How Many types of ringlock scaffold ledgers-Horizontal Member of Ring Lock System Pin Lock Scaffold Construction

How many types of ringlock scaffolding ledger horizontals  

Ringlock scaffolding ledgers are the horizontal member of the ring system scaffolding. 
There are a lot types of ringlock scaffolding ledgers according to the ledger axis sizes, ledger ends types. 
Definitely, ledger axis sizes are customized from 2'-10' to ringlock scaffolding standard centers. 
Ledger ends types include European Layher Type,  Latin American Type, USA&Canada Type, South East Asia Type, New Zealand Types. 
Wedges pins of the ledger ends are customized too according to each countries customs to match up with the holes on rosette rings on ringlock standards.
There are U Ledgers and O ledgers for Europe, New Zealand and Latin American Ringlock Scaffolding Systems.
The Ledger heads of the U ledgers are different with O ledger ends. Which is a special designed according toe U profile shape of each countries.   
Normal duty ringock ledgers and shoring heavy duty ringlock ledgers are considered in design according the load capacity. 

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