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GB/T 26949.21-2023 PDF in English


GB/T 26949.21-2023 (GB/T26949.21-2023, GBT 26949.21-2023, GBT26949.21-2023)
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GB/T 26949.21-2023: PDF in English (GBT 26949.21-2023)

GB/T 26949.21-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 53.060
CCS J 83
GB/T 26949.21-2023 / ISO 22915-21:2019
Replacing GB/T 26949.21-2016
Industrial Trucks - Verification of Stability - Part 21: Order-
picking Trucks with Operator Position Elevating above
1,200 mm
(ISO 22915-21:2019, IDT)
ISSUED ON: SEPTEMBER 7, 2023
IMPLEMENTED ON: APRIL 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 6
1 Scope ... 8
2 Normative References ... 8
3 Terms and Definitions ... 8
4 Test Conditions ... 9
5 Stability Verification ... 11
Bibliography ... 16
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This document is Part 21 of GB/T 26949 Industrial Trucks - Verification of Stability. GB/T
26949 has issued the following parts:
---Part 1: General;
---Part 2: Counterbalanced Trucks with Mast;
---Part 3: Reach and Straddle Trucks;
---Part 4: Pallet Stackers, Double Stackers and Order-picking Trucks with Operator
Position Elevating up to and Including 1,200 mm Lift Height;
---Part 5: Single-side-loading Trucks;
---Part 7: Bidirectional and Multidirectional Trucks1);
---Part 8: Additional Stability Test for Trucks Operating in the Special Condition of
Stacking with Mast Tilted Forward and Load Elevated;
---Part 9: Counterbalanced Trucks with Mast Handling Freight Containers of 6 m Length
and Longer;
---Part 10: Additional Stability Tests for Trucks Operating in the Special Conditions of
Stacking with Load Laterally Displaced by Power;
---Part 11: Industrial Variable-reach Trucks;
---Part 12: Industrial Variable-reach Trucks Handling Freight Containers of 6 m Length
and Longer;
---Part 13: Rough-terrain Trucks with Mast;
---Part 14: Rough-terrain Variable-reach Trucks;
---Part 15: Counterbalanced Trucks with Articulated Steering;
---Part 16: Pedestrian-propelled Trucks;
---Part 17: Towing Tractors, Burden and Personnel Carriers;
1) Currently being revised. After revision, the title of the document will be adjusted to Industrial Trucks -
Verification of Stability - Part 7: Bidirectional and Multidirectional Trucks.
---Part 20: Additional Stability Test for Trucks Operating in the Special Condition of Offset
Load, Offset by Utilization
---Part 21: Order-picking Trucks with Operator Position Elevating above 1,200 mm;
---Part 22: Lateral- and Front-stacking Trucks with and without Elevating Operator
Position;
---Part 24: Slewing Variable-reach Rough-terrain Trucks.
This document serves as a replacement of GB/T 26949.21-2016 Industrial Trucks - Verification
of Stability - Part 21: Order-picking Trucks with Operator Position Elevating above 1,200 mm.
In comparison with GB/T 26949.21-2016, apart from structural adjustments and editorial
modifications, the main technical changes are as follows:
---ISO 5053 is modified into ISO 5053-1 (see Chapter 1; Chapter 1 of Version 2016);
---The definition of “restricted steering” is modified (see 3.3; 3.3 of Version 2016);
---The requirements for casters in Test 2, Test 3, Test 4 and Test 5 are added (see 4.2.3);
---The stipulations of Point M of “trucks with rigidly supported single or tandem casters”
are modified [see 4.2.3 d); 4.2.3 d) of Version 2016];
---The description and statement of “operating speed” are modified (see Footnote b and c
of Table 1; Footnote b and c of Table 1 of Version 2016);
---The requirements for operating speed during the test are added (see Footnote g of Table
1);
---The Figure “Vehicle Position on Tilted Platform” is modified (see Table 1; Table 1 of
Version 2016).
This document identically adopts ISO 22915-21:2019 Industrial Trucks - Verification of
Stability - Part 21: Order-picking Trucks with Operator Position Elevating above 1,200 mm.
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by China Machinery Industry Federation.
This document shall be under the jurisdiction of National Technical Committee on Industrial
Trucks of Standardization Administration of China (SAC/TC 332).
The drafting organizations of this document: NOBLELIFT Intelligent Equipment Co., Ltd.;
Beijing Materials Handling Research Institute Co., Ltd.; China Hoisting & Conveying
Equipment Quality Detection and Inspection Center (CHCIC); Hangcha Forklift Co., Ltd.;
Anhui Heli Co., Ltd.; Lonking (Shanghai) Forklift Co., Ltd.; Zhejiang Zhongli Machinery Co.,
Introduction
Stability is one of the important indicators for assessing the safety of industrial trucks. High-
lift order-picking trucks whose operator position can be elevated are mainly used in high-rise
rack warehouses. In recent years, due to the increase in the demand for order-picking from high-
rise racks, the domestic sales of this type of industrial trucks has also been increasing. It is of
great significance to standardize the stability verification requirements, achieve integration with
international standards, improve product’s technical level and quality, and ensure operation
safety.
