Futon Bed Frame types
The Tri-Fold
There are two major differences between the bi-fold and tri-fold frame types. The first difference is the number of times the futon mattress must fold when converting from the sitting to sleeping position. The tri-fold requires the futon mattress to be folded twice while the bi-fold requires that the mattress fold only once. The second major difference between the two frame designs is that the tri-fold utilizes the shorter "width" of the mattress for seating while the bi-fold utilizes the longer "length". This gives the inherent advantage to the bi-fold because it looks much more like a conventional sofa-bed than does the tri-fold. It also provides a larger seating area.
The Bi-Fold
The bi-fold is now the industry standard and the more popular of the two basic styles. These sofa-bed lookalikes also come in two basic categories, those with arms and legs and those that sit directly on the floor.
Frames that will sleep two can be under 5 feet wide or over 7 feet wide. Many convert into a lounge position for watching TV or reading. Frames are available in oak, mahogany, cherry, pine, maple, teak, and metal. Finishes and colors abound from contemporary to traditional, and some frames can even be upholstered in your choice of fabric.
Easily delivered into the smallest of rooms, efficiently assembled with as few as 8 screws, set up and ready to use before the company arrives. Futon Furniture is a versatile, functional, dual-purpose value. You can buy an entire matching living room set in the same finish. It's all about making the right choices for YOU, your home and your sleeping needs.
Futon frame terminology
The following definitions are the commonly accepted terminology associated with the futon furniture and sofa-bed industry.
Slats:
Slat racks are the platforms on which the futon rests for both convertible futon sofa-bed frames and stationary platform beds.
Seat:
The seat rack is the slat rack on which the user sits when a futon sofa-bed is in the sitting position.
Back:
The back rest is the slat rack which the user leans back on when a futon sofa-bed is in the sitting position.
Tri-fold:
A convertible futon sofa-bed frame that utilizes three slat racks. The futon mattress can hang over the back of the frame, be folded under itself on the seat rack, or lay flat as a chaise lounge style seat. The tri-fold allows the futon mattress to fold twice along its usually shorter width.
Bi-fold:
A convertible futon sofa-bed frame that utilizes two slat racks. The bi-fold allows the futon mattress to fold once along its length.