Scca Role Bar Requirements
 

The title preety much says it all.. I need to the the scca/nasa spec requirements for a role bar.. i have a 88 fc vert.. any info you guys have even a website that would have it for my car would be great. Plus any suggestions on what metal i should use, thickness ,tube size. all of it would be wonderful

Thanks

Scca Role Bar Requirements
 

The title preety much says it all.. I need to the the scca/nasa spec requirements for a role bar.. i have a 88 fc vert.. any info you guys have even a website that would have it for my car would be great. Plus any suggestions on what metal i should use, thickness ,tube size. all of it would be wonderful

Thanks

Well, did you bother to look in SCCA or NASA rulebooks to find out?

www.scca.org, http://www.nasaproracing.com/rules/ccr.pdf

The SCCA GCR will tell you everything you need to know
Get a copy rather than hearing it second hand here and getting potentially bum info.
www.scca.com
Crispy

start here:
http://www.scca.com/Club/index.asp?reference=gcr
section 9.4.2

sorry, start at section 9.4 of GCR

1.5 x .120" DOM. Cage design will differ with class. Check out the Show your Cage pics in this section

Following is the site for SCCA. On this page noted you will find you may download the General Competition Rules (GCR) & seperatly the rules for each class. I don't know stink about nasa but will guess that if it's legal in SCCA it's legal in nasa. From your post you sound like your new to the roll cage business therefore DON'T have some half assed roll cage built by someone who thinks they know the rules. There is a guy by the name of Scott who owns Izzy's custom cages in St Louis who will most likely pop in on this conversation. Great fabicator who knows the SCCA rules.

www.scca.com/Club/Index.asp?IdS=054DDE-CC22A10&x=030|057&~=

Quick question: are you talking about a roll-BAR for Solo-I/II and PDX/HPDE type events? or are you talking about a full roll-CAGE, which is required for any sort of door-to-door racing (along with a lot of other safety equipment)?

The SCCA GCR covers door-to-door racing. The SCCA Solo Rules cover the other event types. Both are available at www.scca.org .

-bill

Ditto with what others have said.
Are you sure you don't want a "street/style" bar? One hoop won't get you on the track :)

http://www.nasaproracing.com/rules/ccr.pdf

NASA HPDE Roll bar rule-

11.4.7 Roll Bars
All open cars should have a roll bar installed to help protect the occupant(s) from injury
during a roll-over. The roll bar should be able to withstand the compressional forces
involved in supporting the full weight of the car. The roll bar’s main hoop should extend
the full width of the car (except certain cars that have been approved by NASA). The
main hoop shall be one continuous piece with smooth bends and no evidence of
crimping or wall failure shall be present (i.e. should be Mandrel bends). All welds should
be of the highest possible quality, with full penetration [Ref:(15.6.15)]. All cars with roll
bars are required to have adequate roll bar padding per CCR section #15.6.4. In cases
where the driver’s head may come in contact with the roll bar should the seatback fail, a
seatback brace is required in conformance with section #15.6.22. The material and
minimums are as follows: (All cars with full roll cages should conform to the applicable
sections found in section #15.0.)
Vehicle weight DOM or ERW
Under 2000 lbs. 1.50" x .120”
2001 - 3500 lbs. 1.75" x .120"
Over 3500 lbs. 2.00" x .120"
Vehicle weight Alloy (CM)
Under 1500 lbs. 1.375" x .095”
1501 - 2500 lbs. 1.625" x .095"
Over 2500 lbs. 2.000" x .095"


