The Labour Relations Commission is expected to call both sides in the scaffolders dispute to talks early next week. Attempts to broker a settlement to the five-week strike at informal talks this week have broken down.
Yesterday morning scaf folders in Dublin caused disruption to rush-hour traffic when they blocked O'Connell Bridge.
Further lay-offs are expected at sites this weekend as the effects of the strike continue to bite.
Over 1,000 building workers have been laid off to date.