I've had 5 IKEA Billy bookshelves lining a wall on my second floor for maybe 18 years. They have always been completely filled with books. Recently I decided to paint them and try to make them look like a large built-in bookcase.
When my husband attached planks of wood between the shelves (with a nail gun) in order to prepare to add vertical trim, it occurred to me that this was going to be one monolithic structure, and we never did secure it to the (plaster and lath) wall. I have no idea how this impacts center of gravity and danger of tipping. It was a little uneven so my husband put little shims on the bottom. It seems steady but Billy has a small footprint relative to its height.
Before we put trim and crown moulding on it, I just want to make sure this thing isn't going to become a hazard. My husband insists it's totally safe. We never have any kids or pets here (although his kids may have kids someday, who knows) so I don't anticipate anyone climbing the shelves. They would contain decorative items on top and lots of books on the lower shelves.
I'd be grateful if anyone could share any insights on whether you think this now-joined set of bookshelves is safe/secure or will there be a huge tipping hazard? And since my husband has now nail-gunned all the shelves together and we can't separate the parts and move the whole thing away from the wall, is it safe to say we're stuck with this thing as-is unless we're willing to demolish it into pieces?
Many thanks in advance for any thoughts you can share!