Having worked these calcs for an accident investigation, I can tell you that the strut extension for most of the larger widebodies is about 3', you could safely use 1 meter I think. Those numbers are for the DC-10/MD-11, but I would be surprised if the others are much different.
Of course that would only apply if the struts actually bottom out, and if they do bottom out any residual acceleration will affect the structure in a much different manner.
One other important consideration: The amount of lift being developed by the wings just prior to touchdown must be factored in. If you are at 1.2 g decelerrating just prior it's far different than being at .8g...
[This message has been edited by Prof2MDA (edited 02 December 2000).]