Installation Hardware Calculator

This calculator sizes anchor hardware for mounting a sculpture by first computing a design load, not just using the sculpture's raw weight: it multiplies weight by a safety factor that varies by mount type (3:1 for pedestal, 4:1 for wall, 5:1 for ceiling/suspended, since overhead failures are most dangerous) and further inflates that by a seismic multiplier if you're in a moderate or high seismic zone (up to 1.6x in zone 3-4). That design load is then divided by four — assuming four anchor points share the load evenly — to pick the smallest anchor size (from a fixed table of shear capacities for concrete, masonry, wood stud, drywall toggle, or steel, each with small/medium/large diameter options) that can carry a quarter of the load per anchor. The number of anchors needed is then set to whichever is larger: the mount type's practical minimum (2 for ceiling mounts using cables, 4 otherwise) or the count actually required by that anchor's real capacity against the full design load.

The achieved safety factor reported back reflects the actual hardware selected, not just the target, so it can come in above your requested minimum. Embed depth for concrete or masonry anchors and base-plate sizing for pedestal/outdoor mounts follow directly from the chosen anchor size and the sculpture's weight and height. All the capacity figures here are representative textbook values, not manufacturer specs for a specific product — for anything beyond a light, low-risk indoor installation, especially seismic zones, overhead mounts, or heavy public-facing work, get anchor selection reviewed by a structural engineer rather than relying on this table alone.