GB/T 26949 Industrial Trucks - Verification of Stability aims to establish the stability of
industrial trucks defined in ISO 5053-1 and its verification method. GB/T 26949 is proposed to
consist of the following parts:
---Part 1: General;
---Part 2: Counterbalanced Trucks with Mast;
---Part 3: Reach and Straddle Trucks;
---Part 4: Pallet Stackers, Double Stackers and Order-picking Trucks with Operator
Position Elevating up to and Including 1,200 mm Lift Height;
---Part 5: Single-side-loading Trucks;
---Part 7: Bidirectional and Multidirectional Trucks;
---Part 8: Additional Stability Test for Trucks Operating in the Special Condition of
Stacking with Mast Tilted Forward and Load Elevated;
---Part 9: Counterbalanced Trucks with Mast Handling Freight Containers of 6 m Length
and Longer;
---Part 10: Additional Stability Tests for Trucks Operating in the Special Conditions of
Stacking with Load Laterally Displaced by Power;
---Part 11: Industrial Variable-reach Trucks;
---Part 12: Industrial Variable-reach Trucks Handling Freight Containers of 6 m Length
and Longer;
---Part 13: Rough-terrain Trucks with Mast;
---Part 14: Rough-terrain Variable-reach Trucks;
---Part 15: Counterbalanced Trucks with Articulated Steering;
---Part 16: Pedestrian-propelled Trucks;
Industrial Trucks - Verification of Stability - Part 21: Order-
picking Trucks with Operator Position Elevating above
1,200 mm
1 Scope
This document specifies the test method for verifying the stability of order-picking trucks with
operator position elevating above 1,200 mm (as defined in ISO 5053-1).
This document is applicable to the same type of trucks equipped with forks, platforms and / or
integral attachments under normal operating conditions.
This document does not apply to trucks equipped with load handling devices capable of moving
sideways or rotating away from the longitudinal center plane of the trucks.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
ISO 5053-1 Industrial Trucks - Vocabulary - Part 1: Types of Industrial Trucks
NOTE: GB/T 6104.1-2018 Industrial Trucks - Terminology and Classification - Part 1: Types of
Industrial Trucks (ISO 5053-1:2015, IDT)
ISO 22915-1 Industrial Trucks - Verification of Stability - Part 1: General
NOTE: GB/T 26949.1-2020 Industrial Trucks - Verification of Stability - Part 1: General (ISO
22915-1:2016, IDT)
3 Terms and Definitions
What is defined in ISO 5053-1 and ISO 22915-1, and the following terms and definitions are
applicable to this document.
3.1 normal operating conditions
Normal operating conditions refer to the operating conditions of the trucks running indoors on
a flat, level and sufficiently hard (for example, concrete) ground.
4.2.2 Test 1
The truck shall be placed on a tilted platform, with its drive / steering axle BB and load-bearing
axle CC parallel to the tilt axis XY of the tilted platform, see Table 1.
4.2.3 Test 2, Test 3, Test 4 and Test 5
The truck shall be placed on a tilted platform, with the MN line parallel to the tilt axis XY
of the tilted platform, see Table 1.
In all positions, the casters shall be turned from the XY direction to the direction of minimum
stability.
Point M is defined as follows.
a) For trucks with a single drive / steering wheel: Point M is the vertical projection on a
tilted platform of the intersection point of the drive / steering wheel axle centerline
and the drive wheel width center plane.
b) For trucks where the drive / steering axle is mounted on an articulated frame and the
hinge point is located in the longitudinal center plane of the trucks: Point M is the
vertical projection on a tilted platform of the intersection point of the lateral axis of
the articulated frame and the longitudinal center plane AA of the trucks.
c) For trucks with tandem drive / steering wheels: Point M is the vertical projection on
a tilted platform of the intersection point of the drive / steering wheel axle centerline
and the center plane AA of the trucks.
d) For trucks with rigidly supported single or tandem casters: Point M is the vertical
projection on a tilted platform of the intersection point of the caster wheel axis
centerline and the caster wheel width center plane.
e) For trucks with non-articulated, rigidly supported casters or wheels and non-
articulated drive wheels:
1) For rigidly supported casters or wheels, Point M is the vertical projection on a
tilted platform of the intersection point of the caster or wheel axle centerline and
the caster or wheel width center plane, and the centerline of the rigidly supported
casters or wheel axle shall be close to the longitudinal center plane of the trucks;
2) For non-articulated drive wheels, Point M is the vertical projection on a tilted
platform of the intersection point of the drive wheel axle center line and the drive
wheel width center plane.
f) For trucks with non-rigidly supported casters or wheels: Point M is the vertical
projection on a tilted platform of the intersection point of the drive wheel axle
centerline and the drive wheel width center plane.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.