Alum.Dump how big of rock

Rock three inches long and at least one thick?

You will need to have a front end dozer who knows how to be gentle. Lay down the first layer in the bottom with two scoops and then go ahead and dump the rest in. We had stone trucks with steel buckets of about 30 foot trailer with mack R's and did not care less what went in there.

My old Dump was also a alumum bed, we hauled rock about that size constantly with no apparent damage but I am pretty sure if you really looked it over there are dents.

Aluminum is not my choice versus rocks. Especially if they are really big rocks.

 

I would not be afraid of 1X3 rock, especially with a liner.

 

I haul stone about that size almost daily in a steel frame aluminum dump. Trailer has some age but i dont see it causing anymore wear than I would consider normal. Been running the same haul for years in a triaxle before I got my own. The trailer I use has no liner. Only this is to make sure whatever area you are loading the stone isn't frozen into clumps. If so make sure the loader operator has sense enough to break it up. If not I'd ask them too because that will cause denting issues. Hope this helps and good luck.

 

1x3 rock won't do much damage to an aluminum bed even without a liner. You shouldn't worry about anything with that load ...well except tarping. Tarping 1x3 with a pull tarp sucks