Due to This Frame, The Window Design Increases The Strength and Stability Indicators. Experts Call Similar PVCS «Reinforced Galvanized Profile».
As for Metal -Plastic Windows, Their Additional Strength Is Especially Needed in Regions with Hard Climatic Conditions. For Example, On the Upper Floors of Skyscrapers, Wind Gusts Are So PowerFul that Can Simply Disrupt An Ordinary Window to Has no Gain.