Browse Standards J WIP Motor Vehicle Dimensions J This SAE Recommended Practice defines a set of measurements and standard procedures for motor vehicle dimensions. The dimensions are primarily intended to measure the design intent of a vehicle within a design environment i. All dimensions in this practice can be measured this way.
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In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. Scope —This SAE Recommended Practice defines a uniform set of interior and exterior dimensions for passenger cars, multipurpose passenger vehicles, and trucks. Unless otherwise indicated, the latest revision of SAE publications shall apply.
The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user. SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled.
SAE invites your written comments and suggestions. GVWR is the value specified by the vehicle manufacturer as the loaded weight of a single vehicle. These Vehicle Weights are established to enable uniform static comparisons of dimensions affected by the ground plane and vehicle pitch attitude.
For heavy trucks, the weight does not include engine fuel. X, Y, Z coordinates are dimensioned to their respective planes. See Figure 1. These are holes, surfaces, marks, or indentations on the vehicle body as described by the manufacturer. Their location is specified in the three-dimensional reference system by X, Y, Z coordinates and to ground with the vehicle at a specified Vehicle Weight. If the designated seating position can be adjusted, the path of the Design H-Point through the full seat adjustment establishes the Design H-Point travel path, and can be dimensionally described by coordinates relative to the three-dimensional reference system.
See Section See Figure 2. See Figure 3. For vehicles with SgRP to heel vertical H30 greater than mm, the accelerator pedal may be depressed as specified by the manufacturer. If the depressed pedal is used, the foot must be flat on the accelerator pedal. The lateral Y coordinate location for the Ball of Foot is mid-width on the shoe at the side view Ball of Foot location.
The Torso Line is parallel to the straight flat portion of the lower back on the torso and is used to facilitate the definition of torso angle. The dash panel is usually the vertical extension of the toe panel. Opaque coatings, reveal or garnish moldings adjoining the interior glazing surface are projected horizontally to the interior glazing surface, then normal and outward to the exterior glazing surface.
Exterior components are projected horizontally to the exterior glazing surface see Figure 3. Cushion Line is used to facilitate the definition of Cushion Angle which reflects the attitude that the Seat Cushion imposes on the seated occupant's thighs. See SAE J General —The dimensions in this report will enable the measurement of a vehicle as designed.
All dimensions are defined normal to the three-dimensional reference system, described in SAE J except for ground-related dimensions which are defined normal to ground with the vehicle loaded to a design load weight, unless defined in the dimension definition. All dimensions are measured to the base vehicle and do not include Regular Production Options RPO or accessory parts, unless defined by the dimension definition.
The dimensions in this document are classified in groups of relevant interest. Each dimension is assigned a code which is composed of a prefix letter denoting the direction or type of dimension and a number issued in sequence as required by each prefix letter. The code is interpreted as follows:. To assist in locating dimensions in this document, numeric and alphabetic sequences are shown in Sections 15 and All other adjustable features, such as an adjustable steering wheel and adjustable seat height, a seatback that adjusts independently from the Seat Cushion, power 4-way or 6-way seats, etc.
Steering wheel shall be positioned with from the wheels in straight-ahead position. All interior dimensions for designated seated positions are defined on the Y-Plane centerline of the occupant, unless otherwise defined in the dimensions definition.
The H-Point machine and two-dimensional drafting template specified in SAE J shall use the 95th percentile leg segments. For heavy-duty trucks, suspension seats will be positioned as specified by the vehicle manufacturer in the normal driving position with any fore and aft isolator locked out.
The front wheels shall be positioned in the straight-ahead position. All exterior dimensions define the proportional shape of the vehicle, as opposed to its designed pieces. For example, when two vehicles with the same front end profile are designed, one with a bolt on bumper and one with bumper integrated with the front end, the front end length dimension L on both vehicles will be the same.
All head restraints shall be in the stowed position and considered part of the seat. Refer to Section See Figures 4 through For Interference condition, move the head contour in the opposite direction and indicate a negative dimension. For interference condition, move the head contour in the opposite direction and indicate a negative dimension.
The lower leg segments are detached to allow free rotation of the thigh segment around the SgRp. This assumes that the seat is not rotated and design Cushion Angle is maintained. For vehicles with SgRP to heel H30 greater than mm, the accelerator pedal may be depressed as specified by the manufacturer. If the accelerator is depressed, the manufacturer shall place foot flat on pedal and note the depression of the pedal. If the seatback is adjustable, use the normal driving and riding position specified by the manufacturer.
The center of Knee Pivots are laterally separated for proper foot placement. The right pivot is with the right foot lined up on the accelerator and the left pivot is with the left foot on the floor in line with the clutch pedal. Any portion of this mm by mm area around the SgRP in side view below and behind the seat cushion and seat back trim is excluded.
