Box Gutter Design Vba

State of victoria victorian building authority 201 7 published june 201 this fact sheet provides guidance to the building and plumbing industries on designing and installing box gutters to achieve compliance with relevant regulations.

Box gutter design vba.

Therefore it is very important to consult with the roof plumber for the project where the roof frame is designed and a compliant gutter cannot be installed without major roof frame alterations. They are simply described on the vba s box gutter design fact sheet as a graded channel generally of a rectangular shape for the conveyance of rainwater within the building footprint including adjacent to a wall or parapet. In my last article i discussed the emergence of the issue of provision for overflow in external eaves gutters or more specifically the lack of provision for overflow. This is despite the fact that the victorian building authority vba openly disclose that they do not use the bca code as it believes their regulations are far more thorough and make construction in victoria of a better standard for the end customer.

The total flow is used to size the sump and overflow. Overflow provision for box gutters october 2014 the vba has identified several instances of plumbing practitioners failing to install appropriate overflow provision in box gutters and rainheads. Box gutters are an essential part of the roof drainage system. This free online box gutter calculator will calculate the size of box gutters and sumps with a side overflow in accordance with the australian plumbing code as nzs 3500 3 2003 part 3 storm water drainage.

The side with the maximum flow is used to size the box gutter. Peter coll provides a timely update regarding the provision for overflow and box gutter compliance. Architects draftpersons builders and other practitioners responsible for designing a box gutter should work closely with the roof plumbers that will install the box gutter to ensure that the overall design and. Box gutter and overflows.

Plumbers are reminded that roof drainage systems need to be designed and installed with appropriate overflow provision.