What's the right way to nail off a face-mount joist hanger like a Simpson LUS210?

Use the full nail pattern printed on the hanger — skipping nails voids the listing and cuts capacity. For a Simpson LUS210, that's typically six 16d (3-1/2") common nails driven into the joist face and ten 10d (1-1/2") nails into the header.

Code reference:

• IBC 2018, Section 1619.2 requires metal connectors to be installed per the manufacturer's published instructions.
• ASTM A653 governs steel connector performance — skipping fasteners reduces tested load capacity.

Proper technique:

1. Pre-bend nails slightly to avoid splitting.
2. Drive flush — no overdriving (crushes steel, reduces withdrawal strength).
3. Use hot-dip galvanized or ZMAX nails if the hanger is rated for it (check the box).
4. If the joist is dry, pre-drill pilot holes near ends to prevent splitting.

What happens if you skip nails:

• Load path is compromised — especially under uplift or lateral loads.
• LUS210 is rated for ~1,500 lbs uplift when fully nailed; partial nailing can drop that by 40–60%.

Bottom line: Make your guy follow the stamped pattern on every hanger. It’s not optional — it’s the difference between a safe floor and a failure point. If he won’t comply, pull his work and make him redo it.

Fill every hole. Period. Simpson Strong-Tie (and all major hanger manufacturers) rate their hangers based on all nail holes being filled with the specified fastener. Skipping holes reduces the published load capacity — often drastically.

For a LUS210 (2×10 face-mount):

• Header (carrying member): 10d common (0.148″ × 3″) or 10d × 1½″ (0.148″ × 1½″) — all 6 face holes + 2 top flange holes = 8 nails
• Joist (carried member): 10d × 1½″ — all 4 holes = 4 nails

Total: 12 nails per hanger. No exceptions.

Code & Testing Basis:

• IRC R502.6 / IBC 2304.10.3: Connections must be per manufacturer’s instructions.
• ESR-2552 (Simpson ICC-ES report): Load tables assume full nailing. Partial nailing = unlisted installation = failed inspection.

Common Mistakes to Avoid:

• Using 8d, 16d sinkers, or gun nails (0.131″) — not allowed unless hanger is specifically rated for them (LUS is not).
• Missing top flange nails — they resist uplift and rotation.
• Toe-nailing instead of face-nailing the joist — not a substitute.

If access is tight: Use a palm nailer or positive-placement nail gun (e.g., Simpson PPN). No excuse for skipped holes.

Bottom line: Your guy is installing hangers that don’t meet code or design loads. Fix it now — before the inspector or the floor fails.