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I.Operating spaceU.K.+E.U.

l.1.‘Operating space’ means the minimum volume of space between any fixed parts of the structure which is available to the driver of the tractor to enable him to operate the tractor from his seat in any way required with complete safety.U.K.+E.U.

‘Seat reference point’ means the reference point determined by the method described in Appendix 1.

‘Reference plane’ means the plane parallel to the median longitudinal plane of the tractor passing through the seat reference point.

I.2.The width of the operating space must be at least 900 mm, from 400 to 900 mm above the reference point and over a length of 450 mm forward of this point (see Figures 2 and 3).U.K.+E.U.

I.3.Vehicle parts and accessories must not hamper the driver when driving the tractor.U.K.+E.U.

I.4.For all positions of the steering column and the steering wheel [F1with the exception of those intended solely for entry and exit], the clearance between the base of the steering wheel and the fixed parts of the tractor must be at least 50 mm; in all other directions this clearance must be at least 80 mm from the rim of the steering wheel, as measured from outside the area occupied by the steering wheel (see Figure 2).U.K.+E.U.

I.5.The rear wall of the cab from 300 to 900 mm above the seat reference point must be a minimum of 150 mm behind a vertical plane which is perpendicular to the reference plane and passes through the reference point (see Figures 2 and 3).U.K.+E.U.

This wall must have a width of at least 300 mm on either side of the seat reference plane (see Figure 3).

I.6.The manual controls must be located in relation to one another and to the other parts of the tractor so that no danger of injury to the operator's hands arises from their operation.U.K.+E.U.

Where the force required to operate a control exceeds 150 N, a clearance of 50 mm will be considered adequate and where the force is between 80 N and 150 N, a clearance of 25 mm will suffice. Any clearance will be accepted in relation to controls where the operating force required is less than 80 N (see Figure 3).

Alternative locations for the controls which achieve equally satisfactory safety standards are acceptable.

I.7.No [F1rigid] point on the roof must be less than 1 050 mm from the seat reference point in a section situated forward of a vertical plane passing through the reference point and perpendicular to the reference plane (see Figure 2). [F1The padding may extend downwards to 1 000 mm above the seat reference point.] U.K.+E.U.

[F11.8. The radius of curvature of the surface between the rear panel of the cab and the roof of the cab may extend up to a maximum of 150 mm.] U.K.+E.U.