Is external bracing possible?

[malandrin4o8 10+ year member]

Long story short I forgot to add my rods for internal bracing and my box flexes //content.invisioncic.com/y282845/emoticons/furious.gif.fc81ca146dbff91fede3ed290dbc4f4c.gif, is there anyway I can brace it externally? If not so I can redo my box again...

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[timhof13 10+ year member]

Buy a welder and some steel, I'm sure you can do something to help

 

[big scott]

Buy a welder and some steel, I'm sure you can do something to help

wow all that....

op

just get some threaded rods. drill hole in box, put rod in, used a washer on each side then use nuts. theres your bracing.

 

[malandrin4o8 10+ year member]

wow all that....
op

just get some threaded rods. drill hole in box, put rod in, used a washer on each side then use nuts. theres your bracing.

Does the threaded rode have to be a certain size or will 1/4" do?

 

[Jeffdachef 5,000+ posts]

Does the threaded rode have to be a certain size or will 1/4" do?

you'll need multiple with thinner ones.

 

[malandrin4o8 10+ year member]

you'll need multiple with thinner ones.

What would be a good size?

 

[Boomin_tahoe 5,000+ posts]

wow all that....
op

just get some threaded rods. drill hole in box, put rod in, used a washer on each side then use nuts. theres your bracing.

This. Use the biggest threaded rods money can afford/buy. The thicker, the better (Thats what she said) On a serious note, get some washers and nuts with it also. 3/4" should work.

Or...remove the subs and shove some stacked mdf in there or 2x4's.

 

[jeepguylv]

allthread from home depot, last time I bought it about a year ago it was $20 for 10 ft. of 7/8" the nuts are probably like a buck ea. washers like 20 cents or 40 cents ea.

 

[shizzzon 10+ year member]

Threaded rod by itself *****.

All its going to do is prevent the box from falling apart.

its bracing is worthless without steel plating at the rods.

without plating, bracing area is roughly 3" radius.

You are better off using 2x4s as the cheapest option.

If you want to go real strong yet cheap, get piping installed with the correct flanges.

Funny though.. all recommendations are for internal bracing.

In competition, external bracing is highly and many times only used.

 

[Boomin_tahoe 5,000+ posts]

Threaded rod by itself *****.
All its going to do is prevent the box from falling apart.

its bracing is worthless without steel plating at the rods.

without plating, bracing area is roughly 3" radius.

You are better off using 2x4s as the cheapest option.

If you want to go real strong yet cheap, get piping installed with the correct flanges.

Funny though.. all recommendations are for internal bracing.

In competition, external bracing is highly and many times only used.

First of all hi shizzzon.

Secondly, if he does choose to use 2x4's, he's messing around with internal volume. May not be much but still interfering with it. I see all thread installs all the time. If it didn't work, then explain why they don't, even tho you kinda did, but didn't stop those who used them. I have seen many times over internal and external bracing. If external bracing wasn't used then how is external gonna help?? If the OP can easily remove the subs and shove some bracing in there, why not?!

 

[shizzzon 10+ year member]

I know 2x4s is messing with internal bracing...

Thats what is so funny with this thread.

He's asking about external bracing and everyone is suggesting internal..

Isnt that ironic?

So i figure to suggest as well.

You may see allthread installs all the time because thats just what they know..

Its like saying peel n seal works as sound deadening... i see it all the time...

Know what i see?

Pipe bracing, external bracing( 2x4s, steel, concrete), internal bracing (pipe bracing, window bracing, fiberglass bracing).

But i didnt suggest all that because this application doesnt call for it.

Wood bracing, window preferred, is good but window is out since its already built.

Internal bracing is never preferred because it has potential to increase turbulence reducing spl.

His question was about external bracing... not internal or both.

Internal is all that is necessary for this application hence why i myself suggested internal over external because i read the application.

 

[Boomin_tahoe 5,000+ posts]

I know he said external bracing...which is why I suggested...removing the subs if he's able to. That way he can still do so if he chooses.

Has your theory been proven as far as internal bracing reducing SPL?? (Would like to see a test done with same box with internal bracing vs. another same box w/o it and see some difference in numbers) Not everybody is chasing numbers ya know.. maybe he's in it for a ground pounder.

 

[shizzzon 10+ year member]

It's not a theory, it's a fact.

And also... read what i am posting.

I keep suggesting internal bracing so do not think im advising for competition.

 

[Boomin_tahoe 5,000+ posts]

Post up link then

 

[shizzzon 10+ year member]

Post link to what?