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r1inoz
50cc nipper
Joined: 18 Sep 2011
Posts: 6
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 Posted: Mon Oct 24, 2011 4:29 pm Post subject: tube vs square bar |
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hey guy
just after opinions of the advantages of tube over square bar for roll cages.
is there any problem with using square bar for a roll cage if the welds are of a high quality?
ty |
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yogie
Moderator
Joined: 14 Feb 2006
Posts: 3620
Location: The Otways
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| Posted: Mon Oct 24, 2011 6:25 pm Post subject: |
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round tube is stronger in the sense that it will handle stress a lot more because unlike shs or rhs it has no sides or edges that can fail on a edge, yes tube will fail also but not as quick, google it I'm starrting to confuse myself now... 
my thought is tube is stronger than shs or rhs
_________________
2005 KFX700
With a few bells and whistles
and the twin yoshi's 
American Star A-arms, tie rods
elka stickers
Shorty Shifter
I have a Waco
rossco gave me a flexx sticker 
honda thumb
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durablue stickers |
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Bearded-Joker
50cc nipper
Joined: 21 Sep 2011
Posts: 1
Location: Jimboomba
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| Posted: Mon Oct 24, 2011 7:22 pm Post subject: |
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Hey mate go the tube coz its stronger than equivelent size rhs/shs. Its because that being circle it evenly distributes the load around the circumfrence. I think thats right.
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It's all fun and games till someone gets hurt, If it ain't you then it's bloody funny. |
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yogie
Moderator
Joined: 14 Feb 2006
Posts: 3620
Location: The Otways
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| Posted: Mon Oct 24, 2011 7:35 pm Post subject: |
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| Bearded-Joker wrote: | | Hey mate go the tube coz its stronger than equivelent size rhs/shs. Its because that being circle it evenly distributes the load around the circumfrence. I think thats right. |
thats exactly what I wanted to say....
_________________
2005 KFX700
With a few bells and whistles
and the twin yoshi's
American Star A-arms, tie rods
elka stickers
Shorty Shifter
I have a Waco
rossco gave me a flexx sticker
honda thumb
Great at climbing trees
durablue stickers |
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Mad Fab/Snake Racing atv
50cc nipper
Joined: 22 Jul 2011
Posts: 32
Location: Sydney
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| Posted: Mon Oct 24, 2011 8:30 pm Post subject: |
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| Tube is much stronger make sure it is seam-less you do not need crome-moly 4 a roll cage as you can not stress releave it like you can when you build a chassis (heated up 2 releave it) hope that helps |
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bullet
The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Mon Oct 24, 2011 9:13 pm Post subject: |
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Strength to weight ratio, round tube is strongest.
2 inch square weighs significantly more than 2 inch round, so you would be adding more steel for no advantage if you use square.
Also adding it up top... where any extra weight actually contributes to a higher centre of gravity, and increases roll over risk 
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Can-Am X Team
Bullet #Y12. MrsB #Y18. |
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r1inoz
50cc nipper
Joined: 18 Sep 2011
Posts: 6
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| Posted: Tue Oct 25, 2011 8:16 am Post subject: |
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cool thanks guys,
just wanted a few different opinions ty |
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feralkid
The Day Starts With OZATV !
Joined: 29 Oct 2007
Posts: 1567
Location: North Western Victoria
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| Posted: Tue Oct 25, 2011 3:15 pm Post subject: |
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Plus I'd rather smash my head against something round than the point on something square.
_________________
"If in doubt go flat out"
"Nothing worth having is easy to get" |
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