Hastings Checker Block®, approved for H-20 loading, gives you the strength of concrete in areas where you wish to maintain a grassy look including overflow parking, service roads, tree pits, and fire lanes. It is also ideal for stabilizing embankments along streams, rivers, and lakes. Checker Block® offers a ready solution when used as a tree grating. It provides high stability while offering maximum water percolation. Checker Block® consists of steel-reinforced, waffle-like configurations which create voids for grass or crushed stone. It features a greater ratio of grass (almost 70%) to concrete than any similar material thereby improving aesthetic and environmental qualities. Checker Block® is manufactured in Southern California and Eastern Pennsylvania in order to facilitate shipments throughout the United States. Checker Block® also enhances surface drainage eliminating costly underground systems. Grass can easily be cut by standard lawn mowers