Installing heavy urban outdoor furniture on a deck requires careful consideration of structural support and weight distribution. The foundation needed depends on your deck's construction, weight capacity, and the furniture's specific requirements.
For furniture weighing over 250 pounds, your deck must have adequate joist spacing - typically 12 inches on center rather than the standard 16 inches. Additional support posts or concrete footings may be necessary to distribute weight properly, especially for concentrated loads like large planters or solid concrete benches.
Consider installing reinforced blocking between joists directly beneath the furniture placement area. For extremely heavy pieces (500+ pounds), consult a structural engineer to assess whether your deck requires additional beams or upgraded footings. Always check local building codes and never exceed your deck's manufacturer-rated weight capacity.
Proper foundation preparation ensures safety, prevents deck damage, and maintains structural integrity while enjoying your heavy urban outdoor furniture.