Final answer:
The most common mistakes when installing joist hangers include using the wrong size or type of hanger, not aligning the hanger properly with the joist or beam, and improper fastening.
Step-by-step explanation:
One of the most common mistakes made when installing joist hangers is not using the correct size or type of hanger for the specific application. Joist hangers come in different sizes and styles to accommodate different loads and types of connections. It is important to select the right hanger for the job to ensure proper support and load distribution.
Another common mistake is not properly aligning the hanger with the joist or beam. The hanger should be installed flush against the wood member and fully supporting it. Misaligned hangers can lead to inadequate support and compromised structural integrity.
Lastly, improper fastening is a common mistake. Joist hangers should be securely fastened to the wood members using the appropriate nails or screws specified by the hanger manufacturer. Failure to use the correct fasteners or not using enough of them can result in hangers that are not properly secured, which can lead to failure under load.