Joist Hanger and Connector-Nail Count
Joist hangers and the connector nails that fill them: joists = floor(width x 12 / spacing) + 1; hangers = joists x hung ends; nails = hangers x nails per hanger. A 16 ft-wide floor at 16 in on center is 13 joists, hung both ends, so 26 hangers and about 260 connector nails; if one end bears on a beam (ends = 1) it is 13 hangers and 130 nails. Every hanger hole is filled with the specified structural connector nails (not roofing nails); the manufacturer sets the model. Distinct from deck-ledger-fasteners.
Formula and source
joists = floor(run_width_ft x 12 / spacing_in) + 1; hangers = joists x ends_per_joist; hanger_nails = hangers x nails_per_hanger.
Joist-hanger count identity by name (joists across the run, hangers on the hung ends, filled holes); first-principles count arithmetic.
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