NASA Roll Cage rule-

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15.6 Roll Cage
(See diagram at end of section)
15.6.1 Purpose
The basic purpose of the roll cage is to protect the occupant in case of a rollover or a
collision. It should be able to withstand the weight of the car landing on the roof. These
rules apply to all classes, unless otherwise superseded by the class rules. Vehicles
homologated by, or built to the specifications of, SCCA, IMSA, and Grand AM must
conform to these rules, or may conform to their respective current class rules for roll
cage requirements for guest groups and special events. Any vehicle that does not
conform to the NASA cage rules, yet conforms to cage rules of another recognized
sanctioning body (SCCA, IMSA, Grand Am, etc.), that wishes compete in NASA events
on a regular basis, should be ordered to make modifications within a time frame
specified by the Race Director and approved by the Regional Director. Note- It is the
responsibility of the driver to furnish a copy of any non-NASA rules applicable to his/her
vehicle.
15.6.2 Intent
Chassis stiffening is a side benefit of a good roll cage system, but it is not the intent of
these rules. Parts of the cage deemed by the Chief Scrutineer, to serve no practical
purpose other than chassis stiffening may be considered in violation of the intent of
these rules (Note: Some class rules allow for chassis stiffening.). The Chief Scrutineer
may order the removal of said parts, or require that the vehicle owner redesign,
reconstruct, and re-certify the roll cage if warranted. The removal or redesign of the
cage, whole or in part, to comply with these rules, does not imply that penalties will not
be issued for violating the intent of these rules.
15.6.3 Installation
The cage may be removable or may be permanently welded, or any combination
thereof, providing that all aspects of the cage meet these rules.
15.6.4 Padding
All roll cage surfaces that may come in contact with the driver should be padded with
high-density padding such as Ethafoam or Ensolite. It is recommended that padding
meeting SFI specification 45.1 be used.
15.6.5 Bends
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.
15.6.6 Main Hoop
The main roll cage hoop should be as wide as the full width of the interior and must be
as close to the roof as possible without violating CCR section #15.6.20 Inspection. One
continuous length of roll bar tubing shall be used as the main hoop. The main hoop
must consist of not more than four (4) bends maximum, totaling one hundred eighty
(180) degrees +/- ten (10) degrees.
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15.6.7 Diagonal Brace
At least one (1) diagonal brace shall be used in the same plane as the main hoop. One
end of the diagonal brace shall attach to the corner, or horizontal part, of the main hoop
above the driver’s head, within twelve (12) inches of the driver’s-side corner. The other
end of the diagonal brace shall attach to the mounting plate (or to the main hoop as
close to the mounting plate as practically possible) diagonally opposed to the driver’s
head (passenger floor).
15.6.8 Forward Hoops (Option 1)
The forward hoops shall extend from the main hoop (in a forward direction) to the floor
by following the roof and the “A” pillar of the car. There shall be a bar connecting the
two (2) forward hoops at the top of the windshield mounted as close to the roof as
possible without violating CCR Section #15.6.20 Inspection. The forward hoops shall
incorporate no more than four bends each. Optionally a “15.6.9 Halo Hoop (Option 2)”
or “15.6.10 Front Hoop (Option 3)” construction may also be acceptable.
15.6.9 Halo Hoop (Option 2)
A “halo bar” extends from the main hoop (in a forward direction) following the roof line to
the windshield then following along the top of the windshield, then following the roof line
back to the main hoop, thus creating a “halo” over the driver’s head. A “halo” bar shall
be constructed of one (1) continuous piece of tubing. One (1) down tube following the
“A” pillar must support the “halo” on each side of the car. The down tubes shall
incorporate no more than two (2) bends each.
15.6.10 Front Hoop (Option 3)
A “front hoop” is a bar that extends up from the floor, then follows the “A” pillar up to the
roof, then follows the roof line across the top of the windshield, then back down the other
“A” pillar, and then terminates on the floor. There must be one (1) horizontal bar
(following the roof line) connecting the main hoop and the forward hoop on each side of
the car. The front hoop shall incorporate no more than four (4) bends.
15.6.11 Rear Braces
The main hoop must have two (2) braces extending to the rear. The braces shall be
attached as near as possible to the top of the main hoop, and no more than six (6)
inches below the top. The braces must not contain any bends*. There must be at
least 30 degrees between the plane of the main hoop and the plane of the rear braces.
The main hoop rear braces shall be installed to form no more than a one hundred five
(105) degree angle or no less than a seventy-five (75) degree angle with the main hoop
when viewed from the top. The main hoop braces may be mounted at the rear shock
mounts or suspension pickup points (providing that the braces remain in compliance with
all other sections of the CCR). They may go through any rear bulkhead(s) provided the
bulkhead(s) is sealed around the cage braces. *There may be certain exceptions
allowed for cars that cannot possible meet this “no bend” requirement. One exception is
listed [Ref:(15.6.11.A)]. Other exceptions may be made (not guaranteed) if all of the
required bars meet the specifications for a vehicle in the next heavier weight
classification and the alternative design is submitted to the NASA National Office for
special allowance.
15.6.11.A Rear Braces - Exceptions
On cars where the rear window/bulkhead prohibits the installation of rear braces
(Porsche 914, Pontiac Fiero, etc.) the main hoop must be attached to the body by plates
welded to the cage and bolted to the stock shoulder harness mounting location. There
60
must also be a diagonal bar connecting the top of the main hoop to the lower front
passenger side mounting point (“Petty bar”). Some cars built for racing in other
recognized sanctioning bodies may be granted a waiver of this rule, however they must
show proof of compliance with the current published rules for their class.
15.6.12 Door Bars / Side Impact Protection
At least one (1) door bar on driver side and one (1) on the passenger side must be used.
At least two (2) door bars on the driver side and one (1) door bar on the passenger side
must be installed in all vehicles that obtain a new logbook after January 1st, 2007.
All vehicles, regardless of date of manufacture or date of logbook issuance will be
required to have at least two (2) door bars on the driver side and one (1) door bar on the
passenger side starting January 1st, 2011.
Unless superseded by class rules, modifications to any non-chassis structure (such as
door panels, inner door sheet metal, windows, door internals, etc.) may be made to
accommodate any allowed door bar configuration. However, removal of material and /
or modifications is limited to 1) the least amount to accommodate the door bar(s), and 2)
