Sport Climbing tree, need some advice

Im building a top roping/ sport climbing tree in my back yard on a big white oak and need some advice on how to bolt/screw in the hangers. we used 6inch grade 5 lag screws and the threads or the screws wouldn't hold and came out when mildly over tightened, by hand. we are using hangers with a 3/8ths hole. I cant seem to find anything online to help out so i figured id go here. I'd appreciate any advice I can get.

Save a tree, build a woody!

mountainproject.com/v/what-…

Alex Mitchell wrote:Save a tree, build a woody! mountainproject.com/v/what-…

There is no way your stripping a 6" lag in white oak by hand... Save the tree and climb some rock:)

Congrats. You bolted a 5.2 into a tree that will be fun to climb. Once.

I'm over in Natick, i would be glad to meet you at the gym and give you a belay any day of the week. But for Christ sake lay off on the dam tree would yah...

eric parham wrote:There is no way your stripping a 6" lag in white oak by hand.

Yeah, seriously lame idea. Leave the tree alone.

sollie wrote:I cant seem to find anything online . . .

Put the lag screws back in and give the tree some time to grow and seal up the holes.

Those bolts will be super bomber, at least until the tree grows over your bolts and hangers.

sack up and climb it without adding a jug every foot.

I call troll.

at least it's a ground up effort. For real this is the most ridiculous post I've seen.

Josh Kornish wrote:at least it's a ground up effort. For real this is the most ridiculous post I've seen.

Andrewprime1 wrote: Haha, ground up tree climbing.

What would Julia 'Butterfly' Hill think of this tree attack...