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When choosing a roof gutter system, we should make sure whether troughs and downspouts will be able to collect water from the roof area of our building. For this, calculate the so-called effective roof area, which is to be drained by the system.
Maximum surfaces drained by GAMRAT roof gutter systems in sq. m. of effective roof area (per downspout).
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Roof gutter
system
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75-mm System
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100-mm System
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125-mm System
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Positioning of
down-
spout pipe
|
75-mm trough
Down-
spout of
63 mm
|
100-mm trough
Down-
spout of
90 mm
|
125-mm trough
Down-
spout of
110 mm
|
125-mm trough
Down-
spout of
63 mm
|
|
|
95
|
148
|
240
|
165
|
|
|
48
|
74
|
120
|
82
|
|
|
42
|
50
|
95
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65
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The following formula may be used for calculation of the effective roof area:
S = (B + 0,5 C) x L
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Drainage Capacity of the Gamrat Roof Gutter System
e-mail: 
phone 0048 13 491 60 00
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