Generated by All in One SEO Pro v5.0.0.1, this is an llms.txt file, used by LLMs to index the site. # SPEC Toolbox ## Sitemaps - [XML Sitemap](https://spectoolbox.com/sitemap.xml): Contains all public & indexable URLs for this website. ## Posts - [WoodWorks and SPEC Toolbox Partner to Make Mass Timber Design Easier for Structural Engineers](https://spectoolbox.com/woodworks-and-spec-toolbox-partner-to-make-mass-timber-design-easier-for-structural-engineers/) - CLT shear walls are widely used as the primary lateral force-resisting system in European mass timber buildings. Their design is governed primarily by Eurocode 5, with seismic requirements addressed through Eurocode 8. - [Additions to SPEC Toolbox’s CLT Shear Wall Design in Europe](https://spectoolbox.com/additions-to-spec-toolboxs-clt-shear-wall-design-in-europe/) - CLT shear walls are widely used as the primary lateral force-resisting system in European mass timber buildings. Their design is governed primarily by Eurocode 5, with seismic requirements addressed through Eurocode 8. - [CLT Analytical Design Methods](https://spectoolbox.com/understanding-analytical-methods-of-clt-shear-analogy-gamma-extended-gamma-and-timoshenko-beam-theory-methods/) - Master analytical methods for CLT design, including Shear Analogy, Gamma, Extended Gamma, and Timoshenko beam theory. Explore our expert technical guide. - [Timber Unlimited NZ Partnership](https://spectoolbox.com/timber-unlimited-and-clt-toolbox-partner-to-launch-free-advanced-timber-design-software-for-engineers-in-new-zealand/) - Timber Unlimited and CLT Toolbox partner to launch free advanced timber design software for engineers in New Zealand. Improve your structural design today. - [CLT Compression Calculator Design Guide](https://spectoolbox.com/clt-compression-perpendicular-to-grain-calculator-design-considerations-and-load-support-location-effects/) - Master CLT compression perpendicular to grain design. Our expert technical guide covers critical load support location effects and structural calculations. - [CLT Toolbox Updates: Functional Changes to Design Features ](https://spectoolbox.com/clt-toolbox-updates-functional-changes-to-design-features/) - Explore CLT Toolbox functional changes in the 0.0.6 update: enhanced maintenance, educational content, and autosave for an improved design experience. - [Laterally Loaded Screw connections](https://spectoolbox.com/laterally-loaded-screw-connections/) - Understand laterally loaded screw connections for mass timber builds. This engineering guide details load capacity, shear forces, and safety standards. - [Timber-Concrete Composite (TCC) Floors: Design Overview and Key Considerations](https://spectoolbox.com/timber-concrete-composite-tcc-floors-design-overview-and-key-considerations/) - Master TCC floor design with our expert technical guide. Explore key engineering considerations for creating high-performance, sustainable timber structures. - [Ribbed Deck Complete Design Guide for Engineers](https://spectoolbox.com/ribbed-deck-complete-design-guide-for-engineers/) - Master ribbed deck design with our expert technical guide. Explore essential load-bearing calculations, structural standards, and engineering best practices. - [Indonesia Office Base Camp Officially Open](https://spectoolbox.com/indonesia-office-base-camp-officially-open/) - Explore the officially opened SPEC Toolbox Indonesia office base camp. Discover how our dedicated team is supporting global mass timber structural engineering. - [White Paper](https://spectoolbox.com/white-paper/) - There are positive trends emerging that will encourage the increased use of mid-rise timber buildings. As interest grows, new bottlenecks - [Beta Program Explained](https://spectoolbox.com/beta-program-explained/) - Discover how the SPEC Toolbox beta program works. Gain early access to advanced structural design tools for mass timber engineering projects right now. - [National Annexes to EN Eurocodes](https://spectoolbox.com/national-annexes-to-en-eurocodes/) - Read the SPEC Toolbox engineering guide on National Annexes to EN Eurocodes. Discover mass timber structural design tips and calculation strategies today. - [Ethiopian Team Hosts Melbourne In Addis Ababa](https://spectoolbox.com/ethiopian-team-hosts-melbourne-in-addis-ababa/) - Discover details on the Ethiopian team hosting a Melbourne delegation in Addis Ababa. Explore how this visit fosters international collaboration and growth. - [Screws in Mass Timber Connections](https://spectoolbox.com/screws-in-mass-timber-connections/) - Read the new SPEC Toolbox engineering blog on screws in mass timber connections. Discover expert structural design tips and calculation strategies today. - [Understanding Analytical Methods of CLT: Shear Analogy, Gamma, and Extended Gamma Methods](https://spectoolbox.com/understanding-analytical-methods-of-clt-shear-analogy-gamma-and-extended-gamma-methods/) - Explore key CLT design methods: Shear Analogy, Gamma, and Extended Gamma, in our blog. Essential for architects and engineers in construction. - [Understanding the Stability Factor (k12) for Slenderness in Mass Timber