Hi - Am wanting to have a glass ballustrade on our deck - it will sit higher than 4m from the ground (raised floor residential building). Im aware of the broad regulations BUT really need some basic clarity ont he following:

• Do I need a specific glass? Im assuming 12 mm but dont have the specific req's.
• Whats the max length of the glass panels I can have?
• Does the balustrade need a top rail or can it be placed on spigots alone without a top rail?
• Is there a BEST SUPPLIER out there that could be recommended? (Im in NSW).

ANY additional advice would be welcomed. THANKS