EN 1995:2004, and include ETAs from suppliers like Rothoblass, Eurotec, Sihga, and Spax to meet high-quality benchmarks.
  • Provides extensive screw database
  • Outputs comprehensive summaries covering geometry checks and shear capacity utilization, aiding in accurate and informed design decisions

CLT Slab Notch

This Floor Spline Joint Calculator is precisely crafted to provide accurate and reliable analysis for timber floor connections, with a special focus on the spline joint configuration, commonly utilized in modern timber construction. The features of this calculator include.

  • The calculator assesses spline joint performance under various loads, including shear and shear-tension, and evaluates timber and fastener interactions for precise joint capacity assessments.
  • Users can input timber dimensions, material properties, joint configurations, and loads for thorough analyses that reflect real-world applications.
  • Provides dynamic, interactive diagrams that update with user inputs, visualizing load distribution in the spline joint for better design optimization.
  • Supports both standard and custom material grades, offering flexibility and ensuring compatibility with various timber species and fasteners.
  • Adheres to industry standards such as AS 1720:2010 and EN 1995:2004, and includes ETAs from suppliers like Rothoblass, Eurotec, Sihga, and Spax to ensure high-quality designs.
  • Features a comprehensive database of screws and fasteners, allowing users to select the best options for their design needs.
  • Delivers detailed summaries with geometry checks and shear capacity utilization, aiding in accurate and informed design decisions.

CLT Slab Notch

This Butt Joint Calculator is designed to provide precise and reliable analysis for timber connections, specifically focusing on butt joint configurations, which are commonly used in various forms of timber construction. The key features of this calculator include:

  • Evaluates butt joint performance under axial and shear forces in both orthogonal directions, ensuring accurate joint capacity and structural behavior analysis.
  • Allows users to input timber dimensions, material properties, joint configurations, and loads for a comprehensive, real-world analysis.
  • Features interactive diagrams that update with input changes, visually representing load paths for better design decisions.
  • Supports both standard and custom material grades, accommodating various timber species and fastener types for flexible construction needs.
  • Adheres to AS 1720:2010 and EN 1995:2004 standards, incorporating ETAs from suppliers like Rothoblass, Eurotec, Sihga, and Spax for code-compliant designs.
  • Offers a wide database of screws, nails, and fasteners to help users choose the right fastening solutions for their designs.
  • Provides detailed reports with geometry checks and load capacity calculations to guide safe, efficient timber structure designs.

CLT Slab Notch

The CLT Compression Perpendicular to Grain Calculator is designed for engineers working on the analysis and design of CLT (Cross-Laminated Timber) members under compression loads perpendicular to the grain. This tool ensures accurate assessments and optimized designs in compliance with relevant standards and guidelines. The features of these calculators are as follows:

  • Analyzes CLT members under compression loads perpendicular to the grain.
  • Accommodates various input parameters like member dimensions, load characteristics, and material properties.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides dynamic images and diagrams based on user inputs.
  • Generates a detailed output summary, including stress checks and capacity calculations.
  • Offers flexibility in choosing material suppliers and allows manual input of supplier-specific grades and dimensions.

CLT Slab Notch

The GLT Compression Perpendicular to Grain Calculator is intended for engineers analyzing and designing GLT (Glue-Laminated Timber) members subjected to compression loads perpendicular to the grain. This tool provides precise evaluations and optimized designs, adhering to relevant standards and guidelines. Its features are as follows:

  • Analyzes GLT members under compression loads perpendicular to the grain.
  • Accommodates various input parameters like member dimensions, load characteristics, and material properties.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides dynamic images and diagrams based on user inputs.
  • Generates a detailed output summary, including stress checks and capacity calculations.
  • Offers flexibility in choosing material suppliers and allows manual input of supplier-specific grades and dimensions.