Design](https://spectoolbox.com/understanding-the-stability-factor-k12-in-mass-timber-design/) - Explore the stability factor K12 in mass timber design. Master structural calculation standards and ensure high-performance outcomes in your projects. - [Understanding Large Dowel-Bolt Design with CLT Toolbox](https://spectoolbox.com/understanding-large-dowel-bolt-design-with-clt-toolbox/) - Master the design of large dowel and bolt connections for CLT projects. Explore our expert guide on structural requirements and efficient design workflows. - [Wrapping up 2024](https://spectoolbox.com/wrapping-up-2024/) - Discover the SPEC Toolbox 2024 year in review. Explore our major software updates, global team expansion, and new mass timber engineering milestones here. - [Designing CLT Shear Wall using CLT Toolbox](https://spectoolbox.com/designing-clt-shear-wall-using-clt-toolbox/) - Learn how to design CLT shear walls using SPEC Toolbox. This expert software guide covers structural principles and mass timber load calculation steps. - [CLT Toolbox Launches 17 Dowel Calculators](https://spectoolbox.com/clt-toolbox-launches-17-dowel-calculators/) - Discover the latest SPEC Toolbox mass timber update. We have officially launched 17 new dowel calculators to streamline your structural connection designs. - [Axially Loaded Screw Connections](https://spectoolbox.com/axially-loaded-screw-connections/) - Master the design of axially loaded screw connections in mass timber. This technical guide covers engineering standards, safety, and load calculations. - [Free Version Launch](https://spectoolbox.com/free-version-launch/) - Access our free version of SPEC Toolbox today. Explore essential structural design tools for mass timber projects and streamline your engineering workflow. - [Reinforced GLT Notch: Enhancing Timber Design for Modern Structures](https://spectoolbox.com/reinforced-glt-notch-enhancing-timber-design-for-modern-structures/) - Understand reinforced GLT notch design for modern timber structures. This engineering guide details load capacity calculations and safety standards for builds. - [Point Load Calculator](https://spectoolbox.com/point-load-calculator/) - Use our point load calculator for mass timber engineering design. This expert tool helps you quickly assess load distribution and structural safety today. - [Comprehensive Guide to The Best Educational Resources on Mass Timber](https://spectoolbox.com/comprehensive-guide-to-the-best-educational-resources-on-mass-timber/) - Explore our comprehensive guide to the best educational resources on mass timber. Master sustainable engineering with curated industry-leading materials. - [What Problems Is CLT Toolbox Looking To Help Solve?](https://spectoolbox.com/what-problems-is-clt-toolbox-looking-to-help-solve/) - Discover the structural engineering problems SPEC Toolbox solves. Learn how our software simplifies mass timber design and boosts your project efficiency. - [Penetrations in GLT Beams](https://spectoolbox.com/beam-penetration-in-mass-timber/) - Understand beam penetration in mass timber. Our expert guide covers structural integrity, fire safety, and design best practices for mass timber builds. - [CLT Wall Eccentricities](https://spectoolbox.com/clt-wall-eccentricities/) - Master the structural design of CLT wall eccentricities. Our expert engineering guide details load distribution and safety for mass timber builds today. - [Compression Perpendicular To Grain](https://spectoolbox.com/compression-perpendicular-to-grain/) - Understand compression perpendicular to grain in timber. Our expert engineering guide covers load capacity and mass timber structural design standards. - [Shear Reinforcement of Timber Beams](https://spectoolbox.com/shear-reinforcement-of-timber-beams/) - Master shear reinforcement for timber beams. Our expert guide details essential design strategies, calculation methods, and structural best practices today. - [SPEC Toolbox Is Now Live In USA & Canada](https://spectoolbox.com/spec-toolbox-is-now-live-in-usa-canada/) - SPEC Toolbox is officially live in the USA and Canada. Experience our advanced mass timber design software tailored for North American structural engineers. - [Screw connection design in the USA](https://spectoolbox.com/screw-connection-design-in-the-usa/) - Master screw connection design for timber in the USA. Explore essential building codes, structural analysis methods, and engineering best practices here. - [CLT Toolbox Grants Free Pro Access to University Students for Sustainable Timber Engineering](https://spectoolbox.com/clt-toolbox-grants-free-pro-access-to-university-students-for-sustainable-timber-engineering/) - We grant free Pro access to university students to support the next generation of sustainable timber engineering. Start your structural design journey today. - [Reaching The Potential Via The Testing of Screws](https://spectoolbox.com/reaching-the-potential-via-the-testing-of-screws/) - Unlock the full potential of timber connections through professional screw testing. Learn essential methods for validating structural performance and safety. - [CLT Toolbox rebrands to SPEC Toolbox](https://spectoolbox.com/clt-toolbox-rebrands-to-spec-toolbox/) - CLT