"This is a major victory for us," union official Issac Ntshangase said in a statement.

The strike in the construction industry, one of several in a number of sectors, had appeared to have a relatively small impact, with many workers refusing to heed union demands to down tools and many building sites remaining active.

Major South African construction firms include Aveng Ltd (>> Aveng Limited), Murray & Roberts (>> Murray & Roberts Holdings Limited) and Group Five (>> Group Five Limited).

Workers in the motor and gold industries have returned to work after strikes that crippled operations at some of the country's biggest producers were resolved last week.

Airline technical workers also returned to work this week, while an ongoing strike by petrol station attendants has caused little disruption so far in Africa's top economy.

With the unemployment rate stuck at about 25 percent for years and poverty gripping millions, many South Africans have said they are more concerned with securing a paycheque than heeding the strike calls of union bosses.

(Reporting by David Dolan; Editing by Pascal Fletcher)