Hypar structures are a freeform structure generally with cabled edges. Hypars have four attachment points with differing heights to give the sail a 3D form essential for maintaining prestress and longevity of the sail structure.

Configurations include free standing four column, two columns and attachments to buildings or partial struts back to buildings. Continuous strapped edges can be used to waterproof seal the fabric against a building above doors etc. Hypars are commonly used vertically for privacy screening. Arranged in succession multiple hypars can be used to create a “sawtooth” appearance. Just about any size or shape is possible.