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Australian Engineers can now design mass timber buildings for FREE! We’ve made five calculators free that allow you to design various mass timber structures, including apartments, hotels, offices, and more.  

We’re excited to announce the launch of a free version of CLT Toolbox. This means users can now access our mass timber design tools without any upfront cost. These calculators empower you to design everything from office buildings to apartments with ease.  

“There are over 10,000 structural engineers in Australia, yet only a small fraction specialise in timber,” said CLT Toolbox CEO Adam Jones. “Our mission is to close this gap by equipping engineers with the tools and knowledge to confidently design with timber, ensuring they can offer sustainable options to their clients.  

In Australia, the free version offers essential features for member design, calculating loads, and evaluating the structural integrity of timber elements. With this comprehensive suite of tools, engineers can perform preliminary designs for entire mass timber office or apartment buildings. The software’s embedded educational resources and automated design computations are designed to guide even novice engineers to produce expert-level structural designs. 

CLT Toolbox’s commitment to sustainability extends beyond just offering software. “We are committed to growing Australia’s mass timber category by educating concrete and steel specialists on the benefits of timber. By broadening the skill sets of engineers, CLT Toolbox ensures that when a client seeks a sustainable option, engineers are equipped to deliver,” said Jones. 

What’s In The Free Version?

In Australia, the free version offers essential features for member design, calculating loads, and evaluating the structural integrity of timber elements. With this comprehensive suite of tools, engineers can perform preliminary designs for entire mass timber office or apartment buildings. The software’s embedded educational resources and automated design computations are designed to guide even novice engineers to produce expert-level structural designs. The following provides details of the 5 calculators now accessible for free! 

CLT Floor Calculator

 

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

CLT Floor Fire Calculator

 

The CLT Floor Fire calculator is a tool used for a quick and effective post fire CLT floor design. Among this calculator’s features are:   

  • 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  
  • Analytical methods for panel properties include, shear analogy, gamma , and extended gamma 
  • Strength verification for shear force and bending moment 

CLT Wall Calculator

 

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 

GLT Beam Calculator

 

The GLT Beam Calculator simplifies the design of GLT beams . 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  
  • Simply supported, Two span equal and unequal , and Three span equal 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 and vibration 

GLT Column Calculator

 

GLT Columns 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 

What Our Partners Say

“Offering a freemium version of CLT Toolbox gives structural engineers access to design modules, helping them quickly and confidently design projects using engineered timber. This tool reinforces Timberlink’s commitment to making sustainable timber products more accessible in the construction industry,” said GM Technical & Sales of NeXTimber/Timberlink Jeremy Church.
“As a CLT Toolbox partner, we’re pleased with the free software version’s launch. The integration of KLH® – CLT simplifies design with KLH® elements, offering a user-friendly interface for quick calculations, including fire resistance. This partnership enhances our customers’ design experience,” Area Sales Manager for KLH Markus Janko.
“At Australian Sustainable Hardwoods (ASH), we see the free CLT Toolbox software as transformative. It empowers engineers with tools to innovate and optimise their projects, simplifies calculations, and improves design efficiency. By expanding timber use, we contribute to sustainable building practices and broader adoption of eco-friendly solutions,” said Engineering Design Manager for Australian Sustainable Hardwoods Nathan Benbow.