Look, for years, OK years I kid you not I told people removing the back from a Billy bookcase was basically vandalism. Structural vandalism. To the point where I said it quite confidently to my flatmate when she took the back off hers to fit it over a radiator (*she does do upcasts sometimes), I said it’s going to lean, it’s going to wobble, you’ve basically turned a bookcase into the world’s tallest, saddest shelf skeleton. She still did it. It’s been fine for two years. I mention this not because I owe her money or an apology, she’d never let me live it down, but because I was so damn sure about something I knew literally nothing about.
The issue I had, and I think it’s the issue most people Googling “can you use billy bookcase without back” are subconsciously hoping will be confirmed is that it feels like it should be structural support.
The back panel, massive sheet it is, feels structural.
It’s that thing you have to nail little batons into at the end of assembly once your driving screws elbows are fully shredded, and because it’s the final step you’re left with after hours of IKEA torture your brain automatically categorises it as important stuff, holding everything up kind of stuff. It feels like the bit that keeps the whole thing from collapsing in on itself like some cheap deckchair. So obviously taking it off is like removing a support beam. That was my argument. Looked structural? Must be structural. Faily never tested that theory, I just blasted it back louder than anyone else with the enthusiasm of someone who’s seen three TikTok flatpack fails.
The real job that back panel has
The thing I got spectacularly wrong then, was that the hardboard back on a Billy is not actually supporting the shelves at all. The shelves rest on their pins/or their fixed housing, exactly as they would with or without that flat piece of hardboard lurking behind them. The back panel is actually there to prevent the entire bookcase from racking. Racking is the technical term for when a tall rectangular structure bends sidewards into a parallelogram shape when force is applied laterally. You’re literally pushing the whole frame sideways instead of top to bottom. That is a thing that unbacked bookcases can do. It’s also a very real reason for the back being there.
It’s not however, the only means of preventing that from happening and that’s the thing I failed to consider because squat removing the back turns your Billy into a shitty diagram IEngineering project where you have to figure out how to stop it racking… some other way.
Removing the back obviously takes away the built in diagonal bracing stopping that sideways movement, so you’ve got to replace it. That’s literally it. That’s the problem. And it’s easily solved in about four ways depending on your reasoning for removing the back panel in the first place. Say you take it off to put the bookcase over a radiator or along a skirting board, which is honestly reason number 99% of people take them off, you screw it to the wall with some L brackets and hey presto the wall is now taking all the structural loading from the back panel doing a better job than the back panel ever did, because the wall is basically not going to move under normal circumstances.
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If however you’ve removed it because of all the silent influencers and plant tacos with books on floating shelves half drilled into their backs doing the rounds on every social media platform where you’re trying to create that open, curated, plants and books on display two sides kinda look, you’ll probably be butting it up against a wall most of the time anyway. Which means the wall is already doing that job with or without you screwing into it.
What I somehow failed to appreciate until I went and looked because I had no idea what I was talking about is that IKEA is actually this awesome about their wall fixing instructions. They come separate from whether you’re using the back panel or not because hiding the fixings behind the back wasn’t the only option, it was meant to be doing structural support from day one.
The back was there doing it’s job and the wall fixings were doing an identical job from a different angle and I never clocked one because I hadn’t taken a second to Google a middle school science lesson.
Living with the knowledge it can actually survive
Look theory’s all well and good but I’m living in a rented flat with dodgy junk Ikea wardrobes so let’s talk about actually living with a backless bookcase.
Mine went over a fairly shallow radiator alcove so out came the back, two brackets on the top corners fixing into the wall and before I’d even put a single book on it I’d sent the flat group chat a picture asking if anyone minded, and that’s just what I do now. One reply “looks so much better, why did you ever have a back on?” Literally no notes. She was right, I didn’t know what I was talking about.
Fast forward three months and it’s survived being loaded up with an obscene amount of books, the small plant that’s still living despite my evident green thumb and one very eager cat who thinks the centre shelf is personally there to provide her with a stable viewing platform out into the rest of the flat. Not a lean in sight, not a hint of wiggle, not once have I looked at it and regretted the afternoon I spent arguing with my flatmate about it. Taking the back panel off would not have changed any of those things because none of those things were ever going to apply any force sideways. It was just the weight of stuff sitting on shelves, which the billy frame can totally handle by itself.
The part that mattered to me as a renter, and the reason I’d actually advise a friend to go for it rather than weighing up all the ‘but what ifs’ is that two tiny bracket holes behind a bookcase pushed up against a wall are about as stealth rental damage as it’s possible to get. No one is doing a deposit assessment moving every bookcase six inches to one side to see what’s screwed into the plaster behind it. Taking the back off your Billy is not the interior barbarians at the gate I made it out to be for years, it’s just something with a ridiculously simple fix I somehow managed to.not google before I opened my mouth.
