Analysis of the phenomenon
Wooden windows and exterior doors - Stability of doors and patio doors
Article REF: C3616 V1
Analysis of the phenomenon
Wooden windows and exterior doors - Stability of doors and patio doors

Author : Marcel DENANCÉ

Publication date: August 10, 2004 | Lire en français

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1. Analysis of the phenomenon

Two phenomena are responsible for door instability (figure 1 ):

  • expansion, which affects wood but also other materials;

  • longitudinal shrinkage of wood and wood products.

In both cases, we have a relative elongation dL of one face with respect to the other and therefore a curvature whose deflectionf (in mm) is given by the following relationship : f=LdL8e

with :

L (mm)
 : 
length over which...
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