The second major form is the scissor chair. This type is based around a series of X shapes assembled in parallel to provide both the legs and the seat. They include the simple folding stool and the variations on that theme meant to improve its comfort. All chairs in this type are composed of two sets of interlocking legs with a folding rigid seat and zero or more additional pieces as outlined below.
The subtypes of this chair:
- Type 2A - Folding Stools - These are often referred to as folding stools. Their legs are sets of straight boards connected at the top and bottom with horizontal rails. They usually do not have a back. They are sat across the X.
- Type 2B - Backed Stools - These are basically Type 2A seats with some minor attachment added for back support.
- Type 2C - Folding Chairs – These chairs are like the folding stool except one set of legs extends well above the seat to for a back. Consequently, the chair is sat across the "side" compared to the other types. The boards that comprise the leg that includes the back have either an S shape or are straight while the shorter "leg" sideboards are straight.
- Type 2D - Savonarola Chairs - These chairs are similar to the folding chairs except both sets of legs are made of S-shaped members that extend above the seat. Instead of serving as a back, these become armrests. These chairs are sat across the Xs like the X chairs and the folding stools. Most examples include a board spanning the ends of the arms to serve as a backrest.
- Type 2E - Backless Savonarola Chairs - As you'd expect, these are exactly the same as the Type 2D just without the backboard. I've only run across just a couple of illustrations of this variation.