Semi-Trailer Truck - 40' WB

The turning path of a Medium-sized Semi Truck measures the minimum possible turning radius necessary for performing a u-turn in a vehicle with a 40’ (12.2 m) wheelbase.

Measuring the inner and outer radii of the 180° turn, a minimum inner radius of 19’4” (5.9 m) and minimum outer radius between 40’-40’10” (12.2-12.4 m) should be provided for medium-sized semi trucks.

What is the minimum inside turning radius required for a medium-sized semi truck?
A minimum inner turning radius of 19’4” | 5.9 m should be provided for a medium-sized semi truck (40’ | 12.2 m wheelbase) making a 180° turn.
What is the minimum outside turning radius required for a medium-sized semi truck making a 180° turn?
The outer turning radius necessary for a medium-sized semi truck making a a 180° turn should be between at least 40’-40’10” | 12.2-12.4 m.
How big is a medium-sized semi truck?
Medium-sized semi trucks have wheelbases of 40’ | 12.2 m, typical lengths of around 45’6” | 13.87 m, and overall widths of 8’ | 2.44 m.
Semi-Trailer Truck - 40' WB

Details

*Under Development*

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Outer Radius: 40’-40’10” | 12.2-12.4 m
Inner Radius: 19’4” | 5.9 m

Vehicle Wheelbase: 40’ | 12.2 m
Vehicle Length: 45’6” | 13.87 m
Vehicle Width: 8’ | 2.44 m

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Drawings include:
Semi-Trailer Truck (40' Wheelbase) Turning Paths plan

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The turning radius, or turning path, of a vehicle is the smallest circular turn that it can make. Measuring the diameters of the inner and outer turning circles, turning paths of vehicles are calculated as standards used when designing roads, parking layouts, loading, and public service areas.

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