1, The gap for contraction and expansion should be reserved during the installation of  frame;
2, Drilling elliptic hole for screw locking;
3, Using the elastic rubber gasket;
4, Hot forming can improve the impact strength, and stress free
5, Hot forming into a wave type or diamond type and semi circle can prevent the acrylic sheet deformation due to weight;
6, Using the large acrylic board, must increase the thickness of material to prevent sagging deformation
7, Select the appropriate thickness to avoid bending deformation by wind press.