CLT Slab Notch

The Beam Notch Calculator is a specialized tool designed for engineers working on the structural analysis and design of timber beams with notches. The features of this calculator are as follows:

  • Focuses specifically on the structural impact of notches in beams, taking into account the reduced cross-sectional area and stress concentrations that may arise.
  • Accommodates a variety of input parameters, including beam dimensions, notch dimensions, material properties, and applied loads, allowing for comprehensive analysis tailored to specific design scenarios.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides diagrams and visual representations that adjust based on user inputs, helping engineers visualize the effects of notching on the beam’s performance.
  • Generates a thorough summary of the analysis, including stress distribution, capacity checks, and utilization, enabling engineers to make informed design decisions.
  • Offers the option to select from standard material grades or manually input supplier-specific material properties, enhancing the tool’s applicability to various projects and materials.

CLT Slab Notch

The Slab Notch Calculator is a specialized tool for engineers designing and analyzing timber slabs under different loading conditions. It focuses on the structural impact of notches, ensuring that designs meet safety and performance standards. Key features of this calculator include:

  • Assesses the structural implications of notches in CLT slabs, considering reduced cross-sectional area and potential stress concentrations.
  • Allows engineers to input slab dimensions, notch dimensions, material properties, and applied loads for tailored analysis.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides dynamic diagrams and visual outputs based on user inputs to illustrate notching effects.
  • Generates a comprehensive summary, including stress distribution, capacity checks, and safety factors.
  • Offers options to choose from standard material grades or input specific material properties for wide applicability.

Dowels - Steel-Wood-Steel

The Steel-Wood-Steel Dowel Connection Calculators are designed for scenarios requiring external steel plates with internal timber. They support Steel-Wood-Steel (SWS) member configurations using dowel or bolt connections, combining the strength of steel with the aesthetic and sustainability of timber. The features of these calculators are as follows:

  • Side steel plate can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Supports both tensile and compressive forces
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • 2D and 3D dynamic images with detailed member dimensions, grades, thicknesses, and bolt grades
  • Options for various steel grades and timber materials, including GLT, LVL, and Sawn Timber
  • Supplier data for timber materials
  • Ensures structural integrity by combining the benefits of steel and timber

Dowels - Wood - Steel - Wood

The wood steel wood calculators are tailored for engineers designing with timber & steel plate connections. The features of these calculators are as follows:

  • Middle steel plate can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Supports both tensile and compressive forces
  • Incorporates various suppliers with manual input for supplier grades and dimensions
  • Double shear case design for WSW connections
  • Options for different steel grades and timber materials, including GLT, LVL, and Sawn Timber
  • User input for the angle between the steel member and steel plate
  • Follows European Yield Model for New Zealand and Eurocode standards
  • Dynamic adjustment of yield failure modes based on bolt thickness and diameter

Dowels: Steel - Wood

The Steel-Wood Dowel Connection Calculators are crafted for engineers needing to integrate timber with steel plates. They support Steel-Wood (SW) member configurations using dowel or bolt connections, providing a comprehensive analysis using the European Yield Model. The features of these calculators are as follows:

  • Steel plates can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Accommodates both tensile and compressive forces
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Options for different steel grades and timber materials, including GLT, LVL, and Sawn Timber
  • Supplier grade and dimension inputs
  • User-defined angles between the steel plate and timber member
  • Single shear case design for SW configurations
  • Output summary with all calculations and checks
  • Dimension checks based on standard criteria
  • Strength calculations for design yield moment, rope effect, yield strength, and various brittle failures

Dowels: Plywood - Steel

The Plywood-Wood Dowel Connection Calculators are designed for engineers needing to integrate plywood with timber. They support Plywood-Wood (PW) member configurations using dowel or bolt connections, providing a detailed analysis using the European Yield Model. The features of these calculators are as follows:

  • Plywood can be positioned parallel, perpendicular, or at an angle to the timber grain
  • Accommodates both tensile and compressive forces
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Options for different suppliers (Timberlink, ASH, CUSP, and Hyne) with manual input for grades and dimensions
  • Single shear case design for PW configurations
  • User-defined angles between the plywood and timber member
  • Dynamic 2D images for visualizing various bolt configurations (uneven, even bolt distribution, and circular bolt distribution)
  • Follows European Yield Model for New Zealand and Eurocode standards

Dowels: Wood-Wood

The Wood-Wood Dowel Connection Calculators are designed for scenarios requiring connections between wood members. They support wood-wood configurations using dowel or bolt connections, providing a comprehensive analysis to ensure safety and compliance with engineering standards. The features of these calculators are as follows:

