The bathroom cabinet I am building has 7 adjustable (with shelf pins)
5/16" glass shelves.
The sides and back are painted birch plywood and the face frame is poplar and
the dimensions are 18" x 9" (the cabinet is pretty square).
What is a good margin to leave so that I won't have issues with shelves
sticking due to expansion, paint layers (over time), measurement
I made a blank of 1/4" plywood that had 1/16" margins (17 7/8 x 8 7/8)
which certainly would give enough room but I'm wondering whether it
would be wise to tighten them up a bit to say decrease the margin to
So what is a standard margin for a good quality cabinet in such a situation.
(I know this is not a scientific question but I wanted to get input from
people who have built such cabinets before)
Also, should one use tempered glass for such a situation?
I am planning on ordering polished edges at least for the front edge. Is
it common to polish all edges or is that likely to be a waste of money
and should I just go with polishing the visible front one.
Anything else that one should consider when ordering glass for shelves
for a bathroom cabinet?
Note I am planning on using 5/16th glass to match the thickness of some
existing glass shelves in the bathroom.
If existing glass shelf tolerances have worked fine, why not continue
to use those tolerances with the new shelves.
I would assume if you pay for the edges to be polished, the fee is for
any number of edges. I think the fee is for polishing, period, not
dependent on the number of edges. Otherwise, the fee is an hourly
fee. Any additional fee can't be that much to complain about....
5-10 minutes to polish 7 small panes!
I typically make shelves 1/4" - 5/16" narrower in width than the width
between the interior end panels.
If you do have trouble, due to the shelves being a bit too wide for the
thickness of the doubled (one on each side), typical shelf pin standard,
simply turning all four shelf pins upside down will generally solve the
I could see how those could be helpful on heavy shelves.
But these are 18x9" medicine cabinet type shelves - so no heavy loads -
mostly medicine bottles, wife's makeup stuff, toilet paper, tissue
I wouldn't think more than 10lbs/shelf max.
And since the shelves are glass I prefer smaller, less obtrusive pins.
But for heavy wooden book shelves, I see why the other style would have
Yours will work just fine for that application, a point which I intended
to make, but got sidetracked on a local issue (chewing out local
officials via mail for their lack of planning to deal with extreme event
I would allow just a bit more than 1/16" on either side ... 1/8" would
be more advantageous IME with lots of shelves in beaucoup cabinets and
5/16 glass is quite strong, I don't thing tempered is required unless there
is going to be lots of impacts on it. Also consider that 1/16" is not
uncommon for the cutting tolerance of the shelves so add that in.
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