Environmental factors
Position
Middle zone roof
Terrain category
III (villages, suburban terrain, permanent forest)
Height above sea level
< 1000 m
Roofing materials
Concrete
X
= the required ballast is higher than will fit under the system. The system must be mechanically attached to the roof. Please contact Van der Valk Solar Systems.
* If you use tiles of different sizes and thus another weight, you need to adjust the number of tiles to get the right weight.
Panel: maximum dimensions 1800x1100 mm (21 kg)
Panel: maximum dimensions 2100x1100 mm (24 kg)
Windmap Spain
Required ballast | Spain
General
The ValkDouble® mounting system must be reinforced by means of tiles, which must be placed on the
indicated ballast foundations. In three steps you can easily calculate the required ballast;
• determine the wind area on the windmap
• choose the wind area and building height in the table
• you can now read the number of tiles / kg
Note 1: The extra ballast must be equally divided over the ballast foundations.
Note 2: The max. of 16 tiles can be placed for extra ballast (144 kg).
Building height
0 - 5
meter
5 - 7
meter
7 - 9
meter
9 - 12
meter
12 - 15
meter
26 m/s
89,0
104,0
130,0
X
X
kg
10,0
12,0
14,5
X
X
tiles
27 m/s
107,0
123,0
X
X
X
kg
12,0
14,0
X
X
X
tiles
29 m/s
144,0
X
X
X
X
kg
16,0
X
X
X
X
tiles
Building height
0 - 5
meter
5 - 7
meter
7 - 9
meter
9 - 12
meter
12 - 15
meter
26 m/s
121,0
138,0
X
X
X
kg
13,5
15,5
X
X
X
tiles
27 m/s
141,0
X
X
X
X
kg
16,0
X
X
X
X
tiles
29 m/s
X
X
X
X
X
kg
X
X
X
X
X
tiles
Ballast
foundations
