Triples are heavy, thats true
But what is most difficult is extending them. You have to lift two sections with one hand for which you need to have superman arms. Otherwise you can scrape them up the wall they're leaning against, but thats not always possible.
Its also fun getting them on and off the roofrack.
Its all possible, but if you can find a different way to clean without having to use them, I'd recommend that instead.