> For the complete documentation index, see [llms.txt](https://gitbook.saf.guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.saf.guide/annexes/supported-shapes-of-compound-section.md). # Supported shapes of compound section | Pattern | Shape | Parameters \[mm] | | -------------------------------- | ------------------------------------------------------------------- | ---------------- | | ![](/files/XNVYqkvMtbcrrlfhKwAC) | Double I section | a | | ![](/files/unjUpSk43Anyn0A5zw49) |

Double Channel FtF

(face to face position)

| a | | ![](/files/X4531dXQOSdGyNaUpQ5j) |

Double Channel BtB

(back to back position)

| a | | ![](/files/d59WKEz4jV8TIhU5O5CJ) |

Starred Angle

(diagonal position)

| a | | ![](/files/f5sZ8tHyF8fGJXefNvCZ) |

Double Angle BtB

(back to back position)

| a | | ![](/files/SmbooBHOcoMP5IGOy4e0) |

Double Angle FtF

(face to face position)

| a | | ![](/files/koKaexHDyLS6Uv79p1bF) |

Double Angle BtB LL

(long leg - back to back position)

| a | | ![](/files/YiZXUJH9TIdjvBqXNmIl) |

Double Angle FtF LL

(long leg - face to face position)

| a | | ![](/files/2nhVvZnjjKOa81UJFAbT) |

Four Angle BtB

(back to back position)

| a; b | | ![](/files/1GaG1PDCqgSDafKjzZ25) |

Four Angle FtF

(face to face position)

| a; b | | ![](/files/Tk1upvf1nSkuv653O6Og) | Four Angle I | a; b | | ![](/files/zoDdMQedZFywd0XQqg6c) | Double pipe | a |