can serve no other function. Holes in the door jam (B-pillar) may be permitted to
accommodate door bars; however the structure should not be “notched” so as to weaken
it.
The driver’s door window glass, window operating mechanism, armrest, map pockets,
door panel, and inside door latch may be removed providing that is for the sole purpose
of installing “NASCAR” style door bars.* The stock side impact beam, if equipped, and
the outside door latch/lock mechanism shall not be removed or modified.
*This gutting of the door is only permitted on driver’s door and, if undertaken, the roll
cage must incorporate at least two (2) NASCAR style door bars that extend into the
door. Certain class rules may supersede this rule. “NASCAR Style” means to NASCAR
specification in regard to configuration. For example, the two required bars should be
parallel with respect to each other, and contain the appropriate vertical support tubes.
See NASCAR rules for more information.
15.6.13 Mounting Points
The roll cage shall be mounted to the floor of the car in six, seven, or eight points. The
cage shall not go through the firewall. The seventh and eighth points must attach to the
firewall or front fender wells. All cage attachment points must be mounted to plates.
Each required cage bar shall terminate on a plate with a 360 degree weld to the
mounting plate, except as specified in Section 15.6.14.B. There shall be only one (1)
mounting “point” per plate. This point is defined as where the “required tube” mounts.
All additional tubes mounted to that plate must be mounted as close to the required tube
as possible [Ref: (15.6.14.B)].
15.6.14 Mounting Plates
Each mounting plate shall be no greater than one hundred (100) square inches and no
greater than twelve (12) inches or less than two (2) inches on a side. Welded mounting
plates shall be at least 0.080-inch thick. Plates may extend onto vertical sections of the
structure. Any mounting plate may be multi-angled, but shall not exceed one hundred
(100) square inches total including vertical sections. Each mounting plate should have
an area of not less than nine (9) square inches.
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15.6.14.A Mounting Plates – Bolt-In Cage
The attaching points of a bolt-in cage to the body must use reinforcing plates to
sandwich the body. At least three (3) bolts are required for each bolt-in plate and the
plate must be at least 3/16 inch thick. All hardware must be SAE Grade 5 or better with
5/16” diameter minimum. All nuts must be held securely by a locking system such as
safety wire, lock washer, Ny-lox, or jam-nuts.
15.6.14.B Tube / Mounting Plate Specifications
Any number of tubes may attach to a plate so long as they are touching each other at
the plate. There may be a small gap between tubes to allow welding 360 degrees
around each tube. If there is no gap between the tubes, they must be welded around
the base as much as possible to form a single figure-eight weld, AND the tubes must be
welded to each other two (2) inches up from the base plate.
15.6.15 Welds
All welding must be of the highest quality with full penetration and shall conform to the
American Welding Society D1.1, 1994 Edition, Structural Welding Code, Chapter 10,
Tubular Structures and Standards for the material used. Arc welding should be used
whenever possible. It is strongly recommended that the welder inspect all welds using
Magnaflux™, x-ray, or other effective methods. All tubes must be welded 360-degrees
around the circumference of the tube.
15.6.16 Tube Structure Design / Body
Tubes may touch the body in any place (not to violate CCR section #15.6.20 Inspection),
but shall not be attached anywhere except as permitted by CCR Section #15.6.11.A
Rear Braces - Exceptions. No deformation of the interior body panels is permitted,
except that the horizontal part of the sheet metal (next to the driver’s and/or passenger’s
head) between the top of the “B” pillar and the top of the “A” pillar, may be pushed in to
accommodate the roll cage. The intent of this allowed deformation is strictly to allow for
more headroom for the driver and/or passenger.
15.6.17 Additional Reinforcement
Any number of additional reinforcing bars are permitted within the structure of the cage
provided that they are installed strictly for safety and do not violate CCR Section #15.6.2
Intent. This rule does not permit reinforcements in classes with spec cages.
All required bars must be made of the same material and meet with at least the minimum
specifications for size and thickness.
15.6.18 Roll Cage Tubing Sizes
For the purposes of determining roll bar tubing sizes, vehicle weight is as raced, 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:
Up to 1500 lbs.
1.375” x 0.095” Chrome-moly / Seamless mild steel (DOM)
1501 - 2200 lbs.
1.500” x 0.095” Chrome-moly / Seamless mild steel (DOM)
1.500” x 0.120” ERW* (No issuance of log books for cars with ERW cages 04/30/03)
*Note- Specifications listed for reference for inspection of grandfathered vehicles.
2201 - 3000 lbs.
1.500” x 0.120” Chrome-moly / Seamless mild steel (DOM)
1.750” x 0.095” Chrome-moly / Seamless mild steel (DOM)
1.750” x 0.120” ERW* (No issuance of log books for cars with ERW cages 04/30/03)
*Note- Specifications listed for reference for inspection of grandfathered vehicles.
3001 - 4000 lbs.
1.750” x .120” Chrome-moly / Seamless mild steel (DOM)
No ERW allowed.
Over 4000 lbs.
2.000” x 0.120” Chrome-moly/Seamless mild steel (DOM)
No ERW allowed.
15.6.19 Bending Allowances
If the maximum number of bends permitted for any one bar is exceeded, all required
components shall be made from the tubing size listed for the next heavier category and
must be approved by a NASA race tech shop or scrutineer.
15.6.20 Inspection
A 3/16-inch inspection hole must be drilled in each of the required bars in a non-critical
area for the purpose of determining wall thickness. All welds, except those mounted to
plates on the floor, must be accessible for inspection (360 degrees).
15.6.21 Head Restraint
A head restraint must be used to help prevent whiplash. The head restraint should have
a minimum area of thirty-six (36) square inches and be padded with a non-resilient
material such as Ethafoam or Ensolite with a minimum thickness of one (1) inch. It is
recommended that padding meeting SFI specification 45.2 be used.
15.6.22 Seat Back Support
A seatback support must be made to hold the seat from going back in the event of a
crash. A plate should be used to distribute the load. No bolts, corners, or sharp objects
should be placed in such a manner that could lead to a possible puncture of the driver in
a high impact crash. Proper design and installation is crucial to safety and it is
recommended that the driver employ the services of a professional race car builder for
this, as well as all other vehicle safety items. An exception may be made for those
seats homologated to, and mounted in accordance, with FIA 8855-1999 standards.
Those seats that qualify for the aforementioned exception must conform to the entire FIA
8855-1999 set of regulations. This includes a mandatory seat replacement, or use of a
seat back brace, for any seat more than five (5) years old. Please reference the FIA
regulations. http://www.fia.com/

