Metal Fasteners and Hardware

To build a good deck, the need for good fasteners is imperative. Stainless steel fasteners have shown the best longevity, followed by hot-dipped galvanized fasteners.

Metal fasteners (nails, screws and bolts) and hardware (joist hangers and post anchors, etc.) can corrode, which can detract from the appearance of your deck and ultimately affect its safety and performance. As a result, best practice is to bear joints and beams directly on posts whenever possible.

Hot-dipped galvanized nails should also be used instead of standard carbon-steel nails and electroplated galvanized nails. Ring- or spiral-shank screws should be used instead of nails when securing decking to joists. For more details, please refer to the chart to the right.

Decking Fastener Guide

Minimum requirements for fasteners*
Nails Screws Hidden Fasteners
Common hot-dip galvanized nails are an economical fastener choice for attaching deck components together. Ring-shank or spiral-shank nails offer improved holding power. Galvanized screws are commonly used to secure the treated Cypress decking to joists. Use 2-1/2” screws to securely fasten decking. Metal clips, wafers, and metal strips are three types of hidden fasteners attached to joists and concealed from overhead view. Check with manufacturers of hidden fasteners to determine the proper fastening schedules.
*Hot-dip galvanized fasteners are recommended for above-grade applications and should meet ASTM A153. Connectors should meet ASTM A653, Class G185 with 1.85 ounces of zinc coating per square foot minimum. For coatings other than galvanized (e.g. powder or ceramic) check with the manufacturer to ensure the fastener is recommended for use with pressure-treated lumber.Type 304 or 316 stainless steel fasteners and connectors, commonly used in severe exterior exposures, provide maximum corrosion resistance.

Fastener Schedule

Functional Performance
Decking 5/4 x 6 2x4 2x6 5/4 x 6 2x4 2x6
Nails (2) 8d (2) 10d (2) 10d (3) 8d (2) 10d (3) 10d
Durability (2) 2-1/2” (2) 2-1/2” (2) 2-1/2” (3) 2-1/2” (2) 2-1/2” (3) 2-1/2”

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