Five riders advance from each qualifying round. With 86.75 points in the first run and 73.25 in the second, Tjäder finished fourth in the first heat.
Things were worse for other Swedes. Oliver Movenius finished in 20th place, Isak Davidsson one place behind and reigning freeskiing world champion Oliwer Magnusson was third from the end.
In the second heat, the blue-yellow colors are represented by Hugo Burvall.
The final in big air is run during the evening.