Denis Booth will bury his brother, Michael, of Gunning, on Wednesday. The lungs and kidneys of Michael Booth were harvested after the 48-year-old allegedly suffered an electric shock while driving a truck at a worksite in Turner.

Mr Booth said his brother's gift would stop three other families from having to plan funerals.

''There is nothing nice about his accident, but the one light is that he was an organ donor,'' Mr Booth said. ''He was an organ donor but I didn't know that and they asked me if I wanted to support his wishes. I thought if that was his wish I'll have to support it. So I did.''

About 1200 Australians are waiting for organs. More than 100 die each year before a donor organ becomes available.

Only 2 per cent of Australians die in a manner which makes organ donation possible.

Mr Booth said he would not have closure until an investigation into his brother's death was complete.

''I joined the navy in 1968 when he was four … We didn't grow up together but he was my brother,'' Mr Booth said.

He said goodbye to him in a Sydney hospital on Monday when doctors told him there was no hope.

''On Wednesday his heart gave out so he was on life support to harvest his organs … He did a marvellous thing. Just marvellous. I think it's outstanding.''

Mr Booth's death is being investigated by ACT Workcover. Commissioner Mark McCabe said construction workers were more likely to be injured at work than other professions.

''I can't talk about the specifics of this case but no one should have to worry their loved one won't come home from work, but construction workers' families have to wonder,'' Mr McCabe said. ''Public servants, even journalists, are far less likely to die in workplace accidents.''

Michael Booth will be buried in Gunning next to his father.