How much weight can Trampoline handles?

Saturday night my son asked me to come to the back windows. He said he want to show me something important. So I went. He pointed and said "you need to shovel the snow off the trampoline mama" I know that it needs to be done soon but I had no idea how bad it was. I asked him to go ahead and do it but he said he's only 5 and he is slow.
Anyway, I went out there after I got home from work today. I shoveled over a thousand pounds of snow and ice off that trampoline. It was so heavy that I worried it will collapsed while I'm on it. I was very careful but it took me about 2 hours to clear it out of snow. I wonder how much weight can this trampoline handle?