Devices for Use in Defining and Measuring Vehicle Seating Accommodation
J826_202106
The devices of this SAE Standard provide the means by which passenger compartment dimensions can be obtained using a deflected seat rather than a free seat contour as a reference for defining seating space. All definitions and dimensions used in conjunction with this document are described in SAE J1100. These devices are intended only to apply to the driver side or center occupant seating spaces and are not to be construed as instruments which measure or indicate occupant capabilities or comfort. This document covers only one H-point machine installed on a seat during each test. Certified H-point templates and machines can be purchased from:
SAE International
400 Commonwealth Drive
Warrendale, PA 15096-0001
Specific procedures are included in Appendix A for seat measurements in short- and long-coupled vehicles and in Appendix B for measurement of the driver seat cushion angle. Specifications and a calibration inspection procedure for the H-point machine are given in Appendix C. Additional considerations are necessary when a head restraint measuring device (HRMD) is mounted to an H-point machine (Appendix D).
Rationale:
This document has been revised to include:
A new appendix describing the location and purpose for optional measurement divots located on the HPM head room probe, T-bar, and shoes.
An improved definition of the muslin cloth used during the physical installation.
Corrections to the HPM calibration sections regarding the lower leg weight tolerances and the combined HPM-HRMD.
All other content has been reaffirmed to comply with the SAE Five-Year Review policy.
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Related Topics:
Human factors
Seats and seating
Flooring
Passenger compartments
Leg
Safety belts
Torso
Foot
Also known as: SAE J 826
The devices described in this document provide a method for a reliable layout and measurement of occupant seating compartments and/or seats. They are not to be construed as tools that measure or indicate occupant capabilities or comfort.
The devices are intended for applications at designated seating positions. They are not intended for use in defining or assessing temporary seating, such as folding jump seats.
When using the H-Point Machine (HPM), interactions can occur between adjacent seating positions (i.e., having an HPM installed at the center occupant position can change the results obtained for the outboard occupant position). Therefore, only one machine should be installed in a particular row of seats during each test.
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