IBC SOLAR AeroFix 10-EW, Installation Instructions Manual

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14
Version 20.01, 20-July-2020
Static friction coefficients
In terms of proof of stability, analysis of the
position stability must be carried out in
addition to the component analysis. For
this, the system must be adequately
secured against lifting off and shifting. A
key factor influencing the proof of position
stability is the static friction coefficient µ
between the solar power system and roof.
The static friction coefficient depends on the materials used, the surface condition (rough, smooth, wet,
dry, weathered), the temperature, the age and the general condition of the roof waterproofing. These
factors must each be incorporated into the consideration of the static friction coefficients and if necessary
lead to reductions.
For preliminary planning purposes, depending on the material combination the following values can be
used as an approximation:
Fleece*
(polyester)
Building protection
mat (rubber-based)
Building protection mat
(aluminium-laminated)
PVC 0,2 0,5** 0,5
Polyolefin (e.g. TPO) 0,2 0,5** 0,5
PE 0,2 0,5** 0,5
PVC, modified 0,2 0,5** 0,5
EVA 0,2 0,5** 0,5
Polypropylene 0,2 0,5** 0,3
Bitumen elastomer/polymer bitumen 0,6 0,6 0,2
EPDM 0,6 0,6 0,7
Tab. 2: Coefficient of static friction µ
* Fleece only partially recommended due to risk of rotting
** Only with the manufacturer’s approval for roof waterproofing regarding the chemical compatibility
(plasticizer migration)
Important information:
The values shown in the table are intended for preliminary planning only!
It is not possible to assess the actual existing and applicable static friction coefficients to prove position
stability without on-site verification
Determining the static friction coefficients
Fig. 11: Coefficient of static friction