MSPs must wait for metallurgical tests on a faulty bolt and socket to be completed before understanding the full implications of the accident in RMJM and Enric Miralles' landmark.
Structural engineer Arup has charged a 'recognised testing house' with finding out why the beam came loose from its metalwork supports and dangled above the heads of politicians.
Meanwhile, the hunt is on for a new temporary venue to house parliamentary debates, which were moved out of the building's chamber after the debacle.
The Hub, the current location for parliamentary business, is only available until the end of this week.
A Scottish Parliament spokesperson said: 'Key questions remain on cause, remedy and therefore resolution.
'The chamber has to be back in business at Holyrood as quickly as possible.'