Toolbox is now officially SPEC Toolbox. Explore our new brand identity and commitment to advancing global mass timber design through innovative software. - [Design of CLT Beams](https://spectoolbox.com/design-of-clt-beams/) - Master the design of CLT beams with our expert technical guide. Learn structural analysis, load calculations, and engineering best practices for timber builds. - [Hydrogen embrittlement](https://spectoolbox.com/hydrogen-embrittlement/) - Learn about hydrogen embrittlement in structural steel. Explore causes, mitigation strategies, and design considerations for high-performance projects. - [Brittle Failure of Timber Connections (prEN 1995-1-1:2023)](https://spectoolbox.com/brittle-failure-of-timber-connections-pren-1995-1-12023/) - Understand the brittle failure of timber connections under prEN 1995-1-1:2023. Master structural safety and design standards with our expert technical guide. - [SPEC Toolbox Raises $3M to Automate Specs and Bridge the Supplier-Designer Gap](https://spectoolbox.com/spec-toolbox-raises-3m-to-automate-specs-and-bridge-the-supplier-designer-gap/) - SPEC Toolbox secures $3M in funding to automate engineering specifications and bridge the critical gap between product designers and material suppliers. - [Design of Steel-to-Timber Dowel/Bolt Connections Under Combined Loading to Eurocode 5](https://spectoolbox.com/design-of-steel-to-timber-dowel-bolt-connections-under-combined-loading-to-eurocode-5/) - Manage the complex transition from global actions to local demands in steel-to-timber dowel joints under combined moment, shear, and axial forces. - [Durability of Mass Timber](https://spectoolbox.com/durability-of-mass-timber/) - Mass timber durability comes down to detailing. An engineer’s guide's guide to designing CLT, GLT and LVL for long-term performance. ## Pages - [Home](https://spectoolbox.com/) - Design CLT, glulam and connection details to AS1720, Eurocode 5, NDS and CSA O86 in minutes with free, browser-based calculators. Start designing for free. - [USA](https://spectoolbox.com/us/) - Structural timber design software for US engineers. Design with built-in NDS codes and specify directly from US mass timber manufacturers.Start your free trial. - [Europe](https://spectoolbox.com/eu/) - Welcome to SPEC Toolbox in Europe. Our browser-based platform streamlines your mass timber design and Eurocode 5 structural calculations. No downloads needed. - [Canada](https://spectoolbox.com/ca/) - Welcome to SPEC Toolbox in Canada. Our browser-based platform streamlines your mass timber design and CSA O86 structural calculations. No downloads needed. - [Australia](https://spectoolbox.com/au/) - Structural timber design software for Australian engineers. Design CLT, GLT, and connections to AS1720 standards. Start your free trial and automate today. - [About Us](https://spectoolbox.com/about-us/) - SPEC Toolbox is a browser-based structural engineering platform for mass timber design. Built for engineers, trusted by leading manufacturers. - [Pricing](https://spectoolbox.com/pricing/) - Pricing EUAUSNZUSACANADA FreeUnlimited Free€0Access For Free Pro1 Pro License€1,000Choose Plan EnterpriseUnlimited ProCONTACT USContact Us Pricing Quarterly €0 €300 Contact us Yearly €0 €1,000 Contact us Licenses Unlimited Free 1 Unlimited Pro Feature Assign Tasks Access For Free Pro$2500 AUD/LICENSE 20% discount sponsored by:​ Choose Plan EnterpriseUnlimited ProCONTACT USContact Us Pricing Quarterly $0 $750 Contact us - [Calculators](https://spectoolbox.com/calculators/) - PartnersFree CalculatorsEvery calculator runs free in the browser to AS 1720.1, with certified manufacturer data and fully traceable checks. Region: All Regions Australia Canada Category: All (2) CLT (1) Dowel (2) Live Jul 2026 Live in Australia CLT CLT Design Calculator → Live Jun 2026 Live in Canada Dowel Dowel / Bolt Design Calculator → - [Request Pro Trial](https://spectoolbox.com/request-pro-trial/) - Book a personalized demo of SPEC Toolbox. See how our browser-based platform streamlines mass timber design and structural calculations. No downloads needed. - [Partners](https://spectoolbox.com/partners/) - For building product manufacturersGet Your Products Specified Early. Before Your Competitors Do.You've invested millions in manufacturing capacity and product certification. Don't let a busy specifier be the reason it doesn't convert. Schedule Meet 1 — we show you how the platform works and answer your questions (30 minutes) Meet 2 — live demo of Technical, - [Pricing](https://spectoolbox.com/us/pricing/) - See SPEC Toolbox pricing for the USA. Free access to core calculators. Upgrade to Pro for advanced NDS timber design tools. - [Pricing](https://spectoolbox.com/eu/pricing/) - See SPEC Toolbox pricing for Europe. Free access to core calculators. Upgrade to Pro for advanced Eurocode 5 timber design tools. - [Pricing](https://spectoolbox.com/ca/pricing/) - See SPEC Toolbox pricing for Canada. Free access to core calculators. Upgrade to Pro for advanced CSA O86 timber design tools. - [Pricing](https://spectoolbox.com/au/pricing/) - See SPEC Toolbox pricing for Australia. Free access to core