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GB/T 5143-2008 PDF in English


GB/T 5143-2008 (GB/T5143-2008, GBT 5143-2008, GBT5143-2008)
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GB/T 5143-2008: PDF in English (GBT 5143-2008)

GB/T 5143-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 53.060
J 83
GB/T 5143-2008 / ISO 6055:2004
Replacing GB/T 5143-2001
Industrial trucks – Overhead guards – Specification and
testing
(ISO 6055:2004, IDT)
ISSUED ON: FEBRUARY 03, 2008
IMPLEMENTED ON: JULY 01, 2008
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Requirements for high lift rider trucks with lift height exceeding 1 800 mm ... 6
4 Requirements for variable reach trucks with operator position not protected by the
boom ... 13
Bibliography ... 15
Foreword
This Standard is identical to the adoption of ISO 6055:2004 Industrial trucks –
Overhead guards – Specification and testing (English version).
This Standard is identical to the translation of ISO 6055:2004.
For ease of use, this Standard makes the following editorial changes:
– CHANGE the word “this International Standard” TO “this Standard”;
– DELETE the Foreword of the International Standard;
– For other international standards – cited in ISO 6055:2004 – which have been
adopted in our country, REPLACE the international standards with corresponding
standards of our country; for international standards which are not adopted in our
country, directly QUOTE.
This Standard replaces GB/T 5143-2001 High-lift rider trucks - Overhead guards -
Specification and testing.
Compared with GB/T 5143-2001, the main changes in this Standard are as follows:
– ADD “requirements and testing of operators’ legs and feet protection, roll-over
protection system (ROPS) and falling-object protection system (FOPS)” to Clause
1, and REMOVE inapplicable products;
– ADD five normative references to Clause 2;
– ADD “3.1 Introduction” and “4.1 Introduction”;
– CHANGE “the vertical distance, from the lowest point of the seat surface when an
operator weighing 90 kg sits down to the underside of the section of the overhead
guard under which the operator’s head is located when the vehicle is in normal
running state, shall not be less than 1 000 