• How to Install Joist Hangers

    | by Holly Wood

    “How to Install Joist Hangers” is a question many DIY enthusiasts and budding builders ask when venturing into deck or home construction projects.

    These small yet essential components play a pivotal role in ensuring the stability and longevity of structures, especially in decking and flooring projects.

    In this guide, we’ll delve into the step-by-step process, shedding light on the intricacies and best practices for installing joist hangers efficiently and safely.

    The Importance of Joist Hangers

    Joist hangers are specifically designed to support the weight and load requirements of joists, making sure the structure, be it a deck, floor, or roof, remains intact.

    Whether you’re working on deck framing or a floor, using specific joist hangers made of steel ensures the joists maintain their position, reducing the risk of structural shifts or collapses.

    Here at Materials Market we stock both:

    Prepping for the Installation

    As with every construction project, preparation is pivotal. Remember, if you don’t prepare adequately, chances are things won’t go as smoothly as you hope.

    1. Safety First: Before diving into installing joist hangers, ensure you’re dressed in the appropriate safety attire. This might include gloves, safety glasses, and a hard hat.
    2. Clean Workspace: Make sure the area you’re about to work on is clean and organised. This will not only make the process smoother but also reduce potential hazards.
    3. Measure and Mark: Using a tape measure, decide where your joist hangers need to be. Marking this will aid in the positioning later on.

    Installation Steps for Joist Hangers

    1. Position the Joist: Start by aligning your floor joist with the rim joist, a horizontal board that runs along the outer edge of the floor structure. Next, secure them in place by toenailing the joists into the wall ledger. Toenailing involves driving nails at an angle, reinforcing the connection. Ensure the top of the joist is flush with the top of any flashing on the wall ledger. This ensures a level installation. Pro tip: Start the nail first before setting the joist to make hammering easier.
    2. Position the Joist Hanger: Squeeze the timber hanger, or beam hanger, securely around the joist. The joist should sit perfectly inside the hanger, with no gaps underneath or on the sides. If you notice gaps, double-check your joist and hanger size.
    3. Nailing the Hanger: Secure the hangers to the wall ledger using galvanised nails. To make sure the hanger supports its intended load, fill all the predrilled holes in the joist flanges. It’s essential to nail into all the holes to get maximum support.
    4. Do Not Modify: Never try to cut or modify joist hangers to fit. If they don’t fit, it means you have the wrong size. Always purchase the right size for your joists to ensure safety and efficiency.

    Additional Tips

    • Always refer to local building codes before starting the installation.
    • Use only galvanised nails or screws recommended for joist hanger installation. Avoid using drywall screws or common nails as they might not provide the needed strength.
    • While hammering, ensure the nails penetrate through the joist and into the ledger board or supporting member.
    • Always double-check your work. Making sure everything is secure and in place ensures the safety and longevity of your deck or floor.


    Understanding how to install joist hangers is crucial for anyone involved in building decks or floors. By following the outlined steps and recommendations, you can ensure a solid, secure installation, keeping your structure sturdy for many years.

    Remember, always consult a professional to ensure the best results.

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