TuffBlock is the world’s fastest growing foundation method for a range of home improvement projects, including raised or low-profile decks, walkways, cubby houses, and much more. TuffBlock removes the need for digging holes and pouring concrete, making it the easiest and most versatile foundation system on the market.- Accepts 3.5″ x 3.5″ or 4″ x 4″ Posts- Accepts 1½” – 2″ Joists & Bearers- Each TuffBlock is load rated for 1700lbs

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