| | Item: | K020 | | Compendium: | Punch corner | | |
| | | Item: | K023 | | Compendium: | Light Steel Keel | | |
| | | Item: | K024 | | Compendium: | main hanger | | |
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| | | | Item: | K026 | | Compendium: | main keel | | |
| | | | Item: | K029 | | Compendium: | 50 Sub-Joist | | |
| | | Item: | K030 | | Compendium: | combination by casette type keel and 50 sub-keel | | |
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