The contractor placed this floor they used plastic chairs on 2 to 3 foot centers. They used 2 kinds of plastic chairs the rigid plastic chair which the clips break off when someone steps on and the flexible chairs (they are expensive) which come back up about 80% when stepped on or ran over...
Thanks for the input.
I agree that most mesh end up at the bottom of the slab.
I also think that a 4" floor with mesh is not much better than a 4" plain concrete floor because of this.
I worry about damage to the vapor barrier with wire chairs.
I remember having a guy at the WOC saying how can...
What are most people seeing the contractor do when this type floor is specified ?
How close do you need the chairs to hold mesh this light of mesh in place. 12" ? Does anyone allow the contractor to walk in mesh or pull up mesh ? How can the contractor get the chairs in place in an enclosed...
Is the 57 stone crushed or round ?
In general a bad idea.
I have found that the pavement can have settlement issues under parked cars the asphalt can push in the the voids in the summer.
If you intend to bond the new concrete to the old concrete surface I would sugest get a petrographic analysis to determine the depth to be removed to achieve a good bond.
Over the years I have worked on a number of houses that were constructed on top of crushed concrete. In some cases they have continuing problem with build up of calcium in the sump pump and pipes. We have measured the ph in the water in these sumps and found it to be about 8.5 to 9. Normal in...