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.
Box gutters vba.
Plumbers are reminded that roof drainage systems need to be designed and installed with appropriate overflow provision.
Allowable box gutter width slope and length required by the australian plumbing code as nzs 3500 3 2 box gutters allowable width slope and length to as nzs 3500 3 2018 stormwater drainage acceptable solutions.
Part d1 of the pca and contains sections on box gutter systems and roof drainage systems installations.
The side with the maximum flow is used to size the box gutter.
These v gutters are being installed to fit the building design.
Background there have been numerous instances where practitioners have installed v shaped gutters instead of box gutters.
This has become a big issue in the past few months particularly in victoria and is going to be a new section in the upcoming.
Box gutter design pdf 692 39 kb changes to mechanical services and refrigerated air conditioning work pdf 289 92 kb mechanical services and refrigerated air conditioning classes.
Box gutters plumbers must install a box gutter system in accordance with as nzs 3500 3 as nzs 3500 5 hb 114 and hb 39.
New scopes of work and registration licence requirements under review fact sheet handheld sprays and water points adjacent to water closets pdf 810 04 kb.
Box gutters are an essential part of the roof drainage system.
Peter coll provides a timely update regarding the provision for overflow and box gutter compliance.
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.
The total flow is used to size the sump and overflow.
From recent audit activity and discussions with industry the victorian building authority vba is concerned that many plumbers may be unaware or uncertain about the regulatory requirements for overflow provision in eaves gutters.
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.
