Capacity varies by model: lower-capacity kids’ upper bunks are often around 200 lbs, many listings show roughly 400 lbs as common, and sturdier full-size upper bunks can be rated up to about 600 lbs.
Both are used: traditional or fixed ladders (sometimes with wide treads) and staircases (often with storage) for easier, safer access. Some models let you install the ladder or staircase on either side.
Common configurations include twin-over-twin, twin-over-full, and full-over-twin. Larger layouts also appear, such as triple setups combining one full with two twins. Upper bunks may be twin or full depending on the model.
Several models can detach or convert into two independent beds (for example, twin + full or two fulls); some listings specifically note a detachable or convertible feature to create separate beds.
Most listings require adult assembly and include a hardware set and instructions; models commonly ship in multiple packages (often two or three) and may include basic tools or indicate the tools needed.
Age recommendations vary by model. Many list suggested ages such as 5 years and up or 6 years and up, and some specifically state designs are for children over 6 years old.