calculators. Upgrade to Pro for advanced AS1720.1 timber design tools. - [Blogs](https://spectoolbox.com/au/blogs/) - Timber engineering articles, design guides and product updates from SPEC Toolbox. Written for structural engineers working with mass timber. - [Blogs](https://spectoolbox.com/ca/blogs/) - Read the latest mass timber engineering blogs from SPEC Toolbox in Canada. Discover industry insights, design tips, and structural calculation strategies. - [Blogs](https://spectoolbox.com/eu/blogs/) - Read the latest mass timber engineering blogs from SPEC Toolbox in Europe. Discover industry insights, design tips, and structural calculation strategies. - [Blogs](https://spectoolbox.com/us/blogs/) - Read the latest mass timber engineering blogs from SPEC Toolbox in the US. Discover industry insights, design tips, and structural calculation strategies. - [Blogs](https://spectoolbox.com/blogs/) - blogs about CLT design, CLT design software, and Timber design - [Contact Us](https://spectoolbox.com/contact-us/) - Get in touch with the SPEC Toolbox team. Support for engineers, suppliers and partnership enquiries. - [Integrate Your Products](https://spectoolbox.com/suppliers/) - Join SPEC Toolbox as an official timber partner. List your products and reach 5,000+ structural engineers specifying mass timber across AU, EU, US and CA. - [Press](https://spectoolbox.com/press/) - SPEC Toolbox press releases, media coverage and announcements. Mass timber structural engineering software for engineers and manufacturers. - [Privacy Policy](https://spectoolbox.com/privacy-policy/) - Welcome to CLT Toolbox, a structural design application owned and operated by CLT Concepts Pty Ltd. This privacy policy - [Terms](https://spectoolbox.com/terms-of-service/) - The Terms, together with any User Policies and our Privacy Policy (Terms) govern all use of the Platform, features, content, and materials offered on Platform ## Free Tools - [Hanger Design for NDS](https://spectoolbox.com/us/hanger-usa/) - Timber Hanger Design Software for the NDS Verify concealed and visible timber hangers to the AWC NDS using certified ICC-ES ESR performance data. Access a unified library of Simpson Strong-Tie hanger systems, complete with fastener patterns, allowable-load checks, and ASD adjustment factors. A Unified Library for Proprietary Hanger Connectors In modern North American timber construction, - [Acoustics | Free Professional Tools](https://spectoolbox.com/au/acoustic-australia/) - Acoustic Design Software | Engineering Platform Launch the free Acoustics Calculator below & verify your floor’s airborne and impact performance in seconds! The New Standard for Australian Mass Timber Engineering Acoustics is one of the governing disciplines in mass timber design. A lightweight CLT floor that sails through its structural and fire checks can still - [CLT Design Software USA](https://spectoolbox.com/us/clt-design-usa/) - Free CLT design calculator for NDS (AWC). Verify CLT floor, wall and connection capacity to US timber design standards. No download needed. - [Glulam Design NDS 2018](https://spectoolbox.com/us/glulam-design-nds/) - Free glulam beam and column design calculator for NDS (AWC). Automated LSD checks for bending, shear, deflection and stability. No download. - [Wood Screw Design to NDS](https://spectoolbox.com/us/wood-screw-design-nds/) - Free wood screw design calculator for NDS. Automated withdrawal and lateral load checks for structural screws in mass timber and light-frame. No download. - [Structural Wood Screw Design to Eurocode 5](https://spectoolbox.com/eu/structural-screw-design-eurocode-5/) - Automate your structural screw designs to Eurocode 5 standards today. Use our engineering software for fast, compliant, and accurate calculations across Europe. - [CLT Design Software for Eurocode 5](https://spectoolbox.com/eu/clt-eurocode5/) - Design CLT floors, walls and connections to Draft Eurocode 5 (prEN 1995-1-2:2023). Free browser-based calculator. No login or download needed. - [Wood Screw Design Software for CSAO86:2024](https://spectoolbox.com/ca/wood-screw-design-csao86-2024/) - Free structural screw design calculator for CSA O86:2024. Design withdrawal and shear connections with real supplier data. No login needed. - [Timber Concrete Composite (TCC) Software | Free Professional Tools](https://spectoolbox.com/au/tcc-australia/) - Automate your timber concrete composite (TCC) designs to Australian standards. Our engineering software provides fast structural calculations. Start today. - [Ribbed Deck Design Software | Free Professional Tools](https://spectoolbox.com/au/ribbed-deck-design-australia/) - Free ribbed deck design calculator for Australian timber structures. Verify ribbed deck capacity and deflection to AS1720.1. No download needed. - [Timber Bracket Design for AS1720](https://spectoolbox.com/au/timber-brackets-as1720/) - Design compliant timber brackets to Australian standard AS 1720. Use SPEC Toolbox's software to automate structural calculations. Start designing today. - [Glulam (GLT) Design for AS1720](https://spectoolbox.com/au/glulam-as1720/) - Free glulam beam and column design calculator for AS1720.1. Check