Limerick Traveller Development Group said the wall was going to separate members of the Casey family with one family being forced to leave the halting site at Clonlong.
Timmy Casey, 29, said: “We were told by the council four weeks ago that they were planning to throw us out on the road and build a 13 foot high wall around the site. We were told if we did not move we would be forced onto the roadside.”
Mr Casey lives at the Clonlong site with his wife Geraldine and their two children. A third is due in four weeks.
Mrs Casey said: “I am eight months pregnant and the stress of this is unreal. I just want them to leave us here to give us the facilities we deserve and let us be.”
Teresa Casey who also lives at the halting site said: “We deserve to be treated like human beings and not like this.”
Bridget Casey of the Limerick Traveller Development Group said the halting site had been built to accommodate four families.
She said: “At present there are 25 adults and 30 children living on a site with not proper sanitation facilities.”
A spokesman for Limerick City Council said the industrial area had been given planning permission to build a wall and were entitled to do so.
He said they met with the Casey families and were looking to put alternative arrangements in place for them.