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Edge
Engagement, Thermal Expansion.
Edge Engagement
Each rebate detail must allow enough depth to include the expansion
allowance plus a sufficient sheet edge engagement to prevent sheet
'pop-out' from the frame. |
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Expansion
Allowance
Care must be taken when cutting sheets to allow space for thermal
expansion to avoid stress or bowing with temperature change (see table
below). Allowance must be made in both length and width. In vertical
installations the expansion allowance must be left at the top of the
frame and at both sides. |
Thermal
Expansion Calculator
In practical terms it is necessary to allow 3.5mm/metre length or
width for thermal expansion. The Calculator below gives the amount
of thermal expansion allowance which must be made for given lengths
or widths of sheet. |
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. |
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