Blocking stones wedged from behind, copper pins are handles

January 12, 2026

EgyptTechnology

Source: Finishing the Great Pyramid's Air-Channel Saga by History for GRANITE

Site mentioned

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The Djedi Robot mission (2010-2011) revealed how blocking stones were installed: wedged from behind on a small ledge, not slid from above. The copper tools found on the exterior? They served as implements for insertion and removal. The same groove system was found in the Queen's Chamber southern shaft. 🛠️🔩

Key facts

2011 Jetty Robot mission found blocking stone supported by 3mm ledge in west wall
Superficial cracks in ceiling span both sides of slab
Stone was inserted by wedging from behind, not sliding from above
West wall behind slab has slightly rougher surface showing insertion method
Channel end was tapered slightly for tight fit
Copper loops allow claw end of hammer to give lateral leverage to free block
Grooves found in King's Chamber southern channel served same blocking purpose