Terms of Use

1. What M·O provides

McCarthy-O'Sullivan ("M·O", "we") provides browser-based tools for construction professionals. Free tools may be used without charge; paid features, if any, are described at the point of purchase.

2. Not engineering services

M·O tools present typical approaches, standard calculations, and suggestions. They are not engineering services, do not constitute professional advice, and do not replace the review, judgment, seal, or stamp of a licensed engineer or the requirements of the authority having jurisdiction. You are responsible for verifying every output before relying on it.

3. Your account

You must provide accurate information and keep your password confidential. You are responsible for activity under your account. We may suspend accounts that abuse the service or others.

4. Your files stay yours

Tools that process files do so in your browser; your project files, schedules, and drawings are not sent to us — unless you are signed in and press Save on a Members tool, in which case we hold only that input, under your account, until you delete it. We claim no rights in it either way.

5. Availability and changes

Tools are provided "as is" and may change or be withdrawn. We work to keep them available and correct but do not guarantee either.

6. Limitation of liability

To the fullest extent permitted by law, M·O is not liable for indirect, incidental, or consequential damages, or for losses arising from reliance on tool output. Where liability cannot be excluded, it is limited to the amount you paid us in the preceding twelve months.

7. Contact

Questions: the contact address published on mccarthy-osullivan.com.