A: Sorry. I do not know since I did not use them on grass. I used mine mostly on concrete but I have a few on gravel. My guess is that they will settle over time on grass.
A: I believe one every 16 inches on center
A: When we built our deck we placed them about 3 ft apart
|Brand||Eurotec||Pylex||Eurotec||FENCE & DECK RITE|
|Name||Deck Support Plastic Adjustable Pedestal ECO M - (20-Pieces / Box)||Adjustable deck support multi format 33-66 Black (Pack of 6 Units)||Deck Support Plastic Adjustable Pedestal ECO S - (50-pieces / Box)||2 in. x 4 in. Privacy Fence/Wall Brackets Fits Standard railings Reinforced Black Polypropylene (112-Pieces)|
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