Product-specific terms
Each resource is sold under the licence stated on its product page. The licence summary on that page and the licence sheet inside the file form the complete terms for that resource. If a product page refers to a different licence, that licence takes precedence over this general explanation.
Standard single-user commercial licence
Unless a product page states otherwise, every resource is sold under the standard single-user commercial licence described here.
You may
- Use the resource on your own projects, including paid client work.
- Install and use it on any number of devices that you personally use.
- Use it for teaching, internal training and study.
- Adapt formulas, layout or wording for your own internal templates.
- Keep a personal or company archive copy for business continuity.
You may not
- Resell, sublicense, rent, lend or distribute the resource.
- Publish the file on a website, shared drive, marketplace or file-sharing service.
- Include the file in a paid course, product, template pack or client deliverable.
- Remove the licence, attribution or version notices.
- Claim authorship of the original resource.
Team and company use
The licence covers one named user. If several engineers will use the resource, one licence is required for each named user. A company-wide or team licence is not included unless the product page says so. Contact us before purchase if you need multiple seats.
Client work
You may use the outputs of a workbook or checklist in your own engineering work, including work delivered to a client. You may not provide the editable source file to the client as a standalone deliverable or as part of a template pack.
Third-party material
Resources are prepared from original material and standard engineering relationships. Where a third-party standard, dataset or tool is referenced, its own terms apply and the reference is identified on the product page. No third-party standard is reproduced in full.
No warranty
Resources are provided as engineering aids. They are not a substitute for independent verification, applicable standards or qualified review. To the extent permitted by law, no warranty is given that a resource is fit for a particular project or free from error.
Termination
This licence ends if you breach its terms. On termination you must stop using the resource and delete the copies you hold, except for records that must be kept by law.
Questions
If your intended use is not clearly covered, ask through the contact form before purchasing. Licence questions are answered before any charge is made.
Last updated: 14 November 2026.