Catchment area per downpipe based on the above flow capacity is given in table 3 1g.
Gutter cross sectional area.
Sizing of minimum downpipe size relates only to the cross sectional area of the chosen gutter.
Cross sectional area of 2835mm smallest dimension at least 50mm.
Cross sectional area of 4125mm smallest dimension at least 50mm.
The eaves gutter selected is quad spouting with an effective cross sectional area of 6125mm 2 installed with a slope of 1 500.
The gutter area shown in the program is the effective cross sectional area.
Circular 70mm rectangular min.
Clause 3 5 4 in the australian plumbing code dictates that the effective gutter cross sectional area shall be taken as the area beneath a line not less than 10 mm below the overflow e g front bead gutter back or bottom of overflow slots.
Horizontal supports shall be supported at each end and at intervals not exceeding 10 feet.
In this case the cross sectional area of a section of gutter is approximately 7 000 8 000 mm so a 125 70 mm gutter 8 750 mm will meet.
7500mm with 15mm free board flow capacity.
112 litres min minimum recommended fall.
Effective cross sectional area with 10mm free board.
79 litres min minimum recommended fall.
Refer to the table below for the minimum round and rectangular downpipe size for the quad gutter you plan to use.
The following tables are intended to assist designers in determining the size of eaves gutters required in accordance with as nzs 3500 3 2003.
Area a at 38 m.
Circular 80mm rectangular min.
Cross sectional line drawing.
Determine downpipe size from table 3 3 in as nzs 3500 3 the minimum size downpipes compatible with spouting of 6125mm 2 cross sectional area installed at a 1 500 gradient are 90mm diameter round or 100 x 50.
All stramit rainwater products confirm with or are equivalent to as2179 1.
Then read off the gutter size for the roof pitch of 45 see figure 3.
Sum of the cross sectional area of all conductors contained in the wireway at any cross section shall not exceed 20 of the interior cross sectional area of the wireway.
See table 2 for allowable conductor cross sectional areas.
1 500 2mm in 1m minimum downpipe.
Box gutter 125mm conceals the sheet ends at the eave line and looks great with profiled longrun sheeting or tile roofing internal and external brackets are available in this profile and it is suitable for use with fascia 185 fascia 155 and fascia 135.
Effective cross sectional area mm2 of eaves gutter gradients of 1 500 and steeper.
Cross sectional area 8435mm.
This is an external gutter so using clause e1 figure 15 plot 38 40 m plan area on the vertical axis.
