The capacity of Scotstoun stadium will be increased to over 9,000 for Glasgow Warriors' Pro12 game with defending champions Ospreys.
Gregor Townsend's men play the Welsh side on 19 April and the new, temporary west stand seats around 4,200 people.
It will stay in place for the Glasgow sevens, which is being held at Scotstoun on 4 and 5 May.
Warriors are currently top of the Pro12 and are hoping to secure a play-off spot, with just three games remaining.
Their next league game is against another Welsh outfit, Scarlets, in Llanelli on Friday.