freeridemxatv
paging dr. faggot
Just the main hoops of the car must be 095 and also if you read the rules, youre SUPPOSED to build your car with a A hoop and a B hoop...
A hoop and B hoop?
Just the main hoops of the car must be 095 and also if you read the rules, youre SUPPOSED to build your car with a A hoop and a B hoop...
A hoop and B hoop?
ROLLCAGES:
Required:
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 nonferrous
materials are permitted.
Material :
Rollcage construction material may be crew, dom, whr, wcr mild carbon steel or 4130 chromoly.
UTVRA HIGHLY RECOMMENDS THE USE OF 4130 CROMOLY or 1018/1012/ASTM/DOM.
All welds must be of high quality and craftsmanship with good penetration and with no undercutting
of parent material. Stress relieve all welded intersections by flame annealing.
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.
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.
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 cornertubing,
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.
Restricted:4130 chromoly is highly recommended for all rollcage construction.
Oxy-acetylene brazing on rollcage is strictly forbidden.
Recommended:
alot rules in BITD, think rule book last time I looked about 30 pages...safety safety. By far the best rule book I have seen for UTV's
seats are one of the very first things you should have to set it up correctly. call a local vendor and see if you can borrow a seat for mock up.
you should have seats, fuel cell, suspension, and drivetrain in hand before starting a big project like that. it will make fabrication much easier.