On-roof fitting and installation 4
0020100571_03 auroTHERM, auroTHERM plus Installation manual
11
4.1.6
Determining the number of required roof
brackets
1.
Ask the local building authority for the regional max-
imum snow load s
k
.
Conditions
: Maximum snow load:
≤
3 kN/m
²
▶
Install 4 roof brackets per collector.
Conditions
: Maximum snow load: 3 … 4.5 kN/m
²
▶
Install 6 roof brackets per collector.
Conditions
: Maximum snow load: > 4.5 kN/m
²
▶
Compile statistics for the individual case.
▶
Ensure that the maximum permissible snow load per
collector is 5.4 kN/m
²
.
Note
The maximum permissible load per roof
bracket type S/type P is: F
max
= 1.875 kN.
2.
If you are using extension sets, ensure that the roof
bracket is positioned centrally with equal clearances.
4.1.7
Defining the edge clearances of the roof
brackets
Maximum lift points caused by wind loads can occur at
the cut-away edges of wall and roof areas (e.g. verge and
eaves). These maximum lift points result in high loads on the
collectors and installation systems.
Areas in which lift points occur are called edge areas. Corner
areas are zones in which edge areas overlap and especially
high pull forces occur.
Edge and corner areas must not be used as installation
areas.
e
lang
e
kurz
h
b
l
b Building width
h Building height
l
Building length
▶
Calculate the building width w, building height h and
building length l.
▶
The values for the edge clearances to be observed, e
short
and e
long
can be found in the following tables.
b
[m]
h [m]
5
6
7
8
9
10
11
12
13
14
15
8
1.0
9
1.0
10
1.0
11
1.0
1.1
12
1.0
1.2
13
1.0
1.2
1.3
14
1.0
1.2
1.4
15
1.0
1.2
1.4
1.5
16
1.0
1.2
1.4
1.6
17
1.0
1.2
1.4
1.6
1.7
18
1.0
1.2
1.4
1.6
1.8
l
[m]
h [m]
5
6
7
8
9
10
11
12
13
14
15
10
1.0
11
1.0
1.1
12
1.0
1.2
13
1.0
1.2
1.3
14
1.0
1.2
1.4
15
1.0
1.2
1.4
1.5
16
1.0
1.2
1.4
1.6
17
1.0
1.2
1.4
1.6
1.7
18
1.0
1.2
1.4
1.6
1.8
19
1.0
1.2
1.4
1.6
1.8
1.9
20
1.0
1.2
1.4
1.6
1.8
2.0
▶
When installing the roof brackets, observe the calculated
edge clearances.
4.1.8
Defining the roof bracket clearances
The roof brackets have different clearances depending on
the array configuration of the collectors (adjacent or on top of
each other).
