Only Thing Fieros Are Good For...
06-06-2003, 12:24 AM
#42
Senior Member
Thread Starter
Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
Originally Posted by MazdaEnthused' date='Jun 5 2003, 10:01 PM
wow now we into roll cages
Well It kind of on a budget as if you couldn't tell banzai, so could we reinforce it more? Like a couple more angles in there?
06-06-2003, 09:04 AM
#46
Super Moderator
Join Date: Jul 2002
Location: My BIG ol TURBO-DIESEL
Posts: 5,181
Your best and safest bet is to buy a 4 point rollbar from JEGS for about $120.00 and add to it from there
vehicle safety equipment
SCR34: Rollcages
All vehicles in competition must be equipped with a rollcage based on seamless mild steel. Minimum design and tubing size for rollcage structure is in accordance with Table 2.
Table 2. Minimum Tubing Dimension
Vehicle Weight
Open Cockpit
Closed Cockpit
Under 2000 lbs.
1.5" x 0.90"
1.5" x .090"
2000 to 2999 lbs.
1.75" x .120"
1.5" x .120"
3000 to 3999 lbs.
2" x .120"
1.75" x .120"
4000 pounds and over
2.25" x .120"
2” x .120"
Note: See manufacturer’s’ reference charts for alloy steel tubing equivalent strengths. No aluminum or other non-ferrous materials are permitted.
Definition
Open cockpit is a vehicle whose rollcage is open to the outside and the main structure of the passenger compartment with body panels attached to it.
Closed cockpit is a vehicle that has a manufacturer's stock steel passenger compartment with a rollcage installed in the interior of the passenger compartment.
Material
Rollcage construction material may be crew, dom, whr, wcr mild carbon steel or 4130 chromoly. 4130 chromoly is highly recommended for all rollcage construction. Stress relieve all welded intersections by flame annealing. All welds must be of high quality and craftsmanship with good penetration and with no undercutting of parent material. Oxy-acetylene brazing on rollcage is strictly forbidden.
Rollcage Design
All rollcages must be designed and constructed with one front vertical hoop, one rear vertical hoop, two interconnecting top bars, two rear down braces, one diagonal brace and all necessary gussets. The two top interconnecting bars must be placed as far to the outside of the top part of the front and rear hoops as possible. Rear down braces and diagonal brace must angle a minimum of 30 degrees from vertical. Opened-wheeled vehicles built only wide enough for a single seat are excluded from having the diagonal brace (although the diagonal brace is highly recommended for the single seat vehicles). At the bottom of the diagonal brace there must be a cross member of the same tubing material and dimensions as the hoop. All rollcage components (hoops, braces, gussets, etc.) must have a minimum of 3-inch clearance from the component to the vehicle occupant’s helmets when occupants are seated in their normal riding positions. All portions of the roll bar or bracing that might come into contact with the vehicle occupant’s helmets must be padded. All portions of the roll bar or bracing that might come into contact with the vehicle occupant’s helmets must be padded.
Rollcages must be securely mounted to the frame or body. All intersecting points must be gusseted and braced. Cab or body mounted rollcages must be bolted through the body structure and be attached by use of a minimum two 0.1875-inch thick doubler plates (one on each side of body structure). Bolts and nuts must be at least 0.375-inch-diameter s.a.e. Grade 8 or equivalent aircraft quality. Welding of cab or body mounted rollcages to body structure is strictly prohibited. Rollcage terminal ends must be attached to a frame or body member that will support maximum impact and not shear or allow more than 1.5 inches of movement in the cage terminal end.
All vehicles including those with stock steel doors must have at least one side bar on each side of vehicle that will protect occupants from side impact. The side bars must be of the same tubing material and dimensions as the rest of the rollcage. The side bars must be as close to parallel to the ground as possible, be located to provide maximum protection to the occupants, and be securely welded to the front and rear hoops. The location of the sidebars must not cause difficulty in entering or exiting the vehicle.
