GMW GMW3020 PDF

Note: Nothing in the specification supersedes applicable laws and regulations unless specific exemption has been obtained.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

This specification establishes the safety belt webbing requirements for 3 - point safety belt assemblies intended to provide design verification and compliance to the Federal Motor Vehicle Safety Standard (FMVSS) 209 and other global regulatory requirements for future GM vehicles. It defines common key physical and functional requirements enabling interchangeability between supplier systems for GM vehicles worldwide. This set of specifications is intended to provide uniform direction to the various engineers regarding the design requirements, testing, and validation of each belt system being developed for GM vehicles. In part, when validated to these requirements, the safety belt system will provide a reasonable and appropriate level of performance in real world crashes.

This specification does not apply to safety belt webbing used as buckle straps, guide loop straps, or in 2 - point safety belt assemblies.

Material Description. This specification describes a narrow woven fabric used in certain safety belt applications. The webbing described in this specification is only intended for use within retractor-side assemblies of 3 - point safety belts.

The material is constructed with a double needle loom using monofilament and multifilament weft yarns. The material has knit selvages that are rounded and completely hide the weft reverse points of the monofilament. 

Symbols. Not applicable. 

Typical Applications. Webbing described in this specification is classified as being either:

Type A: Standard thickness webbing for use in most applications.

Type B: Slightly thinner webbing for use in selected applications where additional webbing will be needed to stow into a retractor that otherwise couldn't stow that length of webbing.

Type C: Low Elongation webbing for use in selected applications where a lower elongation rate is required. Low Elongation webbing is also thinner than Type A webbing.

Type D: High Elongation webbing for use in selected applications where a higher elongation rate is required. High Elongation webbing is also thicker than Type A webbing.

Except where explicitly indicated, there are no differences in the requirements for Type A, Type B, Type C and Type D webbing. 

Remarks. Safety belt webbing is a textile product that is an integral component of a safety belt assembly. Vehicle safety belts are intended to provide injury protection benefit to occupants of the vehicle in the event of a crash. Their primary function is to restrain an occupant (or child seat), and to reduce the risk or severity of injury by managing the occupant's kinetic energy.

Safety belt webbing must function in harmony with the rest of the safety belt subsystem, be as comfortable and unobtrusive as practicable, and be in visual harmony with the interior theme of the vehicle.

Webbing must also comprehend the differences in governmental and market requirements of the different countries in which it is sold.

In the event of a conflict between this specification and the documents cited herein, the text of this specification takes precedence. Nothing in this specification, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.