Dude, great job on the google! :icon_tup:

Actually it was a cut and paste from the NASA CCR. I tried to do it for SCCA, but I always have prblems with it locking up on me. I'll keep trying to get their specs up.

9.4. DRIVER PROTECTION STRUCTURESThese general specifications are for all automobiles. Roll cages are required in all automobiles. Roll cages may be of two (2) designs, low front hoop (top of steering wheel) or high front hoop (top of windshield). Specific installations are subject to approval by the Technical and Safety Inspectors at each event.The Technical Staff of Club Racing shall have the responsibility to ensure specification compliance with SCCA safety standards. To that end, the Technical Staff of Club Racing may or may not accept alternate construction standards from any source that significantly vary from SCCA standards of protection.9.4.1. BASIC DESIGN CONSIDERATIONSA. The basic purpose of the roll cage is to protect the driver if the car turns over, runs into an obstacle such as a guardrail or catch fence, or is struck by another car. It shall be designed to withstand compression forces from the weight of the car coming down on the rollover structure and to take fore/aft and lateral loads resulting from the car skidding along on its rollover structure.B. A system of head rest to prevent whiplash and rebound, and also to prevent the driver’s head from striking the underside of the main hoop shall be installed on all vehicles. Racing seats with integral headrests shall also meet this requirement and have a support to the main hoop. Seats homologated to, and mounted in accordance with FIA standard 8855-1999 or higher need not have the seat back attached to the roll structure. The head rest on non-integral seats shall have a minimum area of thirty-six (36) square inches and be padded with a non-resilient material such as Ethafoam® Ensolite® with a minimum thickness of one (1) inch. It is strongly recommended that padding meet SFI spec 45.2 or FIA Sports Car Head Rest Material. The head rest shall be capable of withstanding a force of two-hundred (200) lbs., in a rearward direction. The head rest support shall be such that it continues rearward or upward from the top edge in a way that the driver’s helmet can not hook over the pad.C. Forward braces and portions of the main hoop subject to contact by the driver’s helmet (as seated normally and restrained by seatbelt/shoulder harness) shall be padded with non-resilient material such as Ethafoam® or Ensolite® with a minimum thickness of one-half (1/2) inch. Padding meeting SFI spec 45.1 or FIA 8857-2001 is strongly recommended.D. No portion of the safety roll cage shall have an aerodynamic effect by creating a vertical thrust.E. Roll cage or chassis design shall prevent engine intrusion into the driver compartment.F
. Material:1. Seamless, or DOM (Drawn Over Mandrel) mild steel tubing (SAE 1010, 1020, 1025) or equivalent, or alloy steel tubing (SAE, 4130) shall be used for all roll cage structures. Proof of use of alloy steel is the responsibility of the entrant.2. Minimum tubing sizes (all Formula, Sports Racing, GT, andGCR - 89
Production Category automobiles, and all automobiles registered prior to June 1, 1994) for all required roll cage elements (All dimensions in inches):

