Section 28(35) in Technical Specifications of HVAC Ordinary Bus

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State of Punjab - Subsection

Section 28(35) in Technical Specifications of HVAC Ordinary Bus

35.0Bus dimensions.- The bus shall be with wheel base of 6100 mm to 6500 mm (with ramp over angle from 4.8 deg. to 5.1 deg.) with the front and rear overhang shall not exceed than as specified in MVA/CMVR. The total length of the bus shall be max. 12 metres (1200 mm) with minus tolerance of 100 mm. The total width of the bus shall be 2600 with minus tolerance of 30 mm. The overall height of the bus shall be maximum 3800 mm. The approach and departure angles shall not be less than 9 degree each in unladen condition. The approach angle is the angle measured between a line tangent to the front tyre static loaded radius arc and the initial point of structural interference forward of the front type to the ground. The departure angle is the angle measured between a line tangent to the rear tyre static loaded radius are and the initial point of structural interference rearward of the rear tyre to the ground. The turning circle radius shall be as per IS 9435-1980 (or latest) the ground clearance within the wheelbase shall not less than 270 mm. The Axle clearance shall not be less than 191 mm. Axle zone clearance is projected area between the tyres and wheels on the same axial centerline- The wheel area cleareance shall not be less than 254 mm for parts fixed to the bus body and 203 mm for the parts that move vertically with Axles. Ramp over angle required for clearing ramp height of 270 mm shall be 4.8 to 5.1 as given below:

Sr. No.	Wheel base (mm)	Ramp over angle (degrees)
1	6100	5.1
2	6300	4.9
3	6500	4.8

Note. - Ramp over angle is defined as tangent inverse of 270 mm divided by half of the wheelbase.

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State of Punjab - Subsection

Section 28(35) in Technical Specifications of HVAC Ordinary Bus