[DMFrank]

I think that if you read section 2.2.5 of the game manual, the pyramid is described as being secured to the floor via steel plates.

"The PYRAMID has four (4), 24 in. square, 11 GA. (.120 in.) steel bases with hook and loop tape (“hook” side) on the bottom. These bases secure the PYRAMIDS to the carpet. To prevent damage to venue floors, these metal bases are surrounded by floor protectors. These floor protectors are made from 1/8 in. thick hardboard. The floor protectors begin 12 in. outside of all the PYRAMID bases and continue to cover the floor underneath the PYRAMID (not including the bases themselves). Additional carpet covers both bases and floor protectors and is held to the carpet using 2 in. wide, Black gaffers tape. The protectors and carpet create a 1/4 - 3/8 in. lip around the PYRAMID."

I think the important part is that last sentence: "The protectors and carpet create a 1/4 - 3/8 in. lip around the PYRAMID."

So the Pyramid is on that lip and technically not the floor as seen in figure 2-8: PYRAMID Floor Protectors.