A memorial will be unveiled for 21-year-old Ben Catanzariti on Sunday, one year after the concreter's life was tragically cut short by an accident at a Kingston construction site.

Catanzariti was working at the Dockside apartment development in Kingston when he was struck by a 39-metre concrete boom pump and died at the scene.

The death sparked investigations by police and WorkSafe ACT.

On Sunday, a park bench and bubbler will be dedicated to Catanzariti's memory at the site. The bench was handcrafted by a family friend from Catanzariti's home town of Griffith.

''We are honoured by what they've done,'' Catanzariti's mother, Kay, said.

''It's like it was yesterday.''

Catanzariti's family will attend the ceremony, which will also act as a campaign launch to encourage young people to take out a will when they turn 18.

Catanzariti's death without leaving a will has resulted in a complex legal dispute. Mrs Catanzariti said the absence of a will could cause extra grief for a family.

The national campaign by the ACTU will target school students.

Mrs Catanzariti has also set up a Facebook page, ''When There's a Will, It's Your Way''.

She said 15,000 posters would be distributed to public and private schools.

Mrs Catanzariti has already approached 20 schools in Griffith and said she believed the topic of wills should be raised in schools.

''When you are grieving for the loss of a child, or any loved one, the extra heartache is enormous, especially if they don't have a will,'' she said.

The Construction Forestry Mining and Energy Union said Sunday's memorial would be a reminder that ''workplace safety should not be something we take for granted''.

''No one should go to work and not come home,'' ACT secretary Dean Hall said.

ACTU president Ged Kearney said: ''At 21 years old, Ben was young when he passed away.

''Like many other young people, the last thing on his mind would have been that he would die and should have a will.''

Ms Kearney said employers should always ensure they have a safe work site.

''Employers have a great responsibility to make sure workers on site are safe and, when they fail this duty, lives are lost,'' she said.