DoubleDisc MB50

Glass Balustrade System

 The DoubleDisc MB50 is a side fixed frameless glass balustrade system 



The DoubleDisc MB50 series are a range of disc fittings for point fixing cantilevered glass balustrades. They provide a range of options from classic squared edge disc through to the latest adjustable spacer option.



The DoubleDisc MB50 series are 50mm diameter. The inner spacer is normally 30mm thick and the outer disc 6 to 10mm thick. The fittings use M10 fixings.

MB50/S – Square edge disc

MB50/R – Round edge disc

MB50/RA – Radius shape disc

MB50/T –Tapered disc (special on request)

MB50/SD – Stepped disc - button head

MB50/SQ – Square cover on disc

MB50/A – Adjustable Spacer – 40 to 50mm

Material & Finish

The DoubleDisc MB50 series is made from 316 grade stainless steel and is available in machined, satin or polished finish.


Typical Setout

600mm centres for 12mm in Occupancy A barriers up to 1100mm height

400mm centres for 12mm in Occupancy A, B, E, C3 barriers up to 1150mm height    

400mm centres for 15mm in Occupancy A, B, E, C3 barriers up to 1250mm height


Refer to MB50 design tables and PS1 for more detailed information 



The system is glazed with Metro Performance Glass, as follows

10, 12 & 15mm TempaFloat Toughened Safety Glass

10, 12 & 15mm TempaSoak Heat Soaked Toughened Safety Glass

10, 12 & 15mm TempaPrint or TemapScreen Ceramic Frit Toughened Safety Glass

13.5 & 17.5mm SafeLite Toughened Laminated Safety Glass 



The System has been tested in NZ to AS/NZS 1170 barrier loadings in accordance with B1/VM1 Amendment 8


The system can be used for compliance with NZ Building Code Clause F4 – safety from falling.

The System can be used for residential and commercial Occupancy A, B, E and C3 balustrades, with the fitting set out as per the Producer Statement (PS1), design tables and fixing details.


For compliance with the DBH Guidance on Barriers, heat soaked toughened glass is recommended and for barriers over 5m from the floor, an interlinking handrail or toughened laminated safety glass, are recommended. (Refer clause