Taken from the article...
"Well your teacher was right as its far heavier than the loads of steal, wood and concrete pickup trucks normally carry."
steal..
steal...
/shakes head
Yeah, this took 10 posts in to get to? I'm guessing most didn't read the article. Also, who the hell loads their truck up with asphalt? (To the asphalt vs. concrete crowd: even though that is not in the post I quoted, it is in the article...)
Also, if they are just going by manufacturer recommended payloads as "suspension destroying" then I gotta laugh out loud to that. I suppose I am a redneck, but where I grew up it was not uncommon to bow your leaf springs "real quick" to get a load of stone or soil home.
The only two parts you might damage in the shackle and spring, are not exactly expensive in most trucks. Considering the quality of this article, the author probably thinks carrying excessive loads will destroy your shocks and every bushing, but shocks
do not carry loads, and assuming the driver goes carefully over bumps, there is nothing wrong with this practice.
Payload is not just what the suspension can hold, but what the engine/trans are capable of propelling, and what the brakes are capable of stopping.