bending, shear, deflection and lateral stability in your browser. No download. - [Timber Screw Design for AS1720](https://spectoolbox.com/au/timber-screw-design-as1720/) - Free timber screw design calculator for AS1720.1. Accurately calculate and verify withdrawal and yield capacity for mass timber projects. No download needed. - [CLT Design Software for AS1720.1 | Free Professional Tools](https://spectoolbox.com/au/clt-as1720/) - Free CLT floor, wall & connection design calculator for AS1720.1. Verify strength, vibration & fire in your browser. No download needed. - [Dowel & Bolt Design Software for AS1720.1](https://spectoolbox.com/au/timber-bolts-dowels-as1720/) - Free timber bolt and dowel calculator for AS1720.1. Quickly analyse and verify connection capacities for complex mass timber projects. No download needed. - [Timber Stud Wall Design for AS1720](https://spectoolbox.com/au/timber-stud-design-as1720/) - Automate your timber stud design to Australian AS 1720 standards. Our browser-based software provides fast structural calculations. Start designing today. - [Timber Stud Wall Design & Calculator](https://spectoolbox.com/eu/timber-stud-wall-design-eurocode-5/) - Automate timber stud wall designs to Eurocode 5 standards today. Use our engineering software for fast, compliant, and accurate calculations across Europe. - [Dowel & Bolt Connection Design to NDS 2024](https://spectoolbox.com/us/dowel-bolt-connection-design-nds/) - Free timber dowel and bolt connection calculator for NDS. Automated yield limit equations and group action factors for mass timber. No download. - [Timber Concrete Composite (TCC) Software for Eurocode 5 | Free Professional Tools](https://spectoolbox.com/eu/tcc-europe/) - Automate your timber concrete composite (TCC) designs to Eurocode standards. Our engineering software provides fast, compliant calculations for Europe. - [Ribbed Deck Software for Eurocode 5 | Free Professional Tools](https://spectoolbox.com/eu/ribbed-deck-design-europe/) - Design compliant ribbed decks to Eurocode 5 standards effortlessly. Our engineering software automates complex structural calculations for European projects. - [Timber Bracket Design for Eurocode 5](https://spectoolbox.com/eu/timber-brackets-design-eurocode-5/) - Design compliant timber brackets to Eurocode 5 standards effortlessly. Our engineering software automates complex structural calculations for European projects. - [Glulam Design for Eurocode 5](https://spectoolbox.com/eu/glulam-design-eurocode-5/) - Free glulam beam calculator for Eurocode 5. Design beams, columns and penetrations to EN 1995-1-1. Supports Draft Eurocode 5 (prEN 1995:2023). - [Dowel & Bolt Design Software for Eurocode 5](https://spectoolbox.com/eu/dowel-bolt-connection-design-eurocode-5/) - Free timber dowel and bolt connection calculator for Eurocode 5. Efficiently analyse, design, and verify structural timber joints. No download needed. - [Glulam Design for CSA O86](https://spectoolbox.com/ca/glulam-design-csao86/) - Free glulam beam and column design calculator for CSA O86. Volume effects, stability factors and deflection checks automated. No login needed. - [Dowel & Bolt Design Software for CSA O86:2024](https://spectoolbox.com/ca/timber-dowel-bolts-csao86-2024/) - Automate timber dowel and bolt designs to Canadian CSA O86-24 standards. Use our structural engineering software for fast, compliant calculations today. - [CLT Design Software for CSA O86](https://spectoolbox.com/ca/clt-design-csao86/) - Free CLT design calculator for CSA O86. Design CLT floors, walls and connections to Canadian timber standards. No login or download needed. ## Partners - [Simpson Strong-Tie](https://spectoolbox.com/partner/simpson-strong-tie/) - Design and verify Simpson Strong-Tie structural timber connectors in SPEC Toolbox. Real manufacturer data for AS1720.1 structural calculations. Free to use. - [Batten & Cradle](https://spectoolbox.com/partner/batten-cradle/) - Batten & Cradle Acoustic Product Integrations The Fastest Way To Design with Batten & Cradle Products About Batten & Cradle Batten & Cradle is a New Zealand based manufacturer and supplier of high-performance acoustic flooring systems designed for modern timber, concrete, and CLT construction. Specialising in innovative flooring solutions for residential, commercial, education, and healthcare - [Binderholz](https://spectoolbox.com/partner/binderholz/) - Design with Binderholz CLT and glulam products in SPEC Toolbox. Real manufacturer data for Eurocode 5 structural calculations. - [NeXTimber](https://spectoolbox.com/partner/next-timber/) - Design and verify Next Timber engineered mass timber in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Rocket](https://spectoolbox.com/partner/rocket/) - Design and verify Rocket Vynex mass timber structural screws in SPEC Toolbox. Real manufacturer data for Eurocode 5 structural calculations. Free to use. - [Sterling](https://spectoolbox.com/partner/sterling/) - Design and verify Sterling cross laminated timber (CLT) products in SPEC Toolbox. Real manufacturer data for your NDS structural calculations. Free to use. - [Smartlam](https://spectoolbox.com/partner/smartlam/) - Design