Page 184

T12-1-5

Floorboards 3mm plate minimum metal floorboards must be fixed to extend from beneath the rear of the driver's seat to the fire wall,. and must contain driverâ€&#x;s feet within the foot well. If the floor is not under the gearbox then gearbox must have a securely fastened metal cover. T12-1-6 Roll Bars (a) Rollcage material minimum size = 48mm OD x 3.2 mm wall thickness medium black pipe or 40mm x 40mm x 3mm RHS. (b) Rollcage brace material minimum size = 42mm OD x 3.2mm wall thickness medium black pipe or 40mm x 40mm x 3mm RHS. (c) Galvanised pipe is not permitted in rollcage. (d) A substantial interior rollcage structure must be fitted from above the driver's normal seated position to below the driver's feet. Where the rollcage is welded to the primary chassis structure the chassis structure becomes an integral part of the rollcage. (e) Where the driver's feet extend lower than the primary chassis, the rollcage material must extend to below the driver's feet to form a rectangle for attachment of a driver's floor. The driver's floor below the normal position for his feet shall be 3mm steel welded on 4 sides to the lower rollcage rectangle.

(f)

The rear of the rollcage structure must be securely braced at roof level to the chassis at the rear of the car and further secured by a diagonal cross brace, straight in section. (g) The rear roll bar must be a minimum internal width of 762mm measured at the driver's shoulder height. The vertical part of the rear roll bar must be as straight as possible and may have up to a maximum front to rear lay back of 200mm. (h) In addition to (g), the minimum internal measurement, from the centre of the back of the driver's seat to the inside of the roll cage, must be a minimum of 381mm, measured at the driver's shoulder height. (i) All roll bars and braces must be securely welded to each other, no bolt together sections are permitted. The construction must be smooth and even without ripples or cracks. (j) If the fuel tank is mounted at the rear of the vehicle, and is exposed between the two rear facing braces, there must be an additional horizontal brace (of minimum rollcage brace material), at tank level between the two rear facing braces.

2010 ELECTRONIC RULEBOOK

184

2010 NZ Speedway Rule Book  
2010 NZ Speedway Rule Book  

2010 NZ Speedway Rule Book

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