AIB League Division One leaders Shannon have secured a home semi-final tie and relegated Greystones thanks to 38-5 win over bottom side at Coonagh
Greystones head straight back to division two and will be joined by Lansdowne whose 27-20 win over Terenure in Lakelands was not enough after Dungannon recorded 38-7 win over Ballymena at Eaton Park.
A 25-03 win over Dolphin at Temple Hill sees Cork Constitution stay top.
Third-placed Garryowen won't get that home semi-final but were comfortable winners of over UCD by 34-13 at Dooradoyle.
Clontarf claimed the final semi-final berth with a 37-14 win over Galwegians at Castle Avenue.
Blackrock needed a big win and other results to go their way if a play-off place was to be secured but despite a 49-27 win over St Mary's at Stradbrook they could only make fifth.
In the day's only game with nothing at stake, Old Belvedere beat UL Bohemians 33-18 at Anglesea Road.
In the Division Two final UCD have claimed the silverware with an 18-8 win over promoted Young Munster at Donnybrook.
Earlier at the same veue, Bruff suffered their first defeat, losing out to Instonians in the Division Three final.
Both sides have already secured promotion but the 32-23 defeat to the Belfast side will take some of the gloss of the Limerick club's campaign that saw them concede just 56 points.
