Article 1 - Tempered glass
Heating the glass sheet to a temperature of approx. 700 degrees Celsius, then rapidly cool it with cold air - get the glass. As a result, the microstructure of the glass is changed, with the result that the mechanical strength is 5-7 times higher than the ordinary glass. Creates a regular network in the form of crystals of silica domains interrupted by small amorphous phase. Glass after quenching can not be subjected to mechanical treatment (cutting, grinding, drilling), except for sandblasting. Any treatment should be carried out before hardening. An additional effect of tempering is to get through the glass of safety features. Tempered glass has a high hardness on the outside and that is soft in the middle. So that the stresses that occur in the glass structure over time cause the disintegration of the pane shattering into small pieces.
Article 2 - Provisions on railings
The provisions concerning the construction of railings determined by regulation Minister of Infrastructure 12 April 2002 as amended. This regulation specifies the technical conditions of buildings approved for use as contained in section VII of the conditions for the safe use. Mandatory installation of railings. According to the aforementioned Regulation, the railings should be installed near the stairs or ramps, if they exceed 50 centimeters. In addition, public buildings, railings and handrails should be installed so that they can be used on both sides of the staircase. If the stairs are wider than 4 meters in the middle should be installed as an additional railing or banister. All designed railings must meet stringent technology standards and assembly of Polish Standards. The height of handrails, balustrades clearances and openings. The regulation also specifies the allowable amount and the size of clearances for single-family homes and for public buildings such as blocks, schools and kindergartens. In the case of the construction of railings in houses its minimum height measured from the top of the handrail should be 90 centimeters. However, in public buildings, schools, health centers railing should be at least 110 cm in height, and the maximum clearance between rungs railings must be no larger than 12 centimeters. In the single-family homes legislation does not regulate the maximum width between rungs. If the railings are accessible for people with disabilities should be mounted on both sides of the stairs or ramps at an altitude of 75 and 90 centimeters.
- Glass railing with baluster
- Glass railing self-Supporting
- Wire railings
- Railings with vertical bars
- Railings with horizontal bars
- Perforated railing