Høiåsmasten is a TV tower used for DAB-, GSM-, FM- and TV-transmission near Halden, Norway. Høiåsmasten, built in 1980, is one of the tallest partially guyed towers in the world and with a height of 320 metres (1,050 ft) the second tallest tower of Norway. It consists, like the Gerbrandy Tower, of a concrete tower as basement on which the antenna mast, guyed to the ground, is mounted.