The holding weight capacity of a nail on drywall can vary depending on several factors, including the size and type of nail, the condition of the drywall, and the weight distribution. However, it's important to note that nails alone are not typically recommended for hanging heavy items on drywall.
In general, nails are more suitable for lighter objects such as picture frames, small mirrors, or lightweight decorations. For such items, a common rule of thumb is to use a nail that is at least 1 1/2 inches long. This provides enough length to securely hold the object to the drywall.
If you need to hang heavier items or want to ensure a more secure installation, it is advisable to use additional hardware specifically designed for drywall, such as wall anchors, toggle bolts, or picture hangers. These types of hardware distribute the weight across a larger area of the drywall, reducing the risk of damage.
For any significant weight-bearing applications or installations, it is recommended to consult a professional or use appropriate mounting solutions recommended by the manufacturer or a structural engineer. They can assess the specific requirements and provide guidance on the appropriate hardware to use to ensure safety and stability.