Preliminary sizing only - not a structural design
SpanRef provides reference span values transcribed from published span tables, plus tools to look them up and organise them, for educational and preliminary-sizing purposes. It is not a structural design, engineering advice, or a code compliance determination, and it is not a substitute for the locally adopted building code or a licensed design professional. Loads, species, grades, moisture, bearing, connections, and openings for a real project can differ from the tabulated assumptions. Always confirm the final member size with your local building department and a qualified engineer or architect before building.
Span data
Span values are reproduced from published, code-recognized tables - the International Residential Code (IRC) span tables and the American Wood Council's DCA6 deck guide - with the source and edition cited on each page. Editions and locally adopted amendments vary; confirm the values against the code edition your jurisdiction has adopted. Figures are provided "as is" without warranty of accuracy or fitness for a particular purpose.
Your data
Your project data is stored locally in your browser. You are responsible for backing it up (Premium includes an export feature). We are not liable for data lost through browser settings, device changes, or clearing storage.
Subscriptions
Premium is offered on weekly, yearly, and lifetime terms through RevenueCat and Stripe. Subscriptions renew automatically until cancelled from the link in your receipt email. Access is tied to the browser you purchase in and can be restored elsewhere with your access code.
Refunds
Not happy with a purchase? Email [email protected] within 14 days of a first purchase, or within 7 days of a renewal, and we will refund it. Send the message from the email address you used at checkout, and include:
- the email address used at checkout (if you are writing from a different address)
- your access code, shown on the Premium page while you are signed in on the browser you purchased from
- roughly when you purchased, and which plan (weekly, yearly or lifetime)
- the last 4 digits of the card, if you have the receipt handy
That is everything needed to find the purchase and process the refund. This policy does not limit any statutory rights you may have.
Changes
These terms may be updated over time. Continued use of SpanRef after changes take effect constitutes acceptance of the revised terms.