Howard (my excavator) tells me those Big Foot forms can be a major PIA to get properly placed and if you're over ledge it's best to skip them.
Where I want to put our barn/workshop is over ledge, soil depth varies from <2' to 4' so frost is a concern. I'll pin piers to the ledge and possibly float separate slabs for the aprons and vehicle bays.
But I'm not 100% committed to a design until I've cleaned off enough ledge to see what's needed to channel ground water. There's water less than a foot down in the spring. :rolleyes:
Anyone ever rent a rock crusher?
