Calcolatore Ghiaia Drenante Gratuito
Calcola il fabbisogno di ghiaia per trincee drenanti e tubazioni di drenaggio.
ft
in
in
in
Gravel Needed
2.6 cu yd
Peso Approssimativo3.7 tons
Total Trench Volume75.0 cu ft
Gravel Needed vs Trench Length
Formula
Drainage Gravel Calculation
Gravel Volume = Trench Volume - Pipe Volume
The perforated pipe displaces some of the trench volume. Subtract its cross-sectional area multiplied by the trench length to get the net gravel volume. Use washed, angular gravel (3/4 to 1-1/2 inch) for good drainage.
Esempio Risolto
50 ft French drain, 12 in wide, 18 in deep, with 4-inch pipe.
- 01Trench volume = 50 x 1 x 1.5 = 75 cu ft
- 02Pipe volume = 50 x pi x (2/12) squared = 2.18 cu ft
- 03Gravel = (75 - 2.18) / 27 = 2.7 cu yd
- 04Weight = 2.7 x 1.4 = 3.8 tons
Domande Frequenti
What kind of gravel for French drains?
Use clean, washed gravel in 3/4 to 1-1/2 inch size. Avoid crushed limestone with fines, as the fine particles can clog the system over time.
Do I need filter fabric?
Yes, wrap the pipe in filter fabric or line the trench with it to prevent soil from migrating into the gravel and clogging the drain.
Impara