Score legal Rollcage design

[mcidge]

Okay,
So i'm ready to start my cage on what will be a class 7 truck. Truck will be built to score spec. I've done lots of research on the subject just one question left regarding two design styles.
Score states:
Rollcage must be constructed with at least one front hoop( top of cage to floor), and one rear hoop (top of cage to floor).- A and B Pillars correct?
OR- 2 lateral hoops, 2 interconnecting top bars, 2 rear down braces and one diaganol down brace.

What would be classified as a lateral hoop? Is this from front to back of cab?
Which method is best strength wise?
Does anyone have any pics of a current SCORE legal cage?
Thanks

[fullthrottle]

You really need to purchase a SCORE rule book, which will explain the requirements and also shows a drawing of the cage.;)

[mcidge]

already have one

[Zambo]

Yes, a lateral hoop would be one that runs from the frame, up the A pillar, back along the edge of the roof, and then usually out the back of the cab and continue down as the rear kicker. Connect these two hoops above and below the windshield. Run a B pillar down from this hoop to the frame. Connect the hoop and B pillar with horizontal tubes above and below the back window, and add diagonal bracing back here as well. Add in door bars and I think that's about it as far as legality of design, but Savage will want to see a bunch of gusseting and cross bracing in certain spots. I think people could argue all day about which way is stronger but I think if you use the required tubing size and have good craftsmanship it will be plenty strong either way.

[mcidge]

Perfect! Thats exactly what i was looking for. I didn't want to start bending up a bunch of tube without being sure on this. Time to get to work.
Thanks

[Zambo]

What I would do before you just trust some guy like me on the internet is draw out your idea and fax or email it to Savage and get a preliminary thumbs up. Good luck!

Personally, what I like about the lateral hoops is that the bends don't have to be so sharp like a back hoop. Its hard to believe how much the steel on the outside of the bend stretches when bending a 90 in 2" tube. Put a couple of marks on a straight piece of 2" and then bend it and then measure how much farther apart the marks are on the outside of the tube after you bend it.

[mcidge]

I take it Savage is the Score tech guy?

[Zambo]

Yes. Bill Savage is the guy who will inspect your cage.

Here's the link
SPD Products (http://www.spdproducts.com/)

[F.A.S.T.clothing]

I have the lateral design the front of the A-pillar at windsheild... does it have to be continous to the floor... mine connects to lower windsheild then another tube connects floor/frame to those two

[phantom lighting]

remember any truck over 4000 has to be 2 inch also

[partybarge_pilot]

I have the lateral design the front of the A-pillar at windsheild... does it have to be continous to the floor... mine connects to lower windsheild then another tube connects floor/frame to those two

Your going to need gussets on both sides of the windshield tube.

[AussieFSJracer]

Actually, a LATERAL hoop is one that goes from one side to the other, not lengthways. IE from the bottom of the A pillar up and across the top of the windscreen and down the other A pillar.

[AussieFSJracer]

Your main rear hoop would be a LATERAL hoop, as it is across the truck. My preferance is the make the main hoop a LATERAL one piece tube, a roof hoop from the top of the main hoop forward and across the top of the windscreen and back to the top of the hoop on the other side, then have 2 vetical A pillar tubes . All the joins will have a tube the same size as a gusset on 2 planes to strengthen the intersection of each tube.
Cheers from OZ. :D