| |
|
Thermal Movement
Changes in temperature
produce thermal movement in Foamalux and Foamalux Ultra panels.
The amount of movement is a product of the sheet dimensions, temperature
change and the coefficient of linear expansion, 0.076mm/m°C.A 2440mm
long panel will expand by 3.71mm as the temperature rises from 7°C to
27°C, a temperature differential of twenty degrees.
Significant temperature changes will occur in all exterior applications; there may also be internal
applications where variation in temperature is considerable. Thermal movement must therefore always be accommodated in whatever means of fixing is used. In Appendix 1 examples are given of how to calculate changes in sheet dimensions with temperature change. Adequate fixing hole and slot sizes which will accommodate thermal movement are given in Appendix 4.
The service temperature range limits, -20°C and + 60°C, form the basis for the overall temperature differential range of eighty degrees.
IMPORTANT
NOTICE
This information and software is believed by Brett Martin Limited
to be accurate and reliable as of October 2001. However, since
this
information and software furnished by Brett Martin Limited is
provided without charge, and since use conditions are not within
Brett Martin Limited's control, Brett Martin Limited assumes
no obligation or liability for such information, software or
use of either; no warranty, express or implied, is given nor
is freedom from any patent,copyright, trademark or trade secret
owned by Brett Martin Limited or others to be inferred.
Brett Martin Limited does grant, to the extent it is able, the
right to user to use the software and the software's results.
It is the users responsibility to determine whether this information
and software is appropriate for user's purpose. |
In practice, Foamalux and Foamalux Ultra will be used in conjunction with many common building and accessory materials, the thermal expansion properties of which must also be taken into consideration. The graph below illustrates the relative coefficients for various materials. Foamalux clearly expands much more than timber, concrete, brickwork and metals when their temperature is changed by the same amount.
Low Temperatures
As temperatures fall to freezing point and below, all PVC sheet materials become less pliable and more brittle, therefore more susceptible to damage through rough handling and impact.
Foamalux and Foamalux Ultra should be handled with care in cold weather; all knocks and excessive twisting and bending should be avoided.
When cutting, drilling or performing any other operations, care must be taken in colder conditions. |
|
|
