Dublin City Council says it's "very disappointed" that members of Dublin Fire Brigade are going on strike.
Earlier today 80 of the crew who are with IMPACT confirmed they will join SIPTU colleagues on the picket line.
Firefighters will walk off the job on the 18th and 27th of March in the row over breaking up DFB's ambulance service and call centre, and merge it with the HSE's base in Tallaght.
IMPACT's Dessie Robinson says “the proposed break-up risks severing a key link in the DFB emergency medical service chain and reducing its effectiveness. This could result in response time delays, putting lives at risk. We believe this is going directly against the advice of Dublin’s chief fire officer who has confirmed the importance of maintaining the fire EMS model."
The trade union says it remains open to meaningful discussions with Dublin City Council, to prevent any escalation in the dispute.
The City Council says it's taking the action in the interest of patient safety, following a HIQA report deemed that the ambulance services were not configured in the best possible way.
The local authority has asked the Workplace Relations Commission to intervene in the dispute.