If the area is totally excluded by the seat cushion and seat back trim, measure width to trimmed door or trim surface closest, in side view, to the SgRP. See Figures 6, 7, 9, and If the second seat is adjustable, it should be positioned at the SgRP and at a back angle as specified by the manufacturer.
The foot may be placed on the floor pan with the centerline of the leg segment up to mm either side of the Y plane occupant centerline. If the area is totally excluded by the seat cushion and seat back trim, measure width to trimmed door or quarter trim surface closest, in side view, to the SgRP. Dimension shall be taken from the back of the cab to the forward edge of the mattress support surface.
Truck definition: sleeper width. Truck definition: sleeper length. See Figure For rear-facing third seat, measure from the trimmed seat back at a height tangent to the top of the third Seat Cushion surface, rearward to the interior tailgate closure. If there is a step, the dimension is measured vertically from the ground to the first step entering the vehicle. If there is no second step, the dimension will be to the top of the sill plate bead at the center of the lower door opening.
See Figures 5, 12, 13, and If the mirror is located on the instrument panel, the dimension will be measured from the top of the mirror frame in the highest usable position to the bottom of SAE 95th percentile eyellipse.
NOTE—The steering column center is used instead of the wheel center to eliminate error that could occur with a non-symmetrical Steering Wheel. Measure the same as H The upward angle sightline is at 7 degrees tangent to the upper portion of the eyellipse while the downward angle sightline is at 5 degrees tangent to the lower portion of the eyellipse. Specify location. In case of dual wheels, the dimension will be measured to the centerline of tire and wheel assemblies.
The standard right and left mirror adjusted for normal driving will be shown unless otherwise noted. In the case of dual rear axles, the dimension will be taken at centerline between the rear wheels. In case of dual rear axles, the dimension shall be to the midpoint of the centerlines of the rear wheels. The limiting structural component shall be designated. The limiting component shall be designated. Specify component. For vehicles with more than three seats, specify seat location along with dimension.
For vehicle with more than three seats, specify seat location along with dimension. This surface is the rearmost point of driver's seat on trucks with closed cargo area and is the front surface of the inside of cargo box on trucks with open cargo area. The dimension shall be at height of the cargo floor surface.
If floor surface at engine cover is above cargo floor surface, then length is taken at floor to engine cover intersection height. For any vehicle not trimmed, measure the sheet metal.
See also Figures 27 and This dimension excludes wheelhouses, local protrusions, and local depressions or pockets. Luggage Capacity— Passenger car enclosed Luggage Compartments including hatchbacks and station wagons partitioned to secure hidden cargo. Total of volumes of individual pieces of standard luggage set plus H-boxes stowed in the Luggage Compartment in accordance with the procedure described in 9.
A set of shoe-type boxes H-boxes are optionally used with the Standard Luggage Set. Descriptions and sizes of the luggage pieces are detailed in Table 1. When the best load is obtained using the Standard Luggage Set, H-boxes may be added to arrive at the final load. Pieces from subsequent Standard Luggage Sets may be used when the previous set is placed in the Luggage Compartment. A piece from the Standard Luggage Set may be removed to place an H-box in the compartment, provided the removed piece is replaced.
The standard equipped spare tire and tools shall be properly installed in the Luggage Compartment. They may be loosened and moved to the limits of the attaching hardware and then retightened to attain the most advantageous position. Standard parts of the vehicle normally stored in the Luggage Compartment, such as a convertible top, shall be in the stored position when the usable Luggage Capacity is determined.
The Luggage Compartment Lid or access door must close and lock freely without forcing or excessive slamming with all of the luggage in place in the compartment. Cargo Volume Index— Input values are mm inches.
SAE J1100: Motor Vehicle Dimensions
In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. Scope —This SAE Recommended Practice defines a uniform set of interior and exterior dimensions for passenger cars, multipurpose passenger vehicles, and trucks. Unless otherwise indicated, the latest revision of SAE publications shall apply. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.
Motor Vehicle Dimensions
The dimensions are primarily intended to measure the design intent of a vehicle within a design environment i. All dimensions in this practice can be measured this way. In addition, some dimensions can be taken in an actual vehicle. If measurements are taken on physical properties, some differences in values should be expected. Also, care should be taken to not confuse design intent measurements with those taken on a physical property.
Subscribers can view annotate, and download all of SAE's content. View Details. This SAE Recommended Practice defines a set of measurements and standard procedures for motor vehicle dimensions. The dimensions are primarily intended to measure the design intent of a vehicle within a design environment i. All dimensions in this practice can be measured this way.