  • Enables selection design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Dynamic images based on user input, detailing timber member dimensions, supplier grades, bolt diameters, and fastener grades
  • Configuration parameters validated against design criteria through dimension checks
  • Output summary includes checks for member configuration dimensions, yield failure verification, and various brittle failure modes such as row shear, block shear, group tear-out, and net tension
  • Strength calculations cover design yield moment, rope effect, various yield failure modes, and brittle failure modes
  • Supports configurations parallel, perpendicular, or at an angle to the grain
  • European yield failure modes dynamically adjust with changes in bolt thickness and diameter

Dowels: Wood - Wood - Wood

The Wood-Wood-Wood Dowel Connection Calculators are designed for engineers handling wood-to-wood connections, specifically for Wood-Wood-Wood at Angle (Double Shear Case) and Wood-Wood at Angle (Single Shear Case) configurations. The features of these calculators are as follows:

  • Options for parallel-to-grain embedment for members, positioned as middle or side members with variable angles
  • Configuration parameters validated against design criteria through dimension checks
  • Design according to AS 1720:2010 , NZS AS 1720:2023 , and EN 1995:2004
  • Dynamic images based on default or user inputs, detailing timber member dimensions, supplier grades, bolt diameters, and fastener grades
  • Accommodates different suppliers with manual input for supplier grades and dimensions
  • Output summary includes checks for member configuration dimensions, yield failure verification, and analysis of various brittle failure modes
  • Strength calculations cover design yield moment, rope effects, different yielding failure modes, and brittle failure modes
  • European yield failure modes dynamically adjust with changes in bolt thickness and diameter

Screws: Laterally Loaded Steel To Timber

This calculator ensures precise evaluations and optimal designs, adhering to the relevant standards and guidelines for such connections. The features of this calculators are as follows:

  • Tailored to analyze screw connections subjected to lateral loads, taking into account the interaction between steel and timber materials for a comprehensive evaluation.
  • The connecting member could be parallel, perpendicular, or inclined.
  • Supports a wide range of input parameters, including various screw dimensions, material properties, load conditions, and connection configurations, to facilitate detailed, scenario-specific analysis and design.
  • Provides dynamic and interactive diagrams that adjust in real time to the provided inputs, effectively visualizing load paths and screw performance to enhance understanding.
  • Designs are conducted in accordance with AS 1720:2010 and EN 1995:2004 standards, incorporating European Technical Assessments (ETAs) from reputable suppliers like Rothoblass, Eurotec, Sihga, and Spax, supported by an extensive screw database.
  • Generates comprehensive summaries that include geometry checks and shear capacity utilization, enabling informed and accurate design decisions.

Screws: Laterally Loaded Timber To Timber

The calculator ensures accurate evaluations and optimal designs, fully compliant with relevant standards and guidelines. Key features of this calculator include:

  • Tailored to analyze screw connections subjected to lateral loads, with a focus on the interactions between timber members for an accurate evaluation.
  • The connecting member could be parallel, perpendicular, or inclined.
  • Supports a wide range of input parameters, including screw dimensions, material properties, load conditions, and connection configurations, to facilitate a detailed and scenario-specific analysis.
  • Provides dynamic and interactive diagrams that adapt to the inputs, effectively visualizing load paths and the performance of screws, enhancing comprehension and analysis.
  • Designs are performed in accordance with the AS 1720:2010 and EN 1995:2004 standards, incorporating European Technical Assessments (ETAs) from notable suppliers such as Rothoblass, Eurotec, Sihga, and Spax, supported by a comprehensive screw database.
  • Generates detailed summaries that include geometry checks and shear capacity utilization, aiding in making well-informed and accurate design decisions.

Screws: Axially Loaded To Side Grain

The Axially Loaded Screws Side Grain Module is a crucial tool for engineers working on connections involving screws subjected to axial loads, as well as inclined screws under axial or lateral loads.

