LANCASTER, Pa., April 9 (Reuters) - Building materials company Armstrong Holdings Inc. on Monday said Marc Olivie, president and chief executive of its Armstrong Floor Products unit, was resigning to join American Standard Cos. Inc.

American Standard, a Piscataway, N.J.-based maker of plumbing, truck braking and air-conditioning systems, said in a separate statement Olivie would serve as president of its global plumbing sector.

His resignation is effective April 30.

Olivie joined Armstrong in 1996 as president of Worldwide Building Products Operations, the company said.