The unions outlined their plans at a briefing on Thursday three weeks after the tragedy at the Lisbon Bank building.
Employees affiliated to the PSA have refused to occupy that building claiming that it meets just 20% of the necessary safety regulations.
Khathutshelo Muedi died along with two colleagues while trying to extinguish the fire on the 23rd floor of the government building last week.
The firemen lost their lives exactly a week ago when an inferno engulfed the top floors of the Lisbon Bank building in the CBD.
The fire broke out just after 4am on Tuesday. The cause of the blaze is not yet known.
The fire broke out on the 23rd floor of the building on Wednesday last week and damaged as many as nine other floors in the building.
Three firemen died while trying to extinguish the fire that broke out on the 23rd floor of the Lisbon Bank building in downtown Johannesburg.
The family of the firefighter who plunged to his death while fighting a fire at the Lisbon Bank building in the Joburg CBD, Simphiwe Moropane, have visited the spot where he died.
Simphiwe Moropane tripped while trying to make his way through the thick smoke on the top floor of the Lisbon Bank building on Wednesday.
