E_MH_Mounting_instructions_Skylux_Climalux
01/11/2017
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Load graphs gutter profiles
For roofs with plastic sheets
The graphs below can be used to determine the free span for each type of gutter (support). This is the distance
between your supports (posts) in function of the load and the depth (D) of your roof. The maximum bending is
1/200.
The load is related to the snow and wind load.
Practical example:
The roof has a width (B) of 4000 mm and a depth (D) of 3500 mm. The prescribed load is 500 N/m² (~ 50 kg/m²).
The roof is provided with muli-walled plastic sheets.
Determine the point in the “500 N/m² & 1/200” graph and select a gutter (support) above this point.
The graph now has two options:
Either you select the gutter GX with reinforcement V822 which allows a free span of 4100 mm.
Or you select a gutter rafter GX for maximum span of 3645 mm. You then have to install an extra post in the
middle for support.
The span is the distance (P) between the posts. In this example, the width can be 4320 mm where the free span
(P) between the posts = 4320 – (2 x 110) = 4100 mm.
The bending in the middle with a load of 500 N/m² is 1/200 or 400/200 = 20 mm. Less if unloaded.
The maximum deliverable length of the gutter profiles is 7 metre.
GX
GX + V822
GDX
GDX + V14105
3000
4000
5000
6000
7000
8000
9000
10000
P
D
350 N/m² & 1/200
3000
4000
5000
6000
7000
8000
9000
10000
P
D
500 N/m² & 1/200
2000
3000
4000
5000
6000
7000
8000
P
D
750 N/m² & 1/200
2000
3000
4000
5000
6000
7000
8000
P
D
1000 N/m² & 1/200
GX
GX + V822
GDX
GDX + V14105
3000
4000
5000
6000
7000
8000
9000
10000
P
D
350 N/m² & 1/200