Vehicle Weight MaterialWithout Driver Mild Steel Alloy Steel
Up to 1500 lbs. 1.375 x .095 1.375 x .080
1500-2500 lbs. 1.50 x .095 1.375 x .095
Over 2500 lbs. 1.50 x .120 1.50 x .095 1.625 x .120 1.75 x .0953.
Minimum tubing sizes for (all Showroom Stock, Touring and Improved Touring Category auto-mobiles registered after June 1, 1994) for all required roll cage elements (All dimensions in inches):
Up to 1500 lbs. 1.375 x .095 DOM / Seamless / Alloy
1501-2200 lbs. 1.500 x .095 DOM / Seamless / Alloy
2201-3000 lbs. 1.500 x .120 DOM / Seamless / Alloy 1.625 x .120 DOM / Seamless / Alloy 1.750 x .095 DOM / Seamless / Alloy
American Sedans may construct to these specs regardless of weight.)3001-4000 lbs. 1.750 x .120 DOM / Seamless / AlloyOver 4000 lbs. 2.000 x .120 DOM / Seamless / Alloy
ERW tubing is not permitted in any car registered with SCCA after
2003.Main hoop: 4 bends max., totaling 180º ± 10ºFront hoop: 4 bends max. orFront downtubes: 2 bends max.Rear hoop supports: No bends.If any of the above bend requirements cannot be met, all components of the roll cage shall be fabricated from the tubing size(s) listed for the next heavier category of automobiles.4. For purposes of determining tubing sizes, the vehicle weight is as raced without fuel and driver. The minus tolerance for wall thickness should not be less than .010” below the nominal thickness. Improved Touring roll cage tubing size are to be calculated based on the published vehicle weight minus 180 lbs.5. An inspection hole at least 3/16 inch diameter, but no greater than 1/4 inch diameter shall be drilled in a non-critical area of the front and rear hoop as well as the one of the supplemental braces to facilitate verification of wall thickness. Formula Cars and Sports Racers with alternate roll structures are not required to have inspection holes, the wall thickness will be indicated on the back of the homologation certificate.
General Construction1. One (1) continuous length of tubing shall be used for the main hoop member with smooth continuous bends and no evidence of crimping or wall failure. The radius of bends in the roll cage hoop (measured at centerline of tubing) shall not be less thanthree (3) times the diameter of the tubing. Whenever possible, the roll cage hoop should start from the floor of the car, and, in the case of tube frame construction, be attached to the chassis tubes by means of gussets or sheet metal webs with support tubes beneath the joints to distribute the loads. It is recommended that gussets be used.2. Welding shall conform to American Welding Society D1.1:2002, Structural Welding Code, Steel Chapter 10, Tubular Structures. Whenever D1.1 refers to “the Engineer” this shall be interpreted to be the owner of the vehicle. Welds shall be continuous around the entire tubular structure. All welds shall be visually inspected and shall be acceptable if the following conditions are satisfied:a. The weld shall have no cracks.b. Thorough fusion shall exist between weld metal and base metal.c. All craters shall be filled to the cross section of the weld.d. Undercut shall be no more than 0.01 inch deep.3. Aluminum bronze or silicon bronze welding technique is permitted, but extreme care shall be used in preparation of parts before bronze welding and in the design of the attaching joints.
SHOWROOM STOCK ROLL CAGE
Full width roll cages are required in all Showroom Stock automobiles. Roll cages installed in Showroom Stock automobiles are for driver safety and shall be contained entirely within the driver/passenger compartment without removing any panel or accessory not specifically authorized in these rules. The carpet/padding may be cut around the mounting base plates.1. The cage need not be removable. It shall be bolted and/or welded to the car.2. It shall attach to the car at no more than eight (8) points, consisting of the basic cage with six (6) points and two optional braces.3. The forward part of the cage shall be mounted to the floor of the vehicle. In addition, if the two optional braces referred to in item 2, above are utilized they shall be mounted, one on either side, from the forward section of the cage to the firewall or front fender wells (see Section 9.4.2., Figure 8). No braces shall pass through the front firewall.4. Rollcage gussets shall be no thicker than .125”. A maximum of two gussets per rollcage joint are allowed.
Removable roll cages and braces shall be very carefully designed and constructed to be at least as strong as a permanent installation. If one tube fits inside another tube to facilitate removal, the removable portion shall fit tightly and shall bottom by design and at least two (2) bolts shall be used to secure each such joint. The telescope section shall be at least eight (8) inches in length. Minimum boltdiameter is 3/8 inches.C. For tubing sizes for front and main hoop and all required bracing, see 9.4.1.F.3.FIGURE 8D. Main Roll Hoop:1. Main roll hoop (behind the driver) shall extend the full width of the driver/passenger compartment and shall be as near the roof as possible. It shall incorporate a diagonal lateral brace to prevent lateral distortion of the hoop (See Figure 8). Any number of additional reinforcing bars are permitted within the structure of the cage. It is required that the horizontal brace behind the driver’s seat (described in Section 9.4.2.J.) continue from the diagonal to the passenger side main hoop upright or that a second diagonal be installed in the main hoop.E. Front Roll Hoops:1. The front or side hoops shall follow the line of the front pillars to the top of the windshield (as close to the roof as possible) then horizontally to the rear attaching to the main hoop. These two side hoops are to be connected together by a tube over the top of the windshield, or2. A front hoop following the line of the front pillars and connected by horizontal bars to the main hoop on each side at the top may be used, or3. A top “halo” hoop following the roof line from the main hoop to the windshield with forward down tubes following the line of the front pillars to the floor.4. The front or side hoops may extend through the dash pad. This includes the forward part of the door panel if it is an extension of the dash panel.5. One (1) bar is recommended in a horizontal plane between forward cage braces in the dash area.F. Bracing:
The main roll hoop shall have two braces extending to the rear attaching to the frame or chassis. Braces shall be attached as near as possible to the top of the main hoop not more than six (6) inches below the top and at an included angle of at least thirty (30) degrees. On cars where the rear window/bulkhead prohibits the installation of rear braces (e.g., Honda del Sol), the main hoop shall be attached to the body by plates welded to the cage and bolted to the stock shoulder harness mounting points. This installation design must also incorporate a diagonal bar connecting the top of the main hoop to the lower front passenger side mounting point (“Petty Bar”).1. Rear hoop braces may pass through the factory bulkhead or panel separating the driver/passenger compartment from the trunk/cargo area/, fuel tank/fuel cell area, provided the bulkhead is sealed around said cage braces. Metal tape may be used to seal the openings between the bulkhead and the tubes.G. Side Protection:Two (2) side tubes connecting the front and rear hoops across both door openings are mandatory. Door side tubes may extend into the door. NASCAR-style side protection, or one bar bisecting another to form an “X” is permitted. The door window glass, window operating mechanism, inner door trim panel, armrest, map pockets, and inside door latch/lock operating mechanism may be removed and the inner door structural panel may be modified, but not removed to facilitate this type of side protection. The stock side impact beam and the outside door latch/lock operating mechanism shall not be removed or modified.H. Mounting Plates:1. Each mounting plate shall be at least .080 thick if welded and 3/16” thick (with appropriate backing plates) if bolted. There shall be a minimum of three (3) bolts per mounting plate if bolted.2. Each mounting plate shall not be greater than 100 square inches and shall be no greater than twelve (12) inches or less than two (2) inches on a side.3. Whenever possible, mounting plates shall extend onto a vertical section of the structure (such as a rocker box).4. The mounting plate may be multi-angled but must not exceed these dimensions in a flat plane.5. Any number of tubes may attach to the plate or each other.I. Hardware: (Bolts)All hardware shall be Grade 5 or better. 5/16” minimum diameter.J. In order to provide a secure seat back support a section of tubing equal to the roll bar shall be installed horizontally from the main hoop upright to the diagonal brace. This tube shall be no higher than houlder height. The driver’s seat shall be firmly mounted to the structure of the car. In cars where the seat is upright, the back of the seat shall be firmly attached to the main roll hoop, or it’s cross bracing.Seats homologated to and mounted in accordance with FIA standard 8855-1999 or higher need not have the seat back attached to the roll structure. The homologation labels must be visible. Seat supports shall be of the type listed on FIA technical list No.12 (lateral, bottom, etc).FIGURE 9FIA Standard 8855 -1999ABC Seats Ltd.Model: Super Champion 1996Homologation N° CS.OO1.96Date of Manufacture: June 1996Sample FIA seat homologation labelLetters must be at least 8mm high9.4.3. TOURING ROLL CAGEA. All cars registered after 1/1/03 shall conform to these roll cage rules. Effective 1/1/08 all Touring cars shall conform to these roll cage rules. Full width roll cages are required in all Touring automobiles. Roll cages installed in Touring automobiles are for driver safety and shall be contained entirely within the driver/passenger compartment without removing any panel or accessory not specifically authorized in these rules. The carpet/padding may be cut around the mounting base plates.1. The cage shall be welded to the car, and all mandatory tubes shall use welded joint construction.2. It shall attach to the car at no more than eight (8) points, with the forward section of the cage attaching to the front bulkhead or front fender wells (see 9.4.2., Figure 8).3. The front down tubes of the cage shall be mounted to the floor of the vehicle.B. For tubing sizes for front hoop, main hoop, and all required bracing, see Section 9.4.1.F.3. It is recommended that gussets (flat steel, tubing, etc.) be utilized to strengthen the joints of all required cage elements.C. Main Roll Hoop:1. Main roll hoop (behind the driver) shall extend the full width of the driver/passenger compartment and shall be as near the roof as possible. It shall incorporate a diagonal lateral brace to prevent lateral distortion of the hoop (See Figure 8). Any number of additional tubes/braces are permitted within the structure of the cage. It is required that the horizontal brace behind the driver’s seat (described in Section 9.4.2.J.) continue from the diagonal to the passenger side main hoop upright or that a second diagonal be installed in the main hoop.D. Front Roll Hoops:1. The front or side hoops shall follow the line of the front pillars to the top of the windshield (as close to the roof as possible) then horizontally to the rear attaching to the main hoop. Thesetwo side hoops are to be connected together by a tube over the top of the windshield, or2. A front hoop following the line of the front pillars and connected by horizontal bars to the main hoop on each side at the top may be used, or3. A top “halo” hoop following the roofline from the main hoop to the windshield with forward down tubes following the line of the front pillars to the floor.4. The front or side hoops may extend through the dash pad. This includes the forward part of the door panel if it is an extension of the dash panel.5. One (1) bar is required in a horizontal plane between forward cage braces in the dash area.E. Bracing: The main roll hoop shall have two braces extending to the rear attaching to the frame or chassis. Braces shall be attached as near as possible to the top of the main hoop but, not more than six (6) inches below the top and at an included angle of at least thirty (30) degrees. On cars where the rear window/bulkhead prohibits the installation of rear braces (e.g., Honda del Sol), the main hoop shall be attached to the body by plates welded to the cage and bolted to the stock shoulder harness mounting points. This installation design must also incorporate a diagonal bar connecting the top of the main hoop to the lower front passenger side mounting point (“Petty Bar”).1. Rear hoop braces may pass through the factory bulkhead or panel separating the driver/passenger compartment from the trunk/cargo area/, fuel tank/fuel cell area, provided the bulkhead is sealed around said cage braces. Metal tape may be used to seal the openings between the bulkhead and the tubes.F. Side Protection:Two side protection tubes (door bars) are mandatory on each side of the car. NASCAR-style side protection is required on the driver’s side and is optional on the passenger side. The driver’s window safety net may be mounted to this side protection and the top cage tube. NASCAR-style side protection tubes shall extend into the door. The door window glass, window operating mechanism, inner door trim panel, armrest, map pockets, and inside door latch/lock operating mechanism may be removed only if it interfered with the installation of NASCAR-style side protection tubes. The inner door structural panel may be modified, but not removed to facilitate this type of side protection. The stock side impact beam and the outside door latch/lock operating mechanism shall not be removed or modified.G. Mounting Plates:1. Each mounting plate shall be at least .080 thick.2. Each mounting plate shall not be greater than 100 square inches and shall be no greater than twelve (12) inches or less than two (2) inches on a side.3. Whenever possible, mounting plates shall extend onto a vertical section of the structure (such as a rocker box).
4. The mounting plate may be multi-angled but must not exceed these dimensions in a flat plane.5. Any number of tubes may attach to the plate or each other.H. The driver’s seat shall be firmly mounted to the structure of the car. In cars where the seat is upright the back of the seat shall be firmly attached to the main roll hoop, or it’s cross bracing, so as to provide aft and lateral support. Seats homologated to and mounted in accordance with FIA standard 8855-1999 or higher need not have the seat back attached to the roll structure. The homologation labels must be visible. Seat supports shall be of the type listed on FIA technical list No.12 (lateral, bottom, etc).

