Three judges at Mecca’s criminal court will hear the defendants’ testimonies, informed sources said.
Preliminary investigations into the case have concluded and the case has been referred to the criminal court, they said.
Saudi Arabia had earlier said that a number of engineers and two local officials would stand trial over the case.
On September 11, 2015, a massive construction crane collapsed into Mecca’s Grand Mosque, killing 111 pilgrims, including 11 Iranians, and leaving over 200 others wounded.
Saudi Arabia has been increasingly under criticism for its failure to ensure the safety of Hajj pilgrims.
Less than two weeks after the collapse of the crane, thousands of pilgrims died on September 24, 2015, in a crush in Mina, near Mecca, during the Hajj pilgrimage.
The incident marked the worst ever Hajj-related tragedy.