The short version: our calculators are planning tools, not engineered designs. Do not build from them alone. Any truss you buy from a fabricator comes with a sealed engineered design, that document governs, not this website.
1. Agreement to these terms
These Terms & Conditions govern your access to and use of Roof Truss Calculator (the "Site") at https://rooftrusscalculator.online, including all calculators, articles, data tables and other content. By using the Site you agree to these terms. If you do not agree, please do not use the Site.
2. What the Site provides
The Site provides free, browser-based calculators and educational content relating to roof truss geometry, quantities, loads, weights and costs. All calculations run locally in your browser.
The calculators are estimation and planning tools. They produce approximations based on standard geometry, simplified load models and general industry practice, using the inputs you supply.
3. No engineering services and no professional relationship
Nothing on the Site constitutes structural engineering, architectural, surveying, construction or professional advice. Using the Site does not create a professional or client relationship of any kind between you and Roof Truss Calculator.
Specifically, the calculators do not:
- Size individual truss members from the actual forces they will carry
- Design connector plates, gussets, fasteners or bearing details
- Check the load combinations required by any building code
- Analyse wind uplift, seismic loading, snow drift or unbalanced snow
- Account for local amendments, site conditions or occupancy requirements
- Constitute or replace a sealed, stamped engineered truss design
4. Your responsibilities
By using the Site you accept that you are responsible for:
- Having any structure designed and, where required, sealed by a licensed structural engineer in your jurisdiction
- Obtaining every permit and approval your local authority requires
- Verifying all figures against manufacturer specifications and sealed drawings
- Complying with all applicable building codes, standards and safety regulations
- Confirming the accuracy of every input you enter
5. Accuracy and availability
We make reasonable efforts to keep the Site's calculations, tables and content accurate and current, but we make no warranty that they are complete, accurate, current or fit for any particular purpose. Prices, span limits, load values and code references change over time and vary by region.
We may modify, suspend or discontinue any part of the Site at any time without notice, and we do not warrant uninterrupted or error-free availability.
6. Limitation of liability
To the fullest extent permitted by law, Roof Truss Calculator and its contributors shall not be liable for any direct, indirect, incidental, special, consequential, exemplary or punitive damages arising out of or relating to your use of, or inability to use, the Site, including without limitation structural failure, property damage, personal injury, construction cost overruns, project delays, rejected inspections or loss of profit, whether based in contract, tort, negligence, strict liability or otherwise, and whether or not we were advised of the possibility of such damages.
The Site is provided on an "as is" and "as available" basis without warranties of any kind, express or implied, including implied warranties of merchantability, fitness for a particular purpose and non-infringement.
Some jurisdictions do not allow certain exclusions or limitations, so parts of this section may not apply to you. Nothing in these terms excludes liability that cannot lawfully be excluded.
7. Intellectual property
All content on the Site, text, calculators, diagrams, code, data tables, graphics and branding, is owned by Roof Truss Calculator or its licensors and is protected by copyright and other intellectual property laws.
You may:
- Use the calculators for personal and commercial project planning
- Print or save calculator results for your own records
- Quote short excerpts of our articles with clear attribution and a link
You may not, without our written permission:
- Reproduce or republish substantial portions of the Site
- Scrape, mirror or systematically extract the Site's content or data
- Reverse engineer, copy or redistribute the calculator logic as your own product
- Remove or obscure any attribution or copyright notice
8. Acceptable use
You agree not to:
- Use the Site for any unlawful purpose
- Attempt to gain unauthorised access to the Site or its infrastructure
- Introduce malicious code, or interfere with the Site's operation
- Place automated load on the Site that degrades it for other users
- Misrepresent the Site's output as an engineered or certified design
9. Third-party links and services
The Site links to third-party websites and may use third-party services (for example, form delivery and hosting). We do not control those parties, do not endorse their content, and accept no responsibility for them. Their own terms and privacy policies apply to your use of them.
10. Changes to these terms
We may update these terms at any time. The "last updated" date at the top reflects the most recent revision. Continued use of the Site after changes constitutes acceptance of the revised terms.
11. Severability
If any provision of these terms is found unenforceable, that provision will be limited or removed to the minimum extent necessary, and the remaining provisions will continue in full force.
12. Contact
Questions about these terms can be sent to hello@rooftrusscalculator.online or through our contact page.