When a character that is not Strong holds a heavy weapon or wields a large shield, the weapon or shield is treated as the character’s arm for the purposes of wounds. Any attack that hits the weapon or shield counts as if it struck the character’s arm, and it will immediately disarm them. Furthermore, characters without Strong obviously cannot make attacks or use combat abilities with such weapons and shields. You should role play this out, but be careful to not damage the phys rep by dragging it carelessly along the ground.