Glass in construction ― insulating glass
Requirements for visual quality according to ÖNORM B 3738
In the case of flat glass damage, reference is generally made to the “Guidelines for Assessing Glass in Building – Insulating Glass, Requirements for Visual Quality” but not every injured party knows what it means.
This ÖNORM contains requirements for the visual quality of insulating glass, which is formed from two or more dissimilar or two or more similar panes. Other relevant standards are ÖNORM B 2227, glazier operations – norm for work contract and ÖNORM EN 572 – glass in building.
That’s why SmartGlassRepair® gives you an overview of permissible and impermissible defects.
Assessment of visual quality
For the individual panes, the regulations ÖNORMEN EN 572-1, EN 572-2, EN 572-3, EN 572-4, EN 572-5 and EN 572-6 apply.
In addition, the following assessment principles apply to the insulating glass:
The visual quality of insulating glass for construction is assessed. The assessment is carried out in accordance with the test principles described below with the aid of the admissibilities listed in Table 1. Insulating glass in the version with coated, mass-colored glasses or composite and laminated safety glass or tempered glass (toughened safety glass, partially tempered glass) can also be assessed with reference to Table 1, taking the existing material standardsinto account.
This ÖNORM applies only to a limited extent to insulating glass in special designs, such as insulating glass with glazing bars in the space between the panes, insulating glass with elements installed in the space between the panes, insulating glass using cast glass, anti-attack glazing and fire-resistant glazing and systems with visible edge seal. These glass products are to be evaluated depending on the materials used, the production process and the corresponding manufacturer’s instructions.
Review
In general, when checking for defects, the review by the disc and not the supervision is authoritative.
The complaints must not be particularly marked.
This means that the consideration of the background, the inspection of the glazing units according to Table 1, at a distance of about 1 m to the considered surface from a viewing angle, which corresponds to the common room use to make.
It is inspected in diffused daylight (for example, overcast skies) without direct sunlight or artificial lighting.
In addition, the following assessment principles apply to the insulating glass:
The visual quality of insulating glass for construction is assessed.
The assessment is carried out in accordance with the test principles described below with the aid of the admissibilities specified in Fig. 1.
Insulating glass with coated, mass-colored glass or composite and laminated safety glass or toughened glass (toughened safety glass, partially tempered glass) can also be assessed with reference to Table 32, taking into account the existing material standards.
This ÖNORM applies only to a limited extent to insulating glass in special designs, such as insulating glass with glazing bars in the space between the panes, insulating glass with elements installed in the space between the panes, insulating glass using cast glass, anti-attack glazing and fire-resistant glazing and systems with visible edge seal.
These glass products are to be evaluated depending on the materials used, the production process and the corresponding manufacturer’s instructions.
