A system for absorbing energy in a vehicle includes a pair of laterally spaced upper and lower side rails which extend along a longitudinal axis. The lower side rails are disposed below the upper side rails. An upper member extends transverse to the longitudinal axis and interconnects the upper side rails. A lower member extends transverse to the longitudinal axis and interconnects the lower side rails. The upper and lower members are each disposed to transmit energy from the upper and lower members through the respective upper and lower side rails. The upper and lower members are configured to simultaneously deform upon impact of the vehicle with an object and transfer a force generated from impacting the object to the upper and lower side rails, respectively.