Gutter Cross Sectional Area

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.

Gutter cross sectional area.

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. Refer to the table below for the minimum round and rectangular downpipe size for the quad gutter you plan to use. See table 2 for allowable conductor cross sectional areas. Circular 70mm rectangular min.

Then read off the gutter size for the roof pitch of 45 see figure 3. 1 500 2mm in 1m minimum downpipe. All stramit rainwater products confirm with or are equivalent to as2179 1. Sizing of minimum downpipe size relates only to the cross sectional area of the chosen gutter.

Catchment area per downpipe based on the above flow capacity is given in table 3 1j. Effective cross sectional area with 10mm free board. The gutter area shown in the program is the effective cross sectional area. Area a at 38 m.

Cross sectional area of 2835mm smallest dimension at least 50mm. 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. 112 litres min minimum recommended fall.

7500mm with 15mm free board flow capacity. Catchment area per downpipe based on the above flow capacity is given in table 3 1g. The eaves gutter selected is quad spouting with an effective cross sectional area of 6125mm 2 installed with a slope of 1 500. 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.

Horizontal supports shall be supported at each end and at intervals not exceeding 10 feet. 79 litres min minimum recommended fall. 1 500 2mm in 1m minimum downpipe. Cross sectional area 8435mm.

Cross sectional area of 4125mm smallest dimension at least 50mm. Effective cross sectional area. 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. The following tables are intended to assist designers in determining the size of eaves gutters required in accordance with as nzs 3500 3 2003.