ᐅ Which BILLY shelves are better suited for long shelf boards?

Hello everyone,

I am planning to buy Billy shelves and want to use the longest possible shelves that still remain stable. My question is: Which BILLY shelf models are better suited for long shelves in terms of stability and load-bearing capacity?

I have seen that there are different constructions and widths, for example the standard size 80 cm (31.5 inches) and wider variants. Does anyone have experience with the long shelves in the different series and can offer tips on whether additional reinforcements or special materials are needed?

Thanks in advance for the help!

For long shelves, I recommend the BILLY bookcase with shelf reinforcement. The standard width of 80cm (31.5 inches) can usually sag without additional support. Wider shelves are often less stable.

The stability of a BILLY shelf with long shelves mainly depends on two factors: the width and the thickness of the shelving boards. The classic BILLY shelf comes with a width of 80 cm (31.5 inches). For longer shelves (longer than 80 cm), it is recommended to choose reinforced boards, for example, the version with 22 mm (0.87 inches) dense particleboard instead of 16 mm (0.63 inches).

In addition, a central support inside the shelf or a central beam underneath the board significantly increases load capacity. The wider BILLY models (up to 106 cm wide, 41.7 inches) generally require reinforcement, as the long boards will most likely sag without support.

If you plan to use the shelves only for lightweight items, the standard version may be sufficient. However, if you want to use them as bookcases, reinforcement should definitely be considered.

What exact length are you planning? It makes a difference whether the boards are 80, 100, or 120 cm (31.5, 39.4, or 47.2 inches) long. It would also be interesting to know whether the shelves will stand freely or be fixed to the wall — the latter improves stability and allows for longer shelves.

TYRELL schrieb:
The factor is the thickness of the shelving material.

Exactly, I always use 22mm (7/8 inch) thick shelves for wide units, as they are more durable. Wall mounting always makes sense.

As a factual addition: The original BILLY shelf is designed with a width of 80 cm (31½ inches), which means standard shelves are sufficiently dimensioned for this size. For longer shelves exceeding 80 cm (31½ inches), professionally reinforced shelves or the use of shelves with metal supports are recommended.

The load capacity of a single shelf is approximately 15-20 kg (33-44 lbs), depending on the design. To prevent deformation, the shelf should be fixed to the wall.

If you plan to use shelves over 1 meter (39 inches) from the series, individual modifications, such as screwing in additional cross braces underneath the shelves, are advisable.

hauklo schrieb:
For longer shelves over 80 cm (31.5 inches), professionally reinforced shelves or metal supports are recommended.

Thank you, that is very helpful. I am planning shelves about 100-105 cm (39-41 inches) long. Can metal supports be easily installed on standard shelving units? Or is a special model definitely required?

I would prefer the simplest possible solution, without a lot of DIY work. I’m also interested in the stability against the wall—how securely do you need to drill?