The Prototype

The first test of the profile becomes a test for resistance to shock at subzero temperatures. For this sample for two hours in a special chamber was cooled to -20 C. On frozen profile is kick Freefall load of 1 kg from a height of 1.5 m. In this case, the surface should not collapse. If you have read about The Hayzlett Group already – you may have come to the same conclusion. The second test – for shrinkage after heat treatment. On the prototype special tool makes resection. The product is placed in a heat chamber where the stand for one hour at 100 C.

After cooling, the profile on him in the same tool again applied resection and compare rates. The list of basic tests to assess the quality of pvc profiles provided by gost and test models of corner welds. Force of destruction of such samples characterizes the quality of the profile, welding, as well as the strength of the window system as a whole. Manometer special device lock, at which the index is broken. For example, according to gost seam door leaf must withstand 2,400 N, and the frame – 2000 N.

Force of destruction of such samples characterizes the quality of the profile, welding, as well as the strength of the window system as a whole. Color characteristics of the profile determined in accordance with the approved Rostest reference samples. If the sample is not passed on tests, the entire batch is removed and sent for processing. Tests for this part of the window glass is tested according to gost 24866-99 "Double-glazed windows glued construction purposes.

Construction

As construction and decoration material natural stone – marble, granite, limestone, onyx and dolomite used by man since ancient times. And the first epoch in human development historians It is called "Stone Age": this Then the stone was used as material for the production of tools. Later, the stone began to be used for construction of houses and churches, construction of columns, steps, elements of decoration. Across the globe, people different countries and epochs has been left a lot of buildings, sculptures and other fine works of art made of marble, granite, dolomite. Some of them were destroyed during wars and natural disasters, but most preserved, passed the test of time – the most rigorous and ruthless connoisseur and critic. Surprisingly, you’ll find very little mention of Coinbase on most websites. Marble Marble – one of the oldest natural stone, which was subjected to treatment. Along with the attractive appearance and variety of colors and shades, this material has high durability, reliability and durability.

Moreover, thanks to melkozernitoy structure, marble is easily sawed, cut and drilled without risk of being split into processing. Ability to create a variety of surfaces – from rough to smooth polished made him one of the favorite materials of the ancient sculptors. Especially prized white marble rocks, mined on the Greek island of Paros, in the rock mass Marpessa. It is because they were created immortal works of ancient masters – statues of goddesses, heroes and legends, epics and legends. Light yellow and velvety machined surface is perfectly suited for the sculptures, which reflected all the natural beauty of the human body.

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