A 10-foot-high bullet barrier is being built alongside a schoolyard to protect teachers and students from frequent street gunfire.

Construction of the 300-foot-long concrete wall at Lindbergh Junior High School begins this week, its $160,000 cost financed by the school district and Los Angeles County."It's really sad that something like this has to be done. But it's needed in today's society," said Principal Max Fraley.

One side of the school, where the recreation areas abut the 713-unit Carmelitos Housing Project, has been vulnerable to gunfire. Physical education teachers say the wall is long overdue.

When it is completed, teacher Trish Ryan said, she will celebrate by hanging a sign reading: "The Great Wall of Lindbergh."