{"id":1284,"date":"2025-10-23T14:18:27","date_gmt":"2025-10-23T12:18:27","guid":{"rendered":"https:\/\/wus-online.de\/service\/dimensioning-of-the-roof-drainage-system\/"},"modified":"2026-02-05T14:36:07","modified_gmt":"2026-02-05T13:36:07","slug":"dimensioning-of-the-roof-drainage-system","status":"publish","type":"page","link":"https:\/\/wus-online.de\/en\/service\/dimensioning-of-the-roof-drainage-system\/","title":{"rendered":"Dimensioning of the Roof Drainage System"},"content":{"rendered":"\t\t
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Properly dimensioning roof drainage<\/h1>\t\t\t\t<\/div>\n\t\t\t\t
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Our service tool supports you in the reliable planning of your system.<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Dimensioning of the Roof Drainage System<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Stay up-to-date.\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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Which downpipe (and how many per wall side?) do I need for my construction project?
What does this mean for the selection of suitable gutter brackets up to the next drainage line (…quantity, hole pattern?)?
With its “Calculation aid for dimensioning the roof drainage system”, WUS provides you with an orientation as to what you actually need and \u2014 in what quantities. The regulations of the professional associations must be observed: “Zentralverband des Dachdeckerhandwerks (ZVDH)”, as well as the “Zentralverband Sanit\u00e4r Heizung Klima (ZVSHK)”.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Sizing Guidelines<\/strong>
The sizing of rainwater drainage pipes, and consequently the determination of gutter size, depends on the rainfall intensity, as well as the roof area and the runoff coefficient (slope, surface condition). For dimensioning the roof area, the customer’s specifications are used. Wegen der erh\u00f6hten Verschmutzungsgefahr von Dachrinnen werden Regenfallleitungen, um Eindringen von Niederschlagswasser aus der Dachrinne in das Geb\u00e4ude zu vermeiden, f\u00fcr eine Regenspende von je nach Region mindestens 300I\/(s x ha) bemessen.
Um einen Str\u00f6mungstechnisch g\u00fcnstigen \u00dcbergang von der Dachrinne zum Regenfallrohr gewehrleisten zu k\u00f6nnen, werden nach DIN 1986 – 2 trichterf\u00f6rmige Einl\u00e4ufe verwendet.<\/p>

Rainfall intensity (r):<\/strong>
Rainfall intensity (r) is the measured amount of rain per unit of time, relative to the area in l\/(s x ha).
For the amount of rain, when dimensioning roof drainage systems, the peak load values in a short unit of time and their frequency are significant.<\/p>

Rainwater runoff Q:<\/strong>
Rainwater runoff is defined as the amount of water supplied to the rainwater pipes per second (l\/s).<\/p>

Nominal size:<\/strong>
Size specification for all types of gutters and downpipes, based on the cut width or clear width.<\/p>

Roof footprint (A):<\/strong>
The footprint of an inclined roof projected onto the horizontal plane.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Berechnungs­hilfe f\u00fcr die Dimen­sionierung der Dach­entw\u00e4sserungs­anlage<\/h2>\n <\/div>\n \n \n
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