Scout II Traveler roll cage

Discussion in 'General IH Tech' started by Odmark, Jun 24, 2019.


  1. Odmark

    Odmark Farmall Cub

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    Im going to build a full 6 point roll cage in my 77 Scout Traveler and im looking for some advice. Im going to run the bar trough the floor and weld it to the frame.

    What size tubing would you recommend? If any of you done this i would really appreciate some pictures.
     
  2. winchested

    winchested High Wheeler

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    Most pro cages are made with 1 3/4" I believe.
     
  3. Ron A

    Ron A High Wheeler

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    2.000" x .120 wall. Here are the guidelines for a SCORE legal cage. Probably more info than you wanted but I figured I would post it all.


    Up to 2000 lbs. 1.500” x 0.095” CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
    2001 - 2500 lbs. 1.500” x 0.120” CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
    2501 - 3000 lbs. 1.750” x 0.095” CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
    3001 - 4000 lbs. 1.750” x .120” CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM
    Over 4000 lbs. 2.000” x 0.120” CDN/4130/Seamless or ASTM 1018/1026 CDS/DOM

    VEHICLE SAFETY EQUIPMENT
    CR33 ROLL CAGES All vehicles in competition except Motorcycles and ATV’s must be equipped with a roll cage. Minimum design and tubing size based on seamless 4130 chromoly tubing or ASTM 1018/1026 CDS/DOM. No aluminum or other non-ferrous material permitted. Material Material for roll cage construction must be 4130 chromoly tubing or ASTM 1018/1026 CDS/DOM. All welding must be of the highest quality with full penetration and no undercutting of the parent metal. All welds shall conform to the American Welding Society D1.1, Structural Welding Code, Chapter 10, Tubular Structures and Standards for the material used (see AWS. Org). It is strongly recommended that the welder inspect all welds using Magnaflux™, die-penetrate, or other effective methods. All tubes must be welded 360-degrees around the circumference of the tube. No oxy-acetylene brazing or welding allowed. Good external appearance of a weld does not necessarily guarantee its quality, poor looking welds are never a sign of good workmanship. None of the tubing may show any signs of crimping or wall failure. All bends must be mandrel type. The center radius of the bends may not be less than three (3) times the outside diameter of the roll cage tubing. It must be emphasized that the use of heat-treated or high carbon steels may cause problems and that bad fabrication may result in a decrease in strength (caused by brittle heataffected zones), inadequate ductility and internal stress.
    Roll Cage Tubing Sizes
    For the purposes of determining roll bar tubing sizes, vehicle weight is as raced, as sitting on the starting line, but without fuel and driver. Note: There is an allowance of minus 0.010 inches on all tubing thicknesses. Minimum tubing size for the roll cage is: Construction Procedures Cages must be securely mounted to the frame or body and gusseted and braced at all points of intersection. Cab or body mounted cages must not be attached to the body structure by direct welding, but must be bolted through and attached by the use of doubler plates (one on either side) with a minimum thickness
    GENERAL REGULATIONS
    © 2015 SCORE International, All Rights Reserved
    of .187”, see Figure 4. Where bolt and nuts are used the bolts shall be at least .375” diameter SAE Grade 8 or equivalent. Roll cage terminal ends must be located to a frame or body structure that will support maximum impact and not shear. Minimum material dimension requirements for roll cages apply to the following members of the roll cage: (1) Front and rear hoop (2) Front and rear interconnecting bars (3) Rear down braces (4) Lateral bracing (5) Elbow and door bars (6) Lower A-pillar tubes, and lower B-pillar tubes Roll Cage Design All roll cages must be constructed with at least one (1) front hoop (top of cage to floor), one (1) rear hoop (top of cage to floor), or two (2) lateral hoops, two (2) interconnecting top bars, two (2) rear down braces and one (1) diagonal brace and necessary gussets, see Figure 1. If front and/or rear hoop terminate at elbow/door bar, lower A-pillar and/or B-pillar must be made of same tubing size as roll cage. Upper main, front, rear, and lateral roll bar hoops must be made in one piece without joints. Centerlines of all required tubes must converge at intersections. Any vehicle that is not provided with stock steel doors for its driver and co-driver must be equipped with sidebars, at least one on each side that will protect the occupants from the side. These bars must be parallel to the ground (or as close to parallel as is practical) and be located vertically in relation to the occupants to provide maximum protection without causing undue difficulty in entering or exiting the vehicle. The sidebars must be formed of tubing of the same material and dimensions as the roll cage itself and must be securely attached to the cage’s front and rear members. Additional side tubes may be required to limit cockpit intrusion, these additional tubes must be of the same size tubing as the roll cage. Tubes must be placed in such a manner as to limit openings adjacent to the occupants. Maximum opening size in this area is limited to 370 square inches. All roll cage bars must be at least 3” in any direction from the driver and co-driver’s helmets while they are in their normal driving positions. Gussets must be installed at all main intersections on the main cage including diagonal and rear down braces, and where single weld fractures can affect driver’s safety. Gussets may be constructed of .125” X 3” X 3” flat plate, split, formed and welded corner tubing, or tubing gussets the same thickness as the main cage material, see Figure 2 and Figure 3. Rear down braces and diagonal braces must angle no less than 30 degrees from vertical. An inspection hole of at least .187” diameter must be drilled in a non-critical area of the roll bar hoop to facilitate verification of wall thickness maybe required. Any cage or chassis that has been built after January 1, 2006 must be identified by means of an identification plate affixed to it by the manufacturer; this identification plate must be neither copied nor moved (i.e. embedded, engraved or self destroying sticker). The identification plate must bear the name of the manufacturer, a serial number, and the date of manufacturer. Head/neck restraints designed to prevent whiplash are required on all vehicles. These restraints must be a headrest of approximately 36 square inches, with a resilient padding at least 2” thick. Any portion of the roll bar or bracing which might come in contact with the helmet must be padded.
     
