Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

[triptester]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

The legs being flared out too far increases the tendency for the top bar to bend.

 

[FTG-05]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

The legs being flared out too far increases the tendency for the top bar to bend.

I've had problems bending 1/2" rebar with it snapping, so I didn't try to bend those legs too much and having it do the same; otherwise they would have been a little more vertical. If 3/4" rebar doesn't work, I may have to add a vertical rebar piece to each one, we'll see.

Definitely not one of my usual "way overkill" jobs.

ETA: thanks for the suggestions on the washers, I'll try that!

 

[SPYDERLK]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

I've had problems bending 1/2" rebar with it snapping, so I didn't try to bend those legs too much and having it do the same; otherwise they would have been a little more vertical. If 3/4" rebar doesn't work, I may have to add a vertical rebar piece to each one, we'll see.

Definitely not one of my usual "way overkill" jobs.

ETA: thanks for the suggestions on the washers, I'll try that!

To prevent snapping you have to grind the ribbing off the rebar in the areas to be bent.

 

[Sodo]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

I'm not following you. Rebar is made for concrete consruction, its a malleable steel, you can generally bend it as tight as you want, tight 90s and it doesnt snap. 1/2" especially. If you bend it a few times in one location of course it will break.

On the target project, it looks to me like there will be a lot of friction between the rough rebar & the pipe "hinge". Which gets worse when the rebar curves while inside the straight pipe hinge - it binds up.

I can see you want to be able to take it apart & store easily, move & setup quick. But if you were to weld those Sq tube receivers like a "T" and poke them in the dirt vertical they don't add bending forces to the main crossbar. Or add a vertical support (like a tripod) on left & right to straighten it up.

 

[SPYDERLK]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

Iv seen problems with a sharp bend. So has OP apparently. Grinding off the ribbing will alleviate it if you experience it.

 

[ozob2k]

I use chain and weld it to the target so it hangs with a forward tilt to minimize ricochets. Can use chain for the cross link if needed. Just need to have secure rnd frames.

 

[BigRol]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

Hope nobody heads up that trail while you're shooting:laughing:

 

[FTG-05]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

Hope nobody heads up that trail while you're shooting:laughing:

Well, if they do, they're trespassing.

And stupid.

 

[FTG-05]

Re: Which will bend less or be more rigid: 3/4" rebar or 3/8" black iron pipe?

To prevent snapping you have to grind the ribbing off the rebar in the areas to be bent.

Well crap, learn something new every day!

Thanks,

 

[4570Man]

To prevent snapping you have to grind the ribbing off the rebar in the areas to be bent.

I have never had such problems. I do heat it first.