and verify SmartLam cross laminated timber (CLT) products in SPEC Toolbox. Real manufacturer data for your NDS structural calculations. Free to use. - [Freres](https://spectoolbox.com/partner/freres/) - Design and verify Freres engineered mass plywood panel products in SPEC Toolbox. Real manufacturer data for your NDS structural calculations. Free to use. - [Sodra](https://spectoolbox.com/partner/sodra/) - Design and verify Södra engineered mass timber products in SPEC Toolbox. Real manufacturer data for your Eurocode 5 structural calculations. Free to use. - [THEURL](https://spectoolbox.com/partner/theurl/) - Design and verify TheURL structural mass timber products in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [MTT](https://spectoolbox.com/partner/mtt/) - Design and verify MTT structural mass timber connectors in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Kalvasta](https://spectoolbox.com/partner/kalvasta/) - Design and verify Kalvasta structural mass timber products in SPEC Toolbox. Real manufacturer data for your Eurocode 5 structural calculations. Free to use. - [ESSVE](https://spectoolbox.com/partner/essev/) - Design and verify Essev structural mass timber connectors in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Bi-Mirth](https://spectoolbox.com/partner/bi-mirth/) - Design and verify BI-Mirth mass timber structural screws in SPEC Toolbox. Real manufacturer data for Eurocode 5 structural design calculations. Free to use. - [Mercer](https://spectoolbox.com/partner/mercer/) - Design and verify Mercer structural mass timber products in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Nordic Strucutres](https://spectoolbox.com/partner/nordic-strucutres/) - Design and verify Nordic Structures engineered mass timber products in SPEC Toolbox. Real manufacturer data for NDS structural calculations. Free to use. - [XLAM Dolomiti](https://spectoolbox.com/partner/xlam-dolomiti/) - Design and verify XLam Dolomiti cross laminated timber panels in SPEC Toolbox. Real manufacturer data for Eurocode 5 structural calculations. Free to use. - [XLAM](https://spectoolbox.com/partner/xlam/) - Design and verify XLam cross laminated timber solutions in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Würth](https://spectoolbox.com/partner/wurth/) - Use Würth structural fastener data in SPEC Toolbox. Design screw and bracket connections with real Würth product specifications. - [SPAX](https://spectoolbox.com/partner/spax/) - Design and verify SPAX structural screw connections in SPEC Toolbox. Real ETA-certified data for Eurocode 5 and AS1720.1. - [SIHGA](https://spectoolbox.com/partner/sihga/) - Use Sihga structural connector data in SPEC Toolbox. Real product specifications for screw and bracket design calculations. - [Schmid Schrauben Hainfeld](https://spectoolbox.com/partner/schmid-schrauben-hainfeld/) - Design and verify Schmid Schrauben Hainfeld timber screws in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Red Stag](https://spectoolbox.com/partner/red-stag/) - Design with Red Stag structural timber in SPEC Toolbox. Real NZ manufacturer data for AS/NZS 1720.1 calculations. - [Rothoblaas](https://spectoolbox.com/partner/rothoblaas/) - Design and verify Rothoblaas mass timber structural connectors in SPEC Toolbox. Real manufacturer data for Eurocode 5 structural calculations. Free to use. - [Prolam](https://spectoolbox.com/partner/prolam/) - Design and verify Prolam structural glulam timber products in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Klimas](https://spectoolbox.com/partner/klimas/) - Design and verify Klimas structural timber screws and fasteners in SPEC Toolbox. Real manufacturer data for AS1720.1 structural calculations. Free to use. - [Pitzl](https://spectoolbox.com/partner/pitzl/) - Design and verify Pitzl mass timber structural connections in SPEC Toolbox. Real manufacturer data for Eurocode 5 structural calculations. Free to use. - [KLH Supplier](https://spectoolbox.com/partner/klh-supplier/) - Use KLH CLT panel data in SPEC Toolbox. Design CLT floors, walls and connections with real KLH manufacturer specifications. - [Eurotec](https://spectoolbox.com/partner/eurotec/) - Design with Eurotec structural connectors in SPEC Toolbox. Real ETA-certified bracket and screw data for structural calculations. - [Hyne](https://spectoolbox.com/partner/hyne/) - Design with Hyne glulam and structural timber in SPEC Toolbox. Real manufacturer data for AS1720.1 calculations. - [ASH](https://spectoolbox.com/partner/ash/) - Design and verify ASH Australian mass timber products in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Anzor](https://spectoolbox.com/partner/anzor/) - Design and verify Anzor stainless steel timber fasteners in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. - [Timber Unlimited](https://spectoolbox.com/partner/timber-unlimited/) - Design and verify Timber Unlimited engineered timber products in SPEC Toolbox. Real manufacturer data for your AS1720.1 structural calculations. Free to use. ## Product Updates - [Release 2.1.7 - Screw Connections](https://spectoolbox.com/product-update/release-2-1-7-screw-connections/) - [SPEC Toolbox