Mistake 2: Installing hardware incorrectly and using the wrong fasteners
Always follow manufacturer guidelines for appropriate fastener types and sizes, and use stainless-steel or galvanized fasteners if you are using pressured-treated lumber.
Incorrect fasteners in hangers are a notorious mistake. For example, deck screws are not a proper way to attach joist hangers, and using 1-1⁄4-in.-long 10d nails where 3-1⁄ 2-in. 16d nails are required is a sure sign that manufacturer instructions were not followed.
Fasteners that don’t have the correct corrosion-resistance rating will fail quickly when installed in treated lumber. Also, using only one-half of a two-part post-to-beam connector and installing under-size bolts in 6x6 post bases are common installation errorsThe solution:
For hardware to work as the manufacturer claims it will and the way the inspector expects it to, follow the manufacturer’s installation instructions. Proprietary hardware is not specified in the code; therefore, it is considered an alternative. Alternatives are approved via testing or engineering, and that information must be provided to the building official. The only way to be sure hardware will perform as expected is if it is installed as it was tested or designed. Beyond code compliance, valid product warranties depend on proper installation.