GB 26134-2024_English: PDF (GB26134-2024)
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Roof crush resistance of passenger cars
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GB 26134-2024
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Standards related to: GB 26134-2024
| Standard ID | GB 26134-2024 (GB26134-2024) | | Description (Translated English) | Roof crush resistance of passenger cars | | Sector / Industry | National Standard | | Classification of Chinese Standard | T26 | | Classification of International Standard | 43.040.60 | | Word Count Estimation | 10,133 | | Date of Issue | 2024-08-23 | | Date of Implementation | 2025-07-01 | | Older Standard (superseded by this standard) | GB 26134-2010 | | Administrative Organization | Ministry of Industry and Information Technology of the People's Republic of China | | Proposing organization | Ministry of Industry and Information Technology of the People's Republic of China | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB26134-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
CCS T 26
Replacing GB 26134-2010
Roof crush resistance of passenger cars
ISSUED ON. AUGUST 23, 2024
IMPLEMENTED ON. JULY 01, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Technical requirements... 5
5 Test method... 5
6 Determination of the same type... 8
7 Implementation of the standard... 8
Roof crush resistance of passenger cars
1 Scope
This document specifies the technical requirements, test method and determination of
the same type for the roof crush resistance of passenger cars.
This document applies to M1 vehicles and not to convertibles.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB 11551 The protection of the occupants in the event of a frontal collision for motor
vehicle
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
sunroof
Fixed or movable (slide and/or tilt) roof cover.
3.2
front windshield trim
Any trim between the front windshield and the outer surface of the roof.
3.3
raised roof
The raised area on the roof system (located on the top of the passenger compartment,
consisting of the frame, panel interior and related body accessories).
3.4
altered roof
A replacement roof that is higher than the original roof after the original roof of the
vehicle has been partially or completely removed.
NOTE. If part or all of the original roof of the vehicle is replaced by a roof with safety glass material
and the replacement roof is installed on the same plane as the original roof, the roof is not considered
to be an altered roof (such as T-roof and sunroof).
3.5
roof over the front seat area
The part of the roof in front of the horizontal vertical plane 162 mm rearward from the
H point, when the front outer seats are in the rearmost and lowest locking position.
NOTE. It includes the front windshield trim.
4 Technical requirements
According to the test method specified in Clause5, for vehicles with symmetrical body
structures, one side is randomly selected to apply the load; for vehicles with
asymmetrical body structures, the weaker side of the body structure is selected to apply
the load. The load is 3.0 times the curb weight of the vehicle or 45.0 kN (take the smaller
of the two). When the load reaches the specified value, the movement of the lower
surface of the loading device shall not be greater than 127 mm, and the combined force
on the head model shall not be greater than 222 N (g is 9.8 N/kg).
5 Test method
5.1 Before the test, support the vehicle so that its tires are off the ground, rigidly fix the
vehicle’s sill beams and frame (if applicable) on a horizontal plane, adjust the vehicle
so that the longitudinal tile angle at the sill beams on both sides is 0° ± 0.5°, and the
difference of the vertical distances between the reference point on the lower surface of
the sill beams on both sides and the horizontal plane is not greater than 10 mm. Close
all windows, close and lock all doors, and close all sunroofs and sunshades. Remove
the roof rack and other non-structural parts. At the manufacturer’s request, the test may
be carried out using a body-in-white with all the components necessary for the test
installed.
5.2 The front outer seats of the vehicle are adjusted to the specified positions as follows.
a) For the longitudinally adjustable front outer seats, they shall be locked in the
middle position of the travel or the rearward position closest to the middle
position; if they are individually adjustable in the vertical direction, they shall be
adjusted to the design position specified by the manufacturer or middle position.
mm from the transverse vertical plane 254 mm forward of the foremost point of
the outer surface of the roof, and the foremost point of the outer surface of the
roof includes the front windshield glass trim located on the longitudinal vertical
plane passing through the longitudinal centerline of the vehicle.
5.6 For vehicles with raised roofs or altered roofs, adjust the position of the loading
device in accordance with the provisions of 5.5.If the contact point between the loading
device and the roof is located on the raised roof or altered roof behind the roof above
the front seat area, the position of the loading device shall be adjusted so that the
midpoint of the rear edge of its lower surface is within a range of no more than 10 mm
from the last transverse vertical plane of the roof above the front seat area.
5.7 Move the loading device straight downward in a direction perpendicular to its lower
surface. The loading speed shall not exceed 13 mm/s until the load specified in Clause
4 is reached. The loading process shall be completed within 120 seconds, and the
loading device shall not rotate during the loading process.
5.8 Measure the movement of the lower surface of the loading device, which is the
distance between the initial position of the lower surface of the loading device and the
corresponding position when the load specified in Clause 4 is reached; measure the
combined force on the head model during the loading process and record the maximum
value.
6 Determination of the same type
If the following provisions are met, it is considered to be the same type.
a) The body structure type is the same (load-bearing/semi-load-bearing/non-load-
bearing, one-compartment/two-compartment/three-compartment, whether the
left and right are symmetrical);
b) The number and structure type of the sunroof (if any) are the same;
c) The internal dimensions of the passenger compartment are the same, the type of
body frame material is the same, the body frame size is the same or the structure
is strengthened;
d) The curb weight of the vehicle is the same or reduced, or increased by no more
than 8 %.
7 Implementation of the standard
For new models applying for type approval, implementation will begin from the date
of implementation of this document.
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