<p>Especially in the application of stone design also rely mainly on empirical methods. Which gave the optimization of the use of stone has brought some inconvenience. Under normal circumstances, the choice of stone  separate benches made with composite material  should pay attention to the following aspects: the use of stone stone applications are divided into external and internal use. For the external decorative stone, because of its relatively poor environment, the impact of weather, the impact of harmful substances, the impact of wind load, etc., so the general selection of high strength granite products; and as an interior decoration materials, we The main pursuit of beauty and creativity, the pursuit of gorgeous, simple effect, it is generally used marble or slate products.</p><p> Of course, for the indoor lobby, stairs and other parts, can also choose a small color, good color granite. Quality of the product Stone quality refers mainly to the physical properties and mechanical above ground floating pool decks  properties of stone, including water absorption, bulk density, dry compressive strength, bending strength. Under normal circumstances, the volume of stone density is small, relatively high water absorption.</p><p> This kind of stone, from the appearance of the material is relatively loose, its essence is the defects of the material porosity is large, easy to use inhalation of various impurities and dirt, resulting in premature failure of stone; stone compressive strength and bending strength , Not only can not meet the design and use requirements, but also a serious engineering risks. Therefore, the selection of a stone, the best qualified quality inspection departments to do physical testing, which is particularly important to plastic decking boards prices suffolk the external wall hanging stone.</p>