Bus Body Construction and Regulations

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Bus body construction and regulations

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1. Entrance doorway skirt panel 2. Skirt panel front of front N/S wheel arch 3. Skirt panel rear of front N/S wheel arch 4. N/S main side panel Bay1. 5. Air filter access cap. 6. N/S main side panel Bay2. 7. Skirt panel. 8. Spare wheel access flap. 9. N/S main side panel Bay3. 10. Skirt panel front of rear N/S wheel arch. 11. N/S main side panel Bay4.

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12. Rear skirt panel, N/S. 13. N/S main side panel , Bay 5. 14. Pillar capping between Bay1 & entrance door. 15. Pillar capping main pillars. 16. Roof panel Bay1. 17. Roof panel Bay 2. 18. Roof panel Bay 3. 19. Roof panel Bay 4. 20. Valance panel for spare wheel access flap. 21. Valance panel. 22. Valance panel for air filter access flap. 23. Front skirt panel O/S. 24. Main side panel below drivers signaling window.

O/S.

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25. O/S main side panel Bay 1. 26. Skirt panel rear of front O/S wheel arch. 27. O/S brake gear access flap. 28. Valance panel for O/S brake gear access flap. 29. Valance panel. 30. O/S main side panel Bay 2. 31. Skirt panel front of rear O/S wheel arch. 32. O/S main side panel Bay 3. 33. O/S rear skirt panel. 34. O/S main side panel Bay 4. 35. Main side panel below emergency door.

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36. Emergency door main side panel. 37. Pillar capping between emergency door and

Bay 4. 38. Emergency door, top rail capping. 39. Emergency door, shut pillar capping. 40. Emergency door, hinge pillar capping. 41. Water bottle flap. 42. Fuel filter flap. 43. Header tank flap. 44. Electrical flap. 45. N/S rear pillar capping. 46. O/S No 1 pillar capping.

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Cant rails are structural members that connect two body sections above the window section.

Waist Rails are structural members that connect two body sections below the window section.

Seat Rails are structural members running along the lateral walls and provide support for seat mounting.

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Bus body Regulations

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Number of Service Doors

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Minimum dimensions of Service Doors

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Window

The window panes shall be of sliding type for all buses except ACX buses.

However, in ACX buses the provision for adequate ventilation in case of A.C. failure shall be made.

The minimum width of the window aperture (clear vision zone) shall be 550 mm.

The minimum height of the sliding part of the window aperture (clear vision zone) shall be 550 mm

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Emergency Exits

At least one emergency exit shall be situated on the opposite side of the service door.

In case of more than one emergency exit, one of the emergency exit shall be situated in the front half of the vehicle, opposite to the service door and the second emergency exit shall be either on the rear half or at the rear side of the bus.

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Minimum dimensions of the emergency exits

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Step

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Depth of Seat Cushion

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Seat base and back thickness

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Sequence of Bus building operation

Chassis Preparation Side and front framing Roof framing and rear end Truss panel riveted General inspection Roof panels Paneling and moulding final finish

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Chassis Preparation:

The floor frame is placed in position, holding down bolds fixed and all parts of the chassis painted.

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Side and front framing

The body side framing and front end is assembled. Truss panels bolted into position, the body lined up with the waist rail and the lower bolts tightened.

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Roof framing and rear end

The body ends and roof framing are positioned and fixed, the wheel boxes and entrance steps installed.

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Truss panel riveted

Truss panels between the waist rail and seat rail over the wheel arches are riveted into position.

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General inspection

General inspection of finished framing to ensure all structural bolts are tight and truss panels securely riveted

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Roof panels

Roof panels are fixed and riveted.

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Paneling and moulding

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Flooring and interior lining panels fixed and rived into position.

Side windows are riveted, Windscreen fixed, inside ceiling panels, Mouldings, pillar cappings and electric light fittings fixed.

Tubular seat frames are positioned and bolted through the floor and seat rail. Extra floor covering and treads fixed, stanchions and grab handles are fitted.

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Final Finish

Final finishing and inspection.

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