When comparing plastic (specifically ABS or similar high-density plastics) lockers to wood lockers in terms of durability, plastic lockers generally come out ahead due to several factors:  

Weather and Moisture Resistance: Plastic lockers are highly resistant to moisture, humidity, and water damage. They do not rust, rot, or warp like wooden lockers can when exposed to damp conditions over time. This makes plastic lockers ideal for areas with high humidity or potential exposure to water.  

Impact Resistance: Plastic materials, especially those used in lockers, are designed to withstand impacts without cracking or denting as easily as wood. They are more flexible and less prone to showing wear from physical abuse.  

Maintenance: Plastic lockers require very little maintenance. They can be easily cleaned with standard cleaning products, and they don't need painting or varnishing like wooden lockers, which can be subject to chipping and fading over time.  

Insect and Pest Resistance: Unlike wood, plastic does not attract insects such as termites, which can significantly damage wooden lockers over time. 

Durability Over Time: Plastic school lockers tend to maintain their appearance and structural integrity for a longer period compared to wood, which can deteriorate, especially in harsh or outdoor environments.  

However, it's worth noting that high-quality wooden lockers, when properly treated and maintained, can still offer decent durability in indoor settings with controlled environments. Wood provides a classic aesthetic that some prefer over the modern look of plastic. But in terms of pure durability and low maintenance requirements, plastic lockers are typically the more practical and longer-lasting choice.