Carter Holt Harvey

Multinational timber industry giant Carter Holt Harvey has indefinitely locked out about 150 workers who are members of the Electrical Trades Union; Construction Forestry Mining and Energy Union; and the Australian Manufacturing Workers Union at the company's Myrtleford plyboard manufacturing site.

The lock out began at 2.30am on April 19.

It follows a breakdown in enterprise agreement negotiations between the company and unions.