I have been designing a set of very large “conference” tables for an art museum and we are stuck on one small detail. The table top is 1/4″ tempered glass which will rest on oak legs and birch plywood cross-members. The glass will be bordered all the way around by oak trim, which will simultaneously support the glass and protect its edges from catastrophe. See the attached images for more details.
Ideally, we would like to rest the glass directly on top of the oak and birch, but our back up plan is to use silicone bumpers.
The first concern we have with resting glass directly on wood is that the glass could possibly crack. But, obviously we would take the greatest care to make sure that any wood surface touching the glass would be smooth prior to setting the glass top.
The second concern we have with resting glass directly on wood is that moisture could potentially build up between the two. On the other hand, all of the wood will be finished with multiple coats of lacquer, there is plenty of space between the wood members to allow for airflow under the glass, and the museum will obviously be climate controlled.
Does anyone have any thoughts on why we should or should not rest the glass top directly onto wood?
Thanks in advance for the input!