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  4. winchested

    winchested High Wheeler

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    There we go. I was thinking of cars as that's what I've seen most of. Good to know the over 4k lbs is 2".
     
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  5. Ron A

    Ron A High Wheeler

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    All based on weight. I can post pictures later.
     
  6. Ron A

    Ron A High Wheeler

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    This is an old cage (1976), but it was SCORE legal at least through 1997. Frank Howarth built it. Not much to add provided the pictures all work. I have never tried to download this many at once. Looking at old pictures it appears most of the cages he built for racing followed this same basic design. The top cover for the cage is aluminum.
     

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  7. Ron A

    Ron A High Wheeler

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    From the side and in better light. The old pics are of the Mulligans, in a Terra/Traveler, with a Howarth built cage
     

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  8. Ron A

    Ron A High Wheeler

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  9. mongocanfly

    mongocanfly Binder Driver

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    that's a good chart Ron put up...when we did drag car cages we used 1-5/8 dom for structure and 1-1/4 for short bracing...its all about how you triangulate it...
    I have another truck im building a full tube chassis for and im using 1-3/4 dom for the main structure..
    if your doing it yourself you need a good tubing bender...
    the frame may be to narrow to run the tube thru the floor to the frame and keep your cage the full width of the body..youll probably need standoffs to do this
     
  10. chris san diego

    chris san diego Farmall Cub

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    Hi Odmark, I have a Scout II Traveler Cage (Kit) from D&C Extreme. It is 2″ Hot Rolled Electric Welded (HREW) tube; I upgraded to certified Drawn Over Mandrel (DOM) tube and included front and rear Atari bars, a set of Flat Plate Roll Cage Legs, seat belt bungs, and grab handles. The cage is shipped in segments and requires installation with a minimum 220v/175a MIG Welder and .035 wire. The flat plate roll cage legs are flat 5/16″ plate legs that follow the contour of the body to the floor and bolt down to the floor board, giving more room in the front. I hope this helps! Vendor page on Binder Planet: http://www.binderplanet.com/forums/index.php?forums/d-and-c-extreme.61/
     
  11. steve shepard

    steve shepard Farmall Cub

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    Hi Chris, just wanting to clarify your recent post..... it looks like you are saying that you have a DandC traveler hrew roll bar kit (extra)
    are you selling?
     
  12. chris san diego

    chris san diego Farmall Cub

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    Nope, I'm not selling, just sharing info.
     
  13. chris san diego

    chris san diego Farmall Cub

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