sentences:  Prior to a June 1995 expansion, the concert capacity was 30,000.As a concert venue it is not always thought of as best, due to lack of seating and limited sightlines once well back in the crowd, but it offers larger capacity than the indoor Oslo Spektrum and is sometimes deemed preferable to Ullevaal Stadion due to having a concrete floor that cannot be damaged by stage and moving equipment as can that football ground's more delicate turf.It was the main arena for the Bandy World Championship 1985.