These benches are rated at 100 pounds per foot of length:

4 foot Bench = 400 lbs Weight Capacity

5 foot Bench = 400 lbs Weight Capacity

6 foot Bench = 600 lbs Weight Capacity

8 foot Bench = 800 lbs Weight Capacity

10 foot Bench = 1000 lbs Weight Capacity

12 foot Bench = 1200 lbs Weight Capacity

15 foot Bench = 1500 lbs Weight Capacity