Blue Roof Meander FKM 60 System Solution

TECHNICAL DATA

Weight *: starting at 120 - 140 kg/m² or 1.2 - 1.4 KN/m²

Layer height: 120 mm

Roof pitch: 0-5° (0-9 %)

Vegetation form: herbs-grasses-sedum

Water retention: ≥ 80 %

Discharge coefficient: Cs=0.05 - 0.17 **/****

Water storage: ca. 38 - 53 l/m² temporarily

Discharge yield ***: 15-51 l/s x ha

* Depending on the load capacity of the substructure, Optigreen "High Density (HD)" or "Low Density (LD)" substrates can be used. Weight specifications refer to saturated conditions; dry weight is approximately 60 - 70 % of the saturated weight. In accordance with the requirements of the FLL guideline, the specified weight does not take temporary water accumulation into account.

** For the calculation of the dimensions of the pipe we recommend the discharge coefficient Cs = 0.1. Cs= 0.01 determined for 2 % according to the FLL guideline.

*** Determined according to FLL discharge coefficient measurements using a 15-minute reference rainfall r(15) = 300 l/s x ha.

**** Depends on slope and system solution. Determined at 0° according to FLL guidelines