Steve,
Any opening in a pressurised fuslage requires the cutout area to be strengthened for obvious reasons.
To answer your question quantitivly regarding 1 ton of force, you would have to know the surface area of the fuselage being touched by the force.
The fuselage is built to stand an pressure of approximately 8.5 Pounds per square inch.
Do the math.
The fuselage can also move sideways when struck.
