Product details:

The TuffBlock Instant Foundation System is a lightweight deck foundation alternative to concrete. It consists of multiple floating deck blocks that sit on top of the ground and accept pieces of wood to construct decks, garden sheds, landings, pathways, raised walkways, cubby houses, dog shelters and more. Each TuffBlock can support up to 1,700 pounds and weighs only 1.5 pounds. They are designed to accept 2x4, 2x6, 2x8 Joists and 4x4 Posts. The TuffBlock system is unique because it allows you to build a deck that is as low as 6.5 inches off the ground, with no digging. The TuffBlocks are made from recycled polyolefin material with an ultra-high UV rating. They are designed with a ventilated underside. The TuffBlock system is the only block product that can be secured to the post or bearer to provide extra stability.

• Instant foundation system for floating decks and platforms as low as 6.5" off the ground
• Each block designed to support over 1700 lbs
• Replaces the need for heavy concrete blocks - weights 1.5 lbs - 28 times lighter than concrete
• Measures 11-9/16" wide, 11-9/16"deep and 3-9/16" high
• Adapts to accept all 2-inch nominal joists and 4x4 posts