Release!](https://spectoolbox.com/product-update/spec-toolbox-release/) - [Release 2.1.8 - Analysis & One Page Summaries!](https://spectoolbox.com/product-update/release-2-1-8-analysis-one-page-summaries/) - [Release 2.1.6 - Major Updates & New National Annexes](https://spectoolbox.com/product-update/release-2-1-6-major-updates-new-national-annexes/) - [Release 2.1.5 - New Bracket Calculator Category](https://spectoolbox.com/product-update/release-2-1-5-new-bracket-calculator-category/) - [Release 2.1.4 - Fire Design!](https://spectoolbox.com/product-update/release-2-1-4-fire-design/) - [Release 2.1.3 - Focus on Perpendicular to Grain Compression](https://spectoolbox.com/product-update/release-2-1-3-focus-on-perpendicular-to-grain-compression/) - [Release 2.1.2- USA and Canada Beta Version](https://spectoolbox.com/product-update/release-2-1-2-usa-and-canada-beta-version/) - [Release 2.1.10 New Composite Systems: Timber-Concrete Composites & Ribbed Deck Calculators.](https://spectoolbox.com/product-update/release-2-1-10-new-composite-systems-timber-concrete-composites-ribbed-deck-calculators/) - [Release 2.1.1 - CLT to Steel Beam Connection Details, Dowel/Bolt Updates, Screw Filtering & More!](https://spectoolbox.com/product-update/release-2-1-1-clt-to-steel-beam-connection-details-dowel-bolt-updates-screw-filtering-more/) ## Tutorials - [Vertical Bracing Member Design](https://spectoolbox.com/tutorial/vertical-bracing-member-design-2/) - Learn how to use the CLT Toolbox Member Calculator to design a vertical bracing diagonal. We'll walk you through importing analysis results from external tools, identifying maximum tension and compression forces, and selecting the right inputs—grades, sections, code specifics, and forces. Plus, we'll break down the results, covering material properties and all key design checks. - [Screws: Laterally loaded timber to timber end grain](https://spectoolbox.com/tutorial/screws-laterally-loaded-timber-to-timber-end-grain/) - We are thrilled to release the Laterally Loaded Timber-to-Timber End Grain Module, a powerful tool for engineers designing connections with screws subjected to lateral loads. This specialized calculator ensures accuracy and flexibility for timber connection designs. Key Features: • Design Codes: Supports three design codes for laterally loaded screws: EN 1995:2004, AS 1720:2010, and prEN - [Half Lap Connection Calculator](https://spectoolbox.com/tutorial/half-lap-connection-calculator-3/) - Learn how to use the CLT Toolbox Half-lap calculator to model a floor-to-floor diaphragm connection. We start with selecting the CLT layup, supplier, and lap width, and then walk through the difference between discrete and continuous calculation modes. Explore screw supplier options, screw families, and ETA-based optimization. - [Half Lap Connection Calculator](https://spectoolbox.com/tutorial/half-lap-connection-calculator/) - Learn how to use the CLT Toolbox Half-lap calculator to model a floor-to-floor diaphragm connection. We start with selecting the CLT layup, supplier, and lap width, and then walk through the difference between discrete and continuous calculation modes. Explore screw supplier options, screw families, and ETA-based optimization. - [Half - Lap Connection Calculator](https://spectoolbox.com/tutorial/half-lap-connection-calculator-2/) - Discover how to use the CLT Toolbox Half-Lap Calculator to design diaphragm floor-to-floor connections. Start by selecting the CLT layup, supplier, and lap width, then explore the differences between discrete and continuous calculation options. Dive into screw selection, including suppliers, types, and families, while understanding the workflow behind each choice. Input the appropriate loads and - [GLT Beam Penetration Design](https://spectoolbox.com/tutorial/glt-beam-penetration-design-2/) - 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 - [Timber Column Calculator](https://spectoolbox.com/tutorial/timber-column-calculator-2/) - In this video, we’ll walk you through designing Timber Column using tributary area loads, following Eurocode 5 and AS1720 standards. We start by selecting the right material that not only meets the structural demands but also fits the design requirements. Then, we detail how to input the loads from the columns above and the supported - [Beam Notch Calculator](https://spectoolbox.com/tutorial/beam-notch-calculator/) - Design & Verification of a GLT Beam Notch According to EC5 with CLT Toolbox The key question: does the reduced cross-section provide enough capacity, or is reinforcement with screws required? Here’s what we covered in this video: - How to check notch capacity using EC5 - When and how to use reinforcement screws based on - [CLT Diaphgram Design Calculator](https://spectoolbox.com/tutorial/clt-diaphgram-design-calculator/) - Get started with a comprehensive approach to diaphragm design by defining forces, material properties, and applying Eurocode 5 parameters. Begin by defining the input forces acting on the diaphragm in the X-direction and selecting screw types for stiffness calculations. Setting the geometry and orientation of the diaphragm in the user inputs, type of panel