PosiGlaze Channel System

(Base and Side Fix) 


The PosiGlaze System was developed for cantilevered structural balustrades to cope with the transition from monolithic Toughened Safety Glass (TSG) to Toughened Laminated Safety Glass (TLSG). The unique design uses a special high strength hollow-core aluminium extrusion and special glass clamp kits that secure and locate the glass into the aluminium section. This means the system can be used on 12 & 15mm TEMPAFLOAT® TSG; 15.2, 17.2, & 19.2 TLSG with SAFELITE® EVA Interlayer; and 13.52, 17.52 & 21.52 TLSG with SAFELITE® STF (Sentry®) Interlayer; without holes in the glass.

  • Fully adjustable after installation: PosiGlaze uses a unique, simple adjustment system allowing horizontal alignment of each glass panel.
  • Lightweight and extremely strong: Cleverly designed out of extruded aluminium, saving weight yet keeping strength.
  • Engineered: Our system has been engineered & tested to comply with the building regulations (with the appropriate fixing spacing and glass thickness) in both domestic and selected commercial installations. It can be installed in a wide variety of applications. 

Glass Thickness

(Nominal mm)

Inner Layer of Glass

(Nominal mm)

Interlayer Thickness

(Nominal mm) and Type

Outer Layer Glass Thickness

(Nominal mm)

13.52 6 1.52 Sentry® 6
17.52 8 1.52 Sentry® 8
21.52 10 1.52 Sentry® 10

An interlinking rail is not required when specifying SAFELITE® STF (Sentry®) interlayer. (minimum panel widths apply).

*Note: Inner layer refers to the balcony side.

Key Features

  • The PosiGlaze System can be base fixed (top) or side fixed (face) mounted.
  • PosiGlaze's clever locating and adjusting technique allows installers to adjust the glass panels once in place, with a turn of a spanner, saving on installation time.
  • Simple to install align and adjust.
  • Hydraulic Pool Gate & Panel Clip Hardware, is available to suit pool balustrade applications. (Refer to Frameless Pool Fences for specific design notes).

Material Finish

  • The sections and covers are fully anodised to 25 microns for durability and come standard in a unique brushed anodised finish which give a 'Stainless Steel Effect'.
    Powdercoated upon request. Note: Powder coating is available in a wide range of colours with commercially available surface integrity warranties from 10 to 30 years.
  • Important instructions - Attachment to structures;
    - An EPDM or similar material spacer must be used to separate all aluminium items from all timber, concrete and steel structures. Failure to do so can lead to the chemicals in the structure affecting the surface finish on the aluminium.
  • All fixings must be Stainless Steel.

Occupancy Type

  • Suitable for occupancy types A, B, E, C3, C1/C2, D (subject to glass & fixing type)
  • Occupancy types as per AS/NZ 1170.1.2002.


  • Exceeds the wind loading for all Wind Zones up to and including Extra High Wind Zone as set out in NZS 3604:2011
  • Max design Wind pressure subject to glass type and fixing method.

The system is glazed with Metro Performance Glass, as follows:

  • TEMPAFLOAT® 12mm & 15mm nominal thickness, monolithic toughened safety glass (TSG) with interlinking rail.
  • SAFELITE® EVA 13.2mm, 15.2mm & 19.2mm nominal thickness, toughened laminated safety glass (TLSG) with stiffener brackets or interlinking rail.
  • SAFELITE® STF (Sentry®) 13.52mm, 17.52mm & 21.52mm nominal thickness toughened laminated safety glass (TLSG) with rigid interlayer. Stiffener brackets or interlinking rail not required (provided minimum panel length requirements are satisfied).

Interlinking Rail

  • All monolithic toughened frameless glass balustrades must have an Interlinking Rail to conform to NZS 4223.3.2016, including the latest amendment of NZBC B1.


  • Complies with AS/NZS 1170:2002, NZS 4223.3.2016,
    NZ Building Code B1, F2, F4 and F9.

Scope of Use

  • PosiGlaze is the perfect choice for residential to light commercial installations where a frameless glass balustrade is desired.
  • Our high specification glass clamping mechanism locks glass panels into position effortlessly with four immobilising fasteners, per meter of channel. Should the need arise, it remains possible to re-align or even remove individual panels after the initial installation has been completed.
  • With the use of a trapezoidal adjustment mechanism, it is possible to horizontally align each individual panel of glass to create an immaculate and seamless finish
  • Where required, an interlinking top rail finishes off the system, producing a low profile modern look.


Balustrade Stiffener Brackets – for aligning and stiffening panels

Support Inquiries

  • Metro Technical email technical@metroglass.co.nz