Vehicle pillar reinforcement construction for side impact

A side structure for a vehicle comprising:

• a sill;
• a header spaced apart from said sill;
• a pillar extending between said header and said sill and defining an inner channel having a lower portion disposed proximate to said sill and an upper portion disposed proximate to said header, said lower portion being formed from a first material having a first ductility;
• a reinforcement member formed from a second material having a second ductility less than said first ductility, said reinforcement member being received within said lower portion of said inner channel and attached to said pillar proximate to a junction of said pillar and said sill;
• and
• an insert received in said inner channel and including a first portion disposed proximate to said sill and overlapping with said reinforcement member such that said reinforcement member is between said lower portion and said first portion, and a second portion disposed proximate to said header and defining a plurality of ribs.