- 48.3 diameter x 3.2 thick high grade steel standards with a rosette at 500 centres

- Up to 8 connections made at one level

- Narrow openings in rosette position the ledgers at right angles

- Wide openings in rosette allows alignment of ledgers and diagonal braces at the required angle

- Connected by sliding wedge head forming part of the ledger over the rosette and inserting wedge into opening