connections, - [Vertical Bracing Member Design](https://spectoolbox.com/tutorial/vertical-bracing-member-design/) - Learn how to design vertical bracing diagonals using the CLT Toolbox Member calculator. This video walks you through importing force data from external analysis tools, identifying maximum tension and compression forces, and selecting the correct inputs—grades, sections, design codes, and applied loads. Get a clear overview of the results, including material properties and design checks - [Timber Column Calculator](https://spectoolbox.com/tutorial/timber-column-calculator/) - In this video, we walk you through designing Timber Column using tributary area loads, all in line with Eurocode 5 guidelines. We begin by selecting the right material and national annex, ensuring your starting point is solid and up to code. Next, we show you how to input the appropriate loads from the columns above - [Spline Connection Calculator](https://spectoolbox.com/tutorial/spline-connection-calculator/) - Learn how to design a CLT spline panel-to-panel connection using input forces from diaphragm calculations. Selecting the CLT supplier, spline width, density and material, with an explanation of proper screw selection and availability for setting different screw suppliers, their screw families and screw types. For each group, there is educational content helping to select the - [GLT Beam Penetration Design](https://spectoolbox.com/tutorial/glt-beam-penetration-design/) - 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 - [CLT Wall Calculator](https://spectoolbox.com/tutorial/clt-wall-calculator/) - In this video, you’ll learn how to design a typical CLT wall element step by step. We’ll cover selecting a CLT supplier, using the right functionalities, dynamic images, and educational content to determine the optimal panel thickness and design. You’ll also see how to switch between Platform and Balloon framing types, apply different eccentricity methods, - [CLT Shear Wall Design](https://spectoolbox.com/tutorial/clt-shear-wall-design/) - Glad to announce that the Second Version Of Our CLT Shear Wall Calculator is now LIVE! After 12 months of listening to user feedback, we’re excited to release an enhanced and more robust tool for shear wall design.​ CLT Shear Walls have excellent in-plane strength and can serve as a reliable lateral load resisting system.​ - [CLT Floor Fire Design](https://spectoolbox.com/tutorial/clt-floor-fire-design/) - We’re excited to launch the long-awaited Fire Design module for CLT floors, now available alongside the ambient design calculator on CLT Toolbox. This tutorial walks through how the new module works, including which standards are supported and how char depth is calculated layer by layer. Key features include: Support for multiple fire models: – Draft - [CLT Floor Design Calculator](https://spectoolbox.com/tutorial/clt-floor-design-calculator/) - Join us as we explore everything from choosing the ideal CLT panel—whether you’re opting for a supplier’s product or manually entering your own data—to selecting the right National Annex, defining loads, and refining the finer details. This video walks you through each stage, including structural analysis, stiffness calculations, and even the integration of edge-glue lamellas - [CLT Diaphgram Design Calculator](https://spectoolbox.com/tutorial/clt-diaphgram-design-calculator-2/) - A complete guide to setting up and analyzing diaphragm behavior in the X-direction using CLT Toolbox. You’ll define screw types for stiffness calculations, set panel geometry, connection types, and panel widths. We cover how to input ULS and SLS forces, and explain required in-plane shear values and lamination data. The video finishes with a breakdown ## Case Studies - [MEZeroE](https://spectoolbox.com/case-studies/mezeroe-2/) - There are still some things to unpack from that short description of MEZeroE: the “envelope” consists of the parts of a building that keep the weather out and the conditioned (i.e., heated or cooled) environment in. It is made up of three main systems: the roof, the façade (including walls, windows and doors), and the ## Categories - [Dowel](https://spectoolbox.com/ca/dowel/) - [CLT](https://spectoolbox.com/au/clt/) ## Categories Partner - [CLT](https://spectoolbox.com/category-partner/clt/) - [Acoustic](https://spectoolbox.com/category-partner/acoustic/) ## Regions - [Australia](https://spectoolbox.com/region/australia/) - [Canada](https://spectoolbox.com/region/canada/) - [Europe](https://spectoolbox.com/region/europe/) - [USA](https://spectoolbox.com/region/usa/) ## Categories - [CLT](https://spectoolbox.com/cpt-categories/clt/) - [Dowels](https://spectoolbox.com/cpt-categories/dowels/) - [GLT](https://spectoolbox.com/cpt-categories/glt/) - [Brackets](https://spectoolbox.com/cpt-categories/brackets/) - [Screws](https://spectoolbox.com/cpt-categories/screws/) - [Light-frame](https://spectoolbox.com/cpt-categories/light-frame/) - [Composites](https://spectoolbox.com/cpt-categories/composites/) - [Acoustic](https://spectoolbox.com/cpt-categories/acoustic/) ## Partners - [Rothoblaas](https://spectoolbox.com/partner/rothoblaas/)