Features of this calculator include:

  • Design axially loaded screws using EN 1995:2004, AS 1720:2010, and prEN 1995:2023.
  • Input screws from leading suppliers such as Rothoblass, Eurotec, Sihga, Spax, and Simpson Strong-Tie.
  • Manual input for screw parameters, including dimensions and material properties.
  • Perform calculations based on the selected supplier’s ETA document or chosen design code.
  • Suitable for both inclined screws and screws fixed perpendicular to the grain direction.
  • Generate dynamic diagrams that update according to input data, visualizing load paths and screw performance.
  • Provide comprehensive summaries, including geometry checks and axial capacity utilization, for informed and reliable design decisions.
  • Perform calculations for timber connections with screws fixed in the side grain direction

Screws: Axially Loaded End Grain

The Axially Loaded Screws End Grain Module is a crucial tool for engineers designing connections involving screws subjected to axial loads, as well as inclined screws under axial or lateral forces.

Features of this calculator include:

  • Ability to design axially loaded screws using three different design codes: EN 1995:2004, AS 1720:2010, prEN 1995:2023.
  • Ability to input screws from leading suppliers such as Rothoblass, Eurotec, Sihga, Spax, and Simpson Strong-Tie.
  • Manual input of screw parameters, including screw dimensions and material properties, is also possible.
  • Calculations can be performed according to the selected supplier’s ETA document or the chosen design code.
  • Can be used to design both inclined screws and screws fixed perpendicular to the grain direction.
  • Provides dynamic diagrams that update according to input data, offering clear visualization of load paths and the axial performance of screws.
  • Generates comprehensive summaries, including geometry checks and axial capacity utilization, providing the data necessary for informed and reliable design decisions.
  • Capable of performing calculations for timber connections with screws fixed in the end grain direction.

CLT - CLT:  Half Lap Joint

This Half Lap Joint Floor Connection Calculator is designed to provide precise and reliable analysis for timber floor connections, specifically focusing on the half-lap joint configuration, which is widely used in timber construction. The features of this calculator are as follows:

  • The calculator assesses the performance of half-lap joints under various loads including Shear , shear-tension, and combined effect, considering timber member and fastener interactions for accurate joint capacity evaluation.
  • Users can input timber dimensions, material properties, joint configurations, and loads for a detailed analysis reflecting real-world scenarios.
  • The tool provides dynamic, interactive diagrams that update with user inputs, visualizing load distribution in the half-lap joint for better understanding.
  • Supports both standard and custom material grades, accommodating different design needs and ensuring compatibility with various timber species and fasteners.
  • Designs follow major standards such as AS 1720:2010 and EN 1995:2004, and include ETAs from suppliers like Rothoblass, Eurotec, Sihga, and Spax to meet high-quality benchmarks.
  • Provides extensive screw database
  • Outputs comprehensive summaries covering geometry checks and shear capacity utilization, aiding in accurate and informed design decisions

CLT - CLT: Spline Joint

This Floor Spline Joint Calculator is precisely crafted to provide accurate and reliable analysis for timber floor connections, with a special focus on the spline joint configuration, commonly utilized in modern timber construction. The features of this calculator include.

  • The calculator assesses spline joint performance under various loads, including shear and shear-tension, and evaluates timber and fastener interactions for precise joint capacity assessments.
  • Users can input timber dimensions, material properties, joint configurations, and loads for thorough analyses that reflect real-world applications.
  • Provides dynamic, interactive diagrams that update with user inputs, visualizing load distribution in the spline joint for better design optimization.
  • Supports both standard and custom material grades, offering flexibility and ensuring compatibility with various timber species and fasteners.
  • Adheres to industry standards such as AS 1720:2010 and EN 1995:2004, and includes ETAs from suppliers like Rothoblass, Eurotec, Sihga, and Spax to ensure high-quality designs.
  • Features a comprehensive database of screws and fasteners, allowing users to select the best options for their design needs.
  • Delivers detailed summaries with geometry checks and shear capacity utilization, aiding in accurate and informed design decisions.