9.4.4. GT ROLL CAGEAll GT automobiles shall have full width roll cages. Open automobiles without full windshields may have a low front hoop. All closed automobiles shall have full height (top of windshield) front hoops.A. Main and Front Hoops1. Main Hoop:The main hoop (behind the driver) shall be full width of the cockpit. The main hoop shall be as near to the roof as possible on closed automobiles and not less than two (2) inches above the driver’s helmet on open automobiles, with the driver seated normally and restrained by seat belt/shoulder harness. Low front hoops shall be cowl height, or at a minimum, a straight line drawn from the top of the main hoop to the top of the front hoop shall pass over the driver’s helmet.2. Front Hoop:a. The front hoop shall follow the line of the front pillars to the top of the windshield and be connected, by horizontal bars, to the top of the main hoop on each side (as close to the roof as possible).b. Two (2) side hoops following the line of the front pillars to the top of the main hoop may be used. These two (2) side hoops are to be connected by a horizontal bar over the top of the windshield. (See Figure 10), orc. A top “halo” hoop following the roof line from the main hoop to the windshield with forward down tubes following the line of the front pillars to the floor.d. Double “ear-type” joints are allowed, provided that they are fully welded at all mating surfaces.3. Fabrication:The main hoop shall be one continuous length of tubing with smooth continuous bends with no evidence of crimping or wall failure. The minimum radius for all bends shall be three (3) times the tube diameter measured from the tube centerline. Whenever possible, the roll hoops should start from the floor of the automobile, and, in the case of tube frame construction, be attached to the tubes by means of gussets or metal webs in order to distribute the loads. On automobiles of frameless construction, consideration should be given to using a vertical roll hoop of 360 degrees completely around the inside of the automobile and attached with suitable mounting plates.FIGURE 10: Recommended Roll CageHigh Front Hoop Open and ClosedB. BracingAll required bracing shall be the same diameter and wall thickness as listed in 9.4.1.F, Material. (Main and Front Hoops)All main hoops shall incorporate a diagonal brace (same diameter and wall thickness as main hoop) to prevent lateral distortion of the main hoop.1. Main Hoop Bracing:Main hoops shall have two (2) braces extending to the rear, attaching to the frame or chassis. Braces shall be attached as near as possible to the top of the main hoop (not more than six (6) inches below the top) and at an included angle of at least thirty (30) degrees. Open cars with a low front hoop shall have (Effective 1/1/99) two braces extending from the main hoop to the low front hoop. These braces shall be mounted no lower than six inches below the top of the main hoop as illustrated in Figure 11.FIGURE 11 Minimum Requirements for Roll Cages
2. Front Hoop Bracing:There shall be two (2) braces extending forward from the front hoop to protect the driver’s legs. It is recommended that this bracing extend to the bulkhead in front of the driver’s feet; but, in any case, it shall be integrated into the frame or chassis to provide substantial support for the front hoop.C. Side Protection - Open and Closed Automobiles1. The minimum side protection shall consist of a side tube connecting the front and rear hoops across both the door openings. Additionally, there shall also be either a diagonal tube from the front hoop to the rear hoop bisecting the door opening below the horizontal side tube, or not less than two (2) horizontal side tubes. Additional tubing may be added. NASCAR-style door bars are recommended.2. In automobiles with full roll cage installations including side bars, interior door panels may be altered, replaced, or removed. When door panels are removed, all sharp edges or projections shall be protected.D. Mounting Plates:The thickness of mounting plates bolted to the structure of the car shall not be less than the thickness of the roll hoop or brace that they attach and shall be backed-up with a plate of equal dimensions on the opposite side of the panel, with the plates through-bolted together. A minimum of three (3) bolts per mounting plate is required for bolted mounting plates. All hardware (bolts) shall be Grade 5 or better with 5/16” diameter minimum. Mounting plates welded to the structure of the car shall not be less than .080” thick. Whenever possible the mounting plates should extend onto a vertical section of the structure (such as door pillar).E. Driver’s SeatThe driver’s seat shall be firmly mounted to the structure of the car. In cars where the seat is upright, the back of the seat shall be firmly attached to the main roll hoop, or it’s cross bracing. Bulkheads, firewalls, rear decks, or similar structures of suitable strength may be used as a substitute for the main roll hoop or cross bracing to provide the required seat back support.Seats homologated to and mounted in accordance with FIA standard 8855-1999 or higher need not have the seat back attached to the roll structure. The homologation labels must be visible, see Fig. 9. Seat

