8
B1
Dimensions
In order to ensure the stability of the PV system against lifting, tipping and displacement, it must be weighted
down with ballast (gravel, concrete slabs, etc.). The expected wind loads must be calculated individually for each
system, as they depend on the building height and the system location.
The required ballast loads have been calculated based on extensive wind tunnel tests and can be taken from
the tables.
The following tables are applicable only with an available attic height of at least 10 cm.
The tables apply for the terrain categories under the Belgian standard NBN EN 1991-1-.
B2
Required ballast load
ca. 150 mm
ca. 150 mm
ca
. 2
8
°
Fig. B1.1
Area
approx. 2. m
2
Weighted area
approx. 1.30 m
2
(contact surface for concrete blocks, gravel, etc.)
