What is the extent of standing (qiyam) in the rak'ahs in which the recitation of Al-Fatiha is not obligatory in the Hanafi school of thought?

The Hanafi school holds that it is sunnah to recite Surah Al-Fatiha in the third and fourth rak'ahs of a three or four-rak'ah prayer. The sufficient standing in this case is what is referred to as "standing." Al-Tahtawi said: "The obligatory (standing), according to the narration of the original texts, is absolute standing."