No it wouldn't. The ceiling blocks are cut into the top wall course which itself has zero "slippage ratchet" system.
If it could slip, the ceiling blocks along with the unrestrained top course and probably the entire GG shebang would all go crashing down and northwards.
Also there's no "ratchet, anti slip" system above the AP or the DP.
According to M&R the ceiling blocks are angled at 28 deg. and 11 min. to the horizontal.
They did it for a reason.
Angle of incidence and reflectence an all.
If those ceiling blocks were mirrors, and you stood at the bottom of the GG and looked up, You 'may' see the top of the GG and the antichamber passage reflected in the ceiling in each and every mirror.
What If the corbelled walls were also mirrors???
Edited 1 time(s). Last edit at 15-Dec-16 17:21 by Jon Ellison.