The picture above shows the layout of a typical box gutter on a metal roof.
Box gutter regulations nsw.
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.
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 installation will be compliant with relevant regulations.
Peter coll provides a timely update regarding the provision for overflow and box gutter compliance.
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.
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.
But the main reason for its name is because it is boxed in on all sides.
The width of the rainhead is to be at least equal to the width of the box gutter and the box gutter needs to.
Typically a box gutter is trapped between two roofs that feed rainwater into it.
This document is also adopted by nsw fair trading.
Ncc volume two part 3 5 2 a box gutter is typically a gutter that is set into the slope of a roof.
Method for design of eaves gutter systems.
The builder or guttering installer needs to make sure the gutter system is fully compliant with nsw laws and australian standards.
What s in the new guttering legislation.
The page 6 diagram figure 5 shows downpipes 1 3 both serving approximately 15 metres of guttering the gutter length between the high points and downpipes 3 4 are shown as approximately 16 metres apart.
Depth of the box gutter consistent with saa hb39 installation code for metal roof and wall cladding section 5 clause 5 7 3 and figure 5 7 3 to prevent internal flooding or damage to the building or contents see figure 2.
Installing box gutters to achieve compliance with relevant regulations.
The new regulations from the victorian building authority have changed the compliance requirements for guttering to ensure that eaves are not damaged by overflowing water during a major rainfall event.
In victoria the installation of box gutters is regulated plumbing work that must be carried out and certified by suitably registered licensed plumbers.
New regulations went into force on 1st january 2016 to correct this issue.
