Page "Spreadeagle (position)" Paragraph 10

A spread eagle may be upright, in which case the tied partner's wrists and ankles are tied to anchoring points on a wall or restraining frame, such as a door frame, a Saint Andrew's Cross or a pair of spreader bars.

The tied partner can be face-forward or face-back.

More restrictive use of the frame may involve additional straps around the arms, legs, and torso.

In some cases, up to five straps can be used on each arm, around both the forearm and biceps.

Similarly with the legs, several straps may be secured around the thighs and in some cases even the feet.

Additional straps above and below the breasts and around the waist prevent the back or torso from shifting.