Construction began in May on the new K-8 school at 452 W. Francis St., the fifth elementary school in the district.
Board members, school district employees and construction workers gathered to sign the 12-foot-long steel beam.
The 800-pound beam will become part of a column supporting a canopy for a clock tower at the main entrance to the school. A concrete pedestal and brickwork will completely enclose the steel.
After signing the beam, school representatives and construction workers were treated to a pizza party.
The $30 million Altamont School is expected to open at the end of summer. It will eventually have nearly 900 students.