System for insulated glass with point-fixings on the inner sheet only

LITE-WALL ISO is a point-fixed performance unit of glass, structural bond and fitting. The number of fittings depends on the project-specific sizes and load conditions. The fittings are grade 1.4305 stainless steel and are factory pre-fitted and sealed.

Safety concept

LITE-WALL ISO fulfills the requirements of ETAG 002 - „Guidelines of the European technical Approval for structural sealant glazing “ - and can be classified as Type III according to Point 2.1. of this guideline – with restraints to minimize danger should the bond fail.

The integrated LITE-WALL restraints provide mechanical restraint in the case of structural sealant failure up to the point of static overload. The laminated safety glass inner sheet remains anchored to the sub-frame by the fittings.

Wind loads as well as self-weight of the outer sheet are carried by the silicone structural bonding to the inner sheet.

The positive experience from more than 10 years in service supports the high product safety aspects.


1. Dimensions

max. production size 2500 x 5000 mm
min. production size 250 x 450 mm
max. aspect ratio 1:20

In any case it is necessary to carry out a project-specific structural analysis.


2. Thermal Insulation

The construction principle – fixing the fitting only to the inner sheet – results in a technically optimum thermal performance even where the fittings are located. At normal temperatures there is typically no condensation build-up on the roomside of the fittings.

Warm edge solution using CHROMATECH PLUS ψ 0,115 W/m.K spacer bars as standard.

A „Warm-Edge“ system reduces the warm bridges at the edges which improves the facade U-Value UW and also reduces condensation at the edge of the insulated unit.

Visually attractive surface appearance of a typical Warm Edge Design from CHROMATECH PLUS
Isotherm comparison LITE-WALL ISO

3. Fixing principle and connection fittings

Fixed and moving support system

The recently developed ECKELT Spider fittings fulfill the technical requirements of fixed and moving supports. The patented inserts allow better accommodation of tolerances and when used correctly ensure the functions of fixed support, horizontal sliding support and moving support.

Arrangement of fixed and moving supports

Connection fittings

Structural analyses of the connection fittings are not the responsibility of ECKELT GLAS.

Material data sheets are available upon request.

Exact technical information for applications is only available in pdf files. DWG- and DXF-files are only shown as drawings.

Tools for LITE-WALL

4. Application technical notes

With respect to the use of LITE-WALL ISO as a building product, the Austrian Institute for Building technology (OIB) has recognized it in the material list ÖE under point 3. Building products of Glass in ETAG 002 for bonded glass constructions.

Structural pre-dimensioning


Based on completed component testing we have established and verified calculation programs together with CDI Saint-Gobain. This basis has been integrated into the SJ MEPLA Version 2.5.0 [Website] calculation program and can be used for initial structural analysis.

Maximum deflection:
always measured against the main support
direction facade l/100, roof l/200

Seal depth

The dimensioning of the seal depth for dynamic loading is carried out in accordance with ETAG 002 point A.2.3.1. The static long-term load is carried out in accordance with point A.2.4.1.

[PDF] General Glazing Guidelines


5. Recommended fixing locations (view from inside)


6. SUB-FRAME requirements

1. The sub-frame must be capable of supporting the self-weight of the glass elements, wind loads and the resulting loads.

2. The deflection of the sub-frame when the above mentioned loads are applied must not exceed 1/300 of the facade height.

3. Stabilisation of the sub-frame by means of the glass is not allowed.

4. The connection of the glass units to the sub-frame is to follow the fixed- / moving connection principle.

Joint seals

For the inner seal there are pre-formed silicone profiles available. The outer seal (weather-seal) must be carried out using suitable sealing material which is compatible with the secondary seal – DC–3362 HVGER – of the insulating unit. DOW Corning DC 791 is a compatible silicone sealant. The stainless-steel restraining clips in the edge of the glass must be cleaned prior to sealing the joint. The instructions of the sealant manufacturer are to be strictly followed.


Installation is only to be carried out by professional glaziers who have been trained by ECKELT for this kind of work.

Important installation notes can be downloaded here on the right of the page.

[PDF] General cleaning instructions