CLT - CLT: Butt Joint

This Butt Joint Calculator is designed to provide precise and reliable analysis for timber connections, specifically focusing on butt joint configurations, which are commonly used in various forms of timber construction. The key features of this calculator include:

  • Evaluates butt joint performance under axial and shear forces in both orthogonal directions, ensuring accurate joint capacity and structural behavior analysis.
  • Allows users to input timber dimensions, material properties, joint configurations, and loads for a comprehensive, real-world analysis.
  • Features interactive diagrams that update with input changes, visually representing load paths for better design decisions.
  • Supports both standard and custom material grades, accommodating various timber species and fastener types for flexible construction needs.
  • Adheres to AS 1720:2010 and EN 1995:2004 standards, incorporating ETAs from suppliers like Rothoblass, Eurotec, Sihga, and Spax for code-compliant designs.
  • Offers a wide database of screws, nails, and fasteners to help users choose the right fastening solutions for their designs.
  • Provides detailed reports with geometry checks and load capacity calculations to guide safe, efficient timber structure designs.

CLT Compression Perp To Grain

The CLT Compression Perpendicular to Grain Calculator is designed for engineers working on the analysis and design of CLT (Cross-Laminated Timber) members under compression loads perpendicular to the grain. This tool ensures accurate assessments and optimized designs in compliance with relevant standards and guidelines. The features of these calculators are as follows:

  • Analyzes CLT members under compression loads perpendicular to the grain.
  • Accommodates various input parameters like member dimensions, load characteristics, and material properties.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides dynamic images and diagrams based on user inputs.
  • Generates a detailed output summary, including stress checks and capacity calculations.
  • Offers flexibility in choosing material suppliers and allows manual input of supplier-specific grades and dimensions.

GLT Compression Perp To Grain

The GLT Compression Perpendicular to Grain Calculator is intended for engineers analyzing and designing GLT (Glue-Laminated Timber) members subjected to compression loads perpendicular to the grain. This tool provides precise evaluations and optimized designs, adhering to relevant standards and guidelines. Its features are as follows:

  • Analyzes GLT members under compression loads perpendicular to the grain.
  • Accommodates various input parameters like member dimensions, load characteristics, and material properties.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides dynamic images and diagrams based on user inputs.
  • Generates a detailed output summary, including stress checks and capacity calculations.
  • Offers flexibility in choosing material suppliers and allows manual input of supplier-specific grades and dimensions.

GLT Beam Notch

The Beam Notch Calculator is a specialized tool designed for engineers working on the structural analysis and design of timber beams with notches. The features of this calculator are as follows:

  • Focuses specifically on the structural impact of notches in beams, taking into account the reduced cross-sectional area and stress concentrations that may arise.
  • Accommodates a variety of input parameters, including beam dimensions, notch dimensions, material properties, and applied loads, allowing for comprehensive analysis tailored to specific design scenarios.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides diagrams and visual representations that adjust based on user inputs, helping engineers visualize the effects of notching on the beam’s performance.
  • Generates a thorough summary of the analysis, including stress distribution, capacity checks, and utilization, enabling engineers to make informed design decisions.
  • Offers the option to select from standard material grades or manually input supplier-specific material properties, enhancing the tool’s applicability to various projects and materials.

CLT Slab Notch

The Slab Notch Calculator is a specialized tool for engineers designing and analyzing timber slabs under different loading conditions. It focuses on the structural impact of notches, ensuring that designs meet safety and performance standards. Key features of this calculator include:

  • Assesses the structural implications of notches in CLT slabs, considering reduced cross-sectional area and potential stress concentrations.
  • Allows engineers to input slab dimensions, notch dimensions, material properties, and applied loads for tailored analysis.
  • Adheres to the design according to AS 1720:2010 and EN 1995:2023
  • Provides dynamic diagrams and visual outputs based on user inputs to illustrate notching effects.
  • Generates a comprehensive summary, including stress distribution, capacity checks, and safety factors.
  • Offers options to choose from standard material grades or input specific material properties for wide applicability.

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Design Infrastructure For Mass Timber

Make mass timber an accessible tool. 

Software saves time for engineers making mass timber a true option for all projects. 

Leverage the best design computations. 

Take advantage of the world’s best design methods and third party review process. 

Optimise for the most cost effective solution.

Calculation confidence improves efficiency on design, improving cost effectiveness for your clients.

Don’t worry about calculation maintenance. 

Suppliers can change their design data and design methods update. This results in maintenance costs that are not necessary for engineers to burden. 

