Contact Us

We read every message. The fastest way to reach us is email.

What to include

Reporting an error: the page URL, the inputs you used, the result you got and what you expected.
Suggesting a calculator: the project you're working on and the product sizes you're shopping for.
Advertising or partnerships: a short description of your company and proposal.

We can't give project-specific engineering, structural or code-compliance advice. For those questions, contact your local building department or a licensed contractor.