Anchoring metal sculptures securely is essential for both safety and aesthetic longevity. The method you choose depends largely on the surface type and the sculpture's weight. Here are the best techniques for different scenarios:

1. Concrete Surfaces: For heavy sculptures, use wedge anchors or epoxy anchors. Drill a hole, insert the anchor, and tighten the bolt to create a strong hold. Lighter sculptures can use tapcon screws or expansion bolts.

2. Brick or Masonry: Sleeve anchors or chemical anchors work well. Ensure the brick is solid (not crumbling) before drilling. For hollow bricks, toggle bolts provide reliable support.

3. Wooden Surfaces: Lag bolts or heavy-duty screws are ideal. Pre-drill holes to prevent splitting and use washers to distribute the load evenly.

4. Drywall or Plaster: For lightweight sculptures, toggle bolts or molly bolts are effective. For heavier pieces, locate studs and use long screws directly into the wood framing.

5. Outdoor or Ground Installations: For freestanding sculptures, embed a steel rebar or anchor rod into a concrete footing. Alternatively, use ground spikes for softer soil.

Always consider weather resistance for outdoor installations—stainless steel or galvanized hardware prevents rust. For large or complex sculptures, consult a professional to ensure structural integrity. Proper anchoring not only secures your artwork but also enhances its visual impact.