[TowerTalk] Rebar cage for tower footing

[Bob Gates]

I've noted the UST footing design for most/all their towers, and they specify a
rebar cage with the vertical pieces set approximately 3" above the bottom of the
footing.  This is obviously a clumsy undertaking in the real world, because it
would entail pouring 3" of concrete in the hole, let it set up, insert the cage
and continue the pour.  After 30 years in the construction business, I've seen a
few footings poured, and many were designed by engineers who never had to
actually install their designs, such as spread footings which are extremely
labor intensive, and for no reason.  To make a long question short, any civil
engineers out there who see a problem with the rebar cage sitting on the dirt
floor of the hole and pouring around it?

Regards,
Bob KG7KW