The GDO is now go! | Australian Building Codes Board

The GDO is now go!

Wednesday, 12 April 2017

Image of a residential houses gutter and downpipe

The Gutters, Downpipes and Overflow (GDO) Calculator is now available.

The calculator assists in developing a better understanding of the NCC Volume Two, Part 3.5.2 Gutters and Downpipes Acceptable Construction Practice (ACP) provisions.

Using the GDO Calculator is easy

To use the calculator simply enter information about the location, roof design and types of overflow measures, and the calculator will provide the gutter type/s required, allowable downpipe sizes and whether the selected overflow measures are adequate.

The Calculator is a MS Excel 2013 for Windows file and uses data contained in NCC Volume Two.

Thank you

Thank you to interested stakeholders for your valuable feedback on the Beta version of the calculator.

Download the calculator and try it for yourself!

FAQs View all

How do I reset my password?

Visit the Request Password Reset page (http://www.abcb.gov.au/User/Request-Password-Reset) on this site.
Enter your existing email address (the one you registered with).
Select the yellow 'Request Password Reset' button. If successful the ‘Email Sent!’ wording will show and you will then receive a verification email to the email address you identified.
Upon receipt of the email you should click on the 'Click Here to reset your password' link. This will take you to the Reset Password page.
Then enter a new password and select Reset Password. If successful the ‘Password Reset Success!’ wording will show and you will be able to access the NCC and archived volumes.
A confirmation email will also be sent to you once the reset is successful.

What is the NCC?

Detail information about the NCC and how it works is available under the NCC section of this website.

How do I access the NCC?

Individuals can register for access to the free digital NCC by selecting the register button at the top of this webpage. Registrations are for individuals only; there will be no shared access for organisations. Each registration will have its own unique login details based upon a user's email address, which requires verification before access is granted.

What is the free "digital" NCC?

As of NCC 2015 the ABCB's free NCC 'digital' service includes online access and a printable PDF download, which allows individuals to print all or part of the NCC volumes as required.

Can I purchase a hard copy of the NCC from the ABCB?

No. As of NCC 2015, the ABCB will no longer produce hard copy versions. Instead, users have the option of printing the complete NCC set or individual volumes from PDF files in A4 format. Printing has also been enabled within the online service. Alternatively, individuals can arrange for a copy to be printed through their local print/copy shop for personal use, utilising the downloadable PDF.

Can I get access to previous NCC/BCA/PCA editions for free?

Yes. From 1 May 2015, all registered users have access to digital copies of past NCC, BCA and PCA editions.

Can I purchase a hard copy of NCC elsewhere?

Yes. A list of commercial outlets selling the hardcopy NCC is detailed in the NCC section of this website under Commercial Providers.