Your carrying capacity as a Str 20 character = 20 × 15 = 300.
Then being a Large creature (from Powerful Build) doubles your carrying capacity to 600 lbs. Lifting to 1200 lbs.
The Bear Totem feature doubles your carrying capacity to 1200lbs. Your lifting capacity is 2400 lbs.
Having Enlarge cast on you doubles your capacity to 2400 and 4800 lbs.
Enhance ability cast on you raise your carrying capacity to 4800 lbs and lifting to 9600 lbs.
With a hook and tackle that's 38,400 lbs you can lift?
With this much strength I was wondering if there were any rules anywhere for ripping limbs off by sheer strength, and not from damage. Is it possible to tear a creature in half with close to the force of ten thousand pounds?
Does anyone know of anything that would make this possible? Is it even possible to do in D&D? What would you do if this came up? With this much strength can you simply throw 4000 lb boulders at creatures? Does that kill them instantly? Would a DM say you just can't be that strong? You are not allowed to pick up and fight with heavy things? Can you grab trees out of the ground and fight with them? I don't know what to do.
If you could throw massive boulders would you use the stone giant's rock attack while you have the strength to throw it? Is it an improvised attack? I don't know man. . .
Rock. Ranged Weapon Attack:range 60/240 ft., one target. Hit: (4d10 ) bludgeoning damage. If the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.
The question you should be asking is can you throw a tarrasque at a pesky flying wizard, and if so does it do more damage than a typical improvised weapon?
CypherSeven wrote:
Would you use the improv damage chart for the DMG if you tried to tear apart or crush creatures with this strength? What about if the target is grappled as a special melee action do 1d10 for every 1000lbs?
Unarmed damage of 1, plus 5 from the 20 Str bonus... so 6 damage. 
But more seriously, if one of my players did this I would probably make it into a skill check instead of a regular attack.
Also, lifting and throwing are quite different things. Olympic weightlifters don't go throwing those things around once they're over their heads.
Varden_Khol wrote:
CypherSeven wrote:
CypherSeven wrote:
As soon as you hit the strength of an oni, you can start breaking mountains as far as I'm concerned
Cause an Oni can break anything it wants to