Some of the toughest union workers in Australia have joined a growing campaign to stop violence against women.
CFMEU national construction secretary Dave Noonan says the union wants to play a role in addressing what's a major community issue and he launched its campaign at the union's conference on Tuesday.
"There are far-reaching effects of family violence on women, children and families," he said in a statement.
"As a union with a large percentage of male members, we are in a unique position to communicate with men and we feel that we have a responsibility to stand up and speak out on this issue."
The CFMEU campaign includes running ads that say "Real men don't abuse women".
The move comes after Victoria Police chief Ken Lay called on high-profile men and groups to speak out against domestic violence.
In July, Victoria Premier Denis Napthine, Melbourne Lord Mayor Robert Doyle and AFL chief Andrew Demetriou joined the push to end family violence.