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 Finland
Required ballast | Finland
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
21 m/s
27,0
40,0
51,0
68,0
84,0
kg
3,0
4,5
6,0
8,0
9,5
tiles
22 m/s
35,0
50,0
65,0
87,0
106,0
kg
4,0
6,0
7,5
10,0
12,0
tiles
26 m/s
82,0
117,0
143,0
X
X
kg
9,5
13,0
16,0
X
X
tiles
Building height
0 - 5
meter
5 - 7
meter
7 - 9
meter
9 - 12
meter
12 - 15
meter
21 m/s
38,0
54,0
71,0
95,0
115,0
kg
4,5
6,0
8,0
11,0
13,0
tiles
22 m/s
48,0
69,0
92,0
118,0
139,0
kg
5,5
8,0
10,5
13,5
15,5
tiles
26 m/s
112,0
X
X
X
X
kg
12,5
X
X
X
X
tiles
Environmental factors
Position
Middle zone roof
Terrain category
III (villages, suburban terrain, permanent forest)
Roofing materials
Bitumen
• Mainland across the country
= 21 m/s
• Sea areas:
Open sea, scattered islands on open sea
= 22 m/s
• In Lappland: at the
top
of the mountains
= 26 m/s
• In Lappland: at the
foot
of the mountains
= 21 m/s
Ballast
foundations