9.4.6. PRODUCTION ROLL CAGEAll automobiles shall have full width roll cages. Roll cages may be of two (2) designs, low front hoop or high front hoop. Specific installations are subject to approval by the Technical and Safety Inspectors at each event. The Technical Staff of Club Racing, with the concurrence of the Club Racing Board, shall have the responsibility to ensure specification compliance with SCCA safety standards. Alternate structures which do not meet the following criteria will not be considered unless they are eligible under Section 9.4.6.B.2. Cars that are not in compliance with these roll cage requirements but were issued logbook “gold cards” or “gold seals” by the National Office prior to 1/1/05 may continue to use their existing roll cages until 1/1/10. The gold card or gold seal must accompany the vehicle logbook.A. Main HoopFor all cars, the main hoop (behind the driver) shall be full width of the cockpit.1. Closed Automobiles:The main hoop shall be as near to the roof as possible on closed automobiles2. Open top Automobiles:a. The main hoop shall be not less than two (2) inches above the driver’s helmet on open automobiles, with the driver seated normally and restrained by seat belt/shoulder
harness as illustrated in Figure 11. b. Open top automobiles without a windshield may use an asymmetric main hoop provided:i. The main hoop shall be full height (over the driver) for at least 50% of the width of the hoop as illustrated in Figure 11.ii. On the passenger side of the car, the hoop shall be at least as high as the top of the rear corner of the door as illustrated in Figure 11.iii. All cars must have correct shape main hoop by 1/1/2007 except those cars issud a gold card or gold seal.B. Front HoopFor all cars, the front hoop shall be full width of the cockpit.1. Closed Automobiles and open top automobiles with a windshield:a. The front hoop shall follow the line of the front pillars to the top of the windshield and be connected, by horizontal bars, to the top of the main hoop.b. Instead of a single front hoop, two (2) side hoops following the line of the front pillars to the top of the main hoop may be used. These two (2) side hoops are to be connected by a horizontal bar over the top of the windshield. (See Figure 9)c. Another option is a top “halo” hoop following the roof line from the main hoop to the windshield with forward down tubes following the line of the front pillars to the floor.d. Double “ear-type” joints are allowed, provided that they are fully welded at all mating surfaces.e. It is recommended the hoop extend to the belly pan. If not, it shall be attached to the chassis with gussets and triangulation in order to spread the loads.f. It is recommended that the vertical bars of the front hoop be connected by a horizontal bar at a point above the driver’s legsg. All front hoop options (a, b, c) shall be connected to the main hoop in the following manner.i. On open top cars, attachments shall be no more than six inches below the top of the main hoop.ii. On closed top cars, attachments shall be as close to the roof as possible.2. Open top Automobiles without a windshield and with a high front hoop design.Front hoop requirements for open top automobiles with a windshield are to be followed with the following exceptions.a. Since the windshield frame is to be removed with the windshield, there is no requirement to follow the line of the A-pillar.b. Since there is no windshield for the hoop to be above, the front hoop shall be above the driver’s line of sight.3. Open top Automobiles without a windshield and with a low front hoop designa. Low front hoops shall be cowl height, or at a minimum, a straight line drawn from the top of the main hoop to the top of the front hoop shall pass over the driver’s helmet (See figure 11).b. Open cars with a low front hoop shall have two braces extending from the main hoop to the low front hoop. These braces shall be mounted no lower than six inches below the top of the main and front hoops as illustrated in Figure 11.c. Fabrication - Open and Closed Automobiles The main hoop shall be one continuous length of tubing with smooth continuous bends and no evidence of crimping or wall failure. The minimum radius for all bends shall be three (3) times the tube diameter measured from the tube centerline. Whenever possible, the roll hoops should start from the floor of the automobile, and, in the case of tube frame construction, be attached to the tubes by means of gussets or metal webs in order to distribute the loads. On automobiles of frameless or uni-body construction, consideration should be given to using a vertical roll hoop of 360 degrees completely around the inside of the automobile and attached with suitable mounting plates.FIGURE 12: Recommended Roll CageOpen Top Cars with a Low Front HoopC. Bracing - Open and Closed AutomobilesAll required bracing shall be the same diameter and wall thickness as listed in 9.4.1.F.., Material. (Main and Front Hoops)All main hoops shall incorporate a diagonal brace (same diameter and wall thickness as main hoop) to prevent lateral distortion of the main hoop. The brace shall either be in the plane of the main hoop or extend from the top of one rear brace (see Figure 13) to the bottom of the opposite brace. In the case of braces in the plane of the main hoop, the brace must be attached at both ends to the main hoop, span at least 50% of the main hoop, and at least 75% of the height of the main hoop.FIGURE 13Diagonal brace may run B-C, A-D, A-F, or B-E.1. Main Hoop BracingMain hoops shall have two (2) braces extending to the rear, attaching to the frame or chassis. Braces shall be attached as near as possible to the top of the main hoop (not more than six (6) inches below the top) and at an included angle of at least thirty (30) degrees. Rear braces may penetrate required bodywork provided the resulting hole serves no other function, and the holes are sealed around the braces.2. Removable BracingRemovable bracing shall incorporate connectors of the double lug, tapered, or muff-type as shown in Figures 14, 15, and 16. The double-lug type shall include a doubler, gusset, or capping arrangement so 3. Front Hoop BracingThere shall be two (2) braces extending forward from the front hoop to brace the front hoop and protect the driver’s legs. It is recommended that this bracing extend to the bulkhead in front of the driver’s feet; but, in any case, it shall be integrated into the frame or chassis to provide substantial support for the front hoop. Front braces may penetrate required bodywork provided the resulting hole serves no other function, and the holes are sealed around the braces.D. ExceptionsWhen it is manifestly impractical or unsafe to construct and install a roll structure meeting the minimum requirements as set forth above, an alternate design roll structure may be submitted to the SCCA Technical Staff who may, in a proper case, accept such alternate roll structure design on a specific case by case basis.E. Side Protection - Open and Closed Automobiles1. The minimum side protection shall consist of a horizontal side tube connecting the front and rear hoops across both the door openings. Additionally, there shall also be either a diagonal tube from the front hoop to the rear hoop bisecting the door opening below the horizontal side tube, or not less than two (2) horizontal side tubes. Additional tubing may be added. NASCAR-style door bars are recommended.2. In automobiles with full roll cage installations including side bars, interior door panels may be altered, replaced, or removed. When door panels are removed, all sharp edges or projections shall be protected.
1. Bolt In cages.The thickness of mounting plates bolted to the structure of the car shall not be less than the thickness of the roll hoop or brace that they attach and shall be backed-up with a plate of equal dimensions on the opposite side of the panel, with the plates through-bolted together. A minimum of three (3) bolts per mounting plate is required for bolted mounting plates. All hardware (bolts) shall be Grade 5 or better with 5/16” diameter minimum.2. Welded in cages.Mounting plates welded to the structure of the car shall not be less than .080” thick. Whenever possible the mounting plates should extend onto a vertical section of the structure (such as door pillar).