Gutter Profile
Effective Cross
Sectional Area
Capacity (mm2)
Total Cross
Sectional Area
(mm2)
Round (dia mm)
Rectangular/
Square (mm)
Quad
115mm Quad
5,621
6,760
90
100 x 50
115mm Quad - Slotted
5,057
6,192
90
100 x 50
115mm Quad - Low Front
4,307
5,429
75
75 x 50
125mm Quad - NSW
6,488
7,833
90
100 x 50
125mm Quad - SA/NT
6,697
7,958
100
75 x 75
125mm Quad - Slotted
5,592
6,842
90
100 x 50
150mm Quad
8,685
10,088
125
100 x 75
175mm Quad
12,213
13,767
125
100 x 100
OG
125mm OG
4,432
5,609
75
75 x 50
125mm OG - Slotted
3,374
4,432
65
75 x 50
150mm OG - Slotted
5,763
7,055
90
100 x 50
Half Round & Smoothline
150mm Smoothline
8,748
10,124
125
100 x 75
150mm Smoothline - Slotted
6,961
8,332
100
100 x 75
150mm Half Round
7,703
9,176
100
100 x 75
150mm Half Round - Slotted
7,126
8,597
100
100 x 75
Square
VC
5,712
6,893
90
100 x 50
VC - Slotted
4,412
5,594
75
75 x 50
LO-Square - Slotted
4,447
5,624
75
75 x 50
VFC
6,775
7,957
100
100 x 75
VFC - Slotted
5,475
6,657
90
100 x 50
VF - SA
7,839
8,970
100
100 x 75
VF - WA
7,333
8,444
100
100 x 75
VF - Slotted
5,475
6,657
90
100 x 50
HI-Square - Slotted
5,974
7,155
90
100 x 50
C-Square - Slotted
5,974
7,155
90
100 x 50
VT - Slotted
6,338
7,583
90
100 x 50
VFM - Slotted
6,711
7,888
100
100 x 75
Miscellaneous
Edge Gutter
14,856
16,833
-
-
Edge Gutter WA
9,151
10,936
-
-
HK
5,394
6,590
75
100 x 50
HK - Slotted
3,717
4,816
75
75 x 50
S
5,315
6,358
75
100 x 50
S - Slotted
4,609
5,622
75
75 x 50
Clickform - Slotted
5,102
6,303
90
100 x 50
450mm Girth OG Big One - Slotted
9,881
11,551
125
100 x 100
600mm Girth OG Big One - Slotted
26,345
28,615
125
100 x 100
Quarter Round
6,292
7,577
90
100 x 50
Quarter Round - Slotted
5,054
6,309
90
100 x 50
Table 2 | Cross Section Area
(mm
2
)
Minimum Downpipe Size
