The Bunk bed refers to the upper and lower double deck bed, also known as the upper and lower beds, which can occupy less land, and its upper and lower structure saves space at the same time; Composed of a bed frame, bed board, guardrail, and ladder, personnel reach the upper bed through the ladder, using steel pipe material with a wall thickness of 0.8-1.5mm and a commonly used size of 2000 × one thousand and eight hundred × 900mm, also widened to 1 meter, 1.2 meters, and 1.5 meters, suitable for schools, factories, construction sites, and homes.

There are two types of assembly of Bunk bed: assembly type and plug-in type. Each joint of the bed can be tightly tightened, and bolts or other guardrails can cling to the bed; When selecting a Bunk bed, there should be guardrails on both sides to protect the safety of personnel.

The loft bed is an elevated bed similar to the Bunk bed, but it does not have a lower bed to make room for other furniture, such as a table, which may be built into the loft bed. The low attic bed is designed for young children with a lower height from the ground.

The common type is the standard Bunk bed, in which two mattresses of the same size are directly stacked on the other. Except that the bottom mattress is full size and the upper layer is double Bed size size, a double bed is standard. A complete Bunk bed is also called a widened bed, which means that the top and bottom are the same size. They all have a double bed, which can accommodate a total of four people. The bunks are also arranged like standard bunks, except that the lower bunk is a sofa that can turn into a bed instead of a standard mattress. Beds can be used to save space in small apartments or rooms, as lower beds can be converted into sofas for daytime use. In an L-shaped Bunk bed, the bottom bed is at right angles to the top bed, so that when viewed from above, the bed forms an L. This also forms a small niche where tables or bookshelves can be placed.

The loft bed refers to the Bunk bed with only the upper bunk, which creates an open space below that can be occupied by the chest, drawer or even the work area. This allows the attic bed to effectively utilize small spaces and utilize the entire vertical area, otherwise it will be idle. Some loft beds even have retractable/roller beds, while retaining the ability to include workstations and drawers. Penthouse beds may be more expensive than Bunk bed due to built-in storage capacity and other features.