Firefighters in Nottinghamshire are set to walk out for eight days later this month in a dispute over pensions.
Members of the Fire Brigades Union will walk out at various times between Monday, July 14 and Monday, July 21.
This is in addition to planned strike action in July 10 - the 15th time the union has walked out since the action over pensions began last September.
Matt Wrack, FBU general secretary, said: "The government must realise that firefighters cannot accept proposals that would have such devastating consequences for their futures, their families' futures — and the future of the fire and rescue service itself.
"We have tried every route available to us to make the government see sense over their attacks.
"Three years of negotiations have come to nothing because the government is simply unwilling to compromise or even listen to reason despite a huge amount of evidence showing their planned scheme is unworkable.
"Shorter strike periods have illustrated the strength of feeling amongst firefighters whilst limiting disruption to the fire service, the public and our members' working lives.
"But the government is merely ploughing ahead, forcing firefighters to react."
Fire authority chairman Darrell Pulk said the longer the dispute continued, the more pressure would be put on dwindling budgets after the Post revealed the cost of the action has already hit £150,000.
He said: "The service is already facing a huge deficit in its budget due to cuts in its Government grant and it is therefore extremely important that we don't deplete essential funds that may need to be relied on at a later date.
"We therefore ask that the FBU and the Government bring this dispute to an end."
The union is opposed to Government plans to increase the retirement age of firefighters from 55 to 60, and the amount they pay into their pensions.
A spokesman for the department for communities and local government said: "By disrupting constructive discussions and an open consultation with further strike action the FBU has once again shown the country it is not serious about finding a resolution.
"The government has made clear that a way forward can be reached, but not under the shadow of industrial action, which only serves to damage firefighters' standing with the public.
"The deal on the table gives firefighters one of the most generous pension schemes in all the public sector, and the proposals protect the earned rights of a higher proportion of members than any other public sector scheme.
The strikes will take place on the following dates and times:
Monday 14 July: 6am–8am and 5pm–7pm
Tuesday 15 July: 6am–8am and 5pm–7pm
Wednesday 16 July: 6am–8am and 5pm–7pm
Thursday 17 July: 6am–8am and 5pm–7pm
Friday 18 July: 6am–8am and 11pm–1am on Saturday 19 July
Saturday 19 July: 11am–1pm and 11pm–1am on Sunday 20 July
Sunday 20 July: 5pm–7pm
Monday 21 July: 6am–8am and 5pm–7pm
