05-03-2020, 08:49 AM
Join Date: Apr 2005
Location: Brentwood, CA, USA
iTrader Positive Rating: 100%
| | Re: Rock/substrate weight - how much is too much?
Rocks vary a lot in their density. The lower their density the more they are buoyed up by the displaced water. I have always assumed there is a limit on the weight of hardscape we can use before risking a broken bottom glass, but I don't recall ever seeing a number for what that limit is. One of the mechanical engineers or students here should be able to calculate what the maximum load a plate of glass can hold.