18732807193 Tree pool cover glass steel grille is used to keep the loose soil and tree roots to absorb water and other nutrients, soil erosion protection of trees. Tree pool cover glass steel grille is mainly used for street trees, green belts, parks and other public green places. Tree pool cover glass steel grille is made of resin material, light and easy to install. And sidewalk parallel to the ground to prevent pedestrian injuries. Tree Grates size is generally 38 * 38 * 25, for pedestrians. Tree pool cover glass steel grille design: 1. Measure the length of the Pits good size and diameter 2. Grate Tree tree needs two boards stitching. As a whole Pits size of 1 * 1, need to cut two boards stitching together 0.5 * 1 3. If the diameter of the tree of 20cm, required on the board 0.5 * 1, an intermediate position along the edge of the cut off 1m 20cm * 30cm the gap, after stitching together, we can ensure the tree grate in the middle of a block size of 30 * 30cm ^ 2