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We provide the education that was missing at university.

At CLT Toolbox, we simplify mass timber design by providing the missing education and resources that engineers need to confidently navigate the design process.

Our app includes lectures for each calculator, summarised resources for context on each input, and transparency, so you know what the mass timber software is doing. With our app, engineers can quickly and accurately design mass timber structures with confidence.

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CLT Toolbox simplifies mass timber design software, making it accessible to any structural engineer. Our transparent calculation routines are not a black box, allowing you to follow the design methods.

We also provide up-to-date supply chain availability and supplier contacts, enabling streamlined supply procurement.

CLT Toolbox provides the necessary CLT design constraints with transparent design methods to automate mass timber design.

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CLT Toolbox is your one-stop-shop for staying up-to-date with the evolving field of mass timber design with CLT design software. We bring together the best practice resources from around the world, and our calculations are third-party reviewed by world-class timber specialists to ensure their accuracy.

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Your team & engineers behind the CLT Toolbox paywall can leverage the calculators to design in your products.

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For structural engineers looking to design with mass timber. The free version gives access to:

Features:

  • Access to 4 Member Design calculators including CLT Floor Design, CLT Wall Design, CLT Floor Fire Design, & GLT Beam Design
  • Access to Connection Design calculators including 1 dowels & 1 screws calculator.
  • Access to Premium Supplier Partner’s product data in calculations.
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For structural engineers looking to design with mass timber. The pro version gives access to:

Everything in the free version plus:

  • Access to “manual input” for flexibility for design with fully supply chain.
  • Access to Basic Member Partner’s data on the CLT Toolbox platform.
  • Unlimited access to all analytical methods of the CLT Toolbox platform.
  • Unlimited access across geographies. 
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For companies looking for multiple license deals across their company.

Everything in the free version plus:

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  • Ability to input company logo on all project reporting. 
  • Significant bulk discount on multiple licenses for your company. 
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For structural engineers looking to design with mass timber. The extended free version made available by:

Features:

  • Access to 4 Member Design calculators including CLT Floor Design, CLT Wall Design, CLT Floor Fire Design, & GLT Beam Design
  • Access to 17 dowel design calculators.
  • Access to 1 screw calculator.
  • Access to Premium Supplier Partner’s product data in calculations.
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For structural engineers looking to design with mass timber. The pro version gives access to:

Everything in the free version plus:

  • Access to “manual input” for flexibility for design with fully supply chain.
  • Access to Basic Member Partner’s data on the CLT Toolbox platform.
  • Unlimited access to all analytical methods of the CLT Toolbox platform.
  • Unlimited access across geographies. 
  • Inclusion of advanced analysis features. 

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Just email us your TDS (ENZ)  membership number and we’ll give you the discount.

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For companies looking for multiple license deals across their company.

Everything in the free version plus:

  • Additional Enterprise portal to view & access all projects and calculations saved by a company. 
  • Ability to input company logo on all project reporting. 
  • Significant bulk discount on multiple licenses for your company. 
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Features:

  • Access to all Member Design calculators including floor design, wall design, fire design, beam design & column design & more.
  • Access to all Connection Design calculators including dowels, screws, slab notch, floor-floor connections & more.
  • Access to Premium Supplier Partner’s product data in calculations.
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We’re busy building the features that engineers have been requested on the beta program so far. These include National Annexes, improved loading code modules and connection design.

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We are excited to begin our USA & Canadian beta program in approximately September-October this year.

We’re currently deep into building the software to the ICC international Building Code (ICC).

We’re busy incorporating to specifications as outlined in the PRG 320.
We’re looking to partner with engineers & suppliers who are excited by collaborating in building the infrastructure for USA & Canada that can help make mass timber a mainstream material. Contact us if you would like to participate. 

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We are excited to begin our USA & Canadian beta program in approximately September-October this year.

We’re currently deep into building the software to the ICC international Building Code (ICC).

We’re busy incorporating to specifications as outlined in the PRG 320.

We’re looking to partner with engineers & suppliers who are excited by collaborating in building the infrastructure for USA & Canada that can help make mass timber a mainstream material. Contact us if you would like to participate. 

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