Gussets constructed of 0.125-inch x 3-inch x 3-inch flat-plate or split, formed and welded corner-tubing, or tubing-gussets made of the same material and thickness as the rollcage may be used. Gussets must be installed at all major intersections, including diagonal and rear down braces, where single weld fractures can affect occupants’ safety.
vehicle safety equipment
SCR34: Rollcages
All vehicles in competition must be equipped with a rollcage based on seamless mild steel. Minimum design and tubing size for rollcage structure is in accordance with Table 2.
Table 2. Minimum Tubing Dimension
Vehicle Weight
Open Cockpit
Closed Cockpit
Under 2000 lbs.
1.5" x 0.90"
1.5" x .090"
2000 to 2999 lbs.
1.75" x .120"
1.5" x .120"
3000 to 3999 lbs.
2" x .120"
1.75" x .120"
4000 pounds and over
2.25" x .120"
2” x .120"
Note: See manufacturer’s’ reference charts for alloy steel tubing equivalent strengths. No aluminum or other non-ferrous materials are permitted.
Definition
Open cockpit is a vehicle whose rollcage is open to the outside and the main structure of the passenger compartment with body panels attached to it.
Closed cockpit is a vehicle that has a manufacturer's stock steel passenger compartment with a rollcage installed in the interior of the passenger compartment.
Material
Rollcage construction material may be crew, dom, whr, wcr mild carbon steel or 4130 chromoly. 4130 chromoly is highly recommended for all rollcage construction. Stress relieve all welded intersections by flame annealing. All welds must be of high quality and craftsmanship with good penetration and with no undercutting of parent material. Oxy-acetylene brazing on rollcage is strictly forbidden.
Rollcage Design
All rollcages must be designed and constructed with one front vertical hoop, one rear vertical hoop, two interconnecting top bars, two rear down braces, one diagonal brace and all necessary gussets. The two top interconnecting bars must be placed as far to the outside of the top part of the front and rear hoops as possible. Rear down braces and diagonal brace must angle a minimum of 30 degrees from vertical. Opened-wheeled vehicles built only wide enough for a single seat are excluded from having the diagonal brace (although the diagonal brace is highly recommended for the single seat vehicles). At the bottom of the diagonal brace there must be a cross member of the same tubing material and dimensions as the hoop. All rollcage components (hoops, braces, gussets, etc.) must have a minimum of 3-inch clearance from the component to the vehicle occupant’s helmets when occupants are seated in their normal riding positions. All portions of the roll bar or bracing that might come into contact with the vehicle occupant’s helmets must be padded. All portions of the roll bar or bracing that might come into contact with the vehicle occupant’s helmets must be padded.
Rollcages must be securely mounted to the frame or body. All intersecting points must be gusseted and braced. Cab or body mounted rollcages must be bolted through the body structure and be attached by use of a minimum two 0.1875-inch thick doubler plates (one on each side of body structure). Bolts and nuts must be at least 0.375-inch-diameter s.a.e. Grade 8 or equivalent aircraft quality. Welding of cab or body mounted rollcages to body structure is strictly prohibited. Rollcage terminal ends must be attached to a frame or body member that will support maximum impact and not shear or allow more than 1.5 inches of movement in the cage terminal end.
All vehicles including those with stock steel doors must have at least one side bar on each side of vehicle that will protect occupants from side impact. The side bars must be of the same tubing material and dimensions as the rest of the rollcage. The side bars must be as close to parallel to the ground as possible, be located to provide maximum protection to the occupants, and be securely welded to the front and rear hoops. The location of the sidebars must not cause difficulty in entering or exiting the vehicle.
Gussets constructed of 0.125-inch x 3-inch x 3-inch flat-plate or split, formed and welded corner-tubing, or tubing-gussets made of the same material and thickness as the rollcage may be used. Gussets must be installed at all major intersections, including diagonal and rear down braces, where single weld fractures can affect occupants’ safety.
06-06-2003, 10:42 PM
#48
Senior Member
Join Date: Apr 2002
Location: IL
Posts: 2,930
you've also compromised the structure of the fiero greatly by removing the top and B pillar /door jamb area which is a key structural component.... you better get that roll cage fixed up or you're gong to have to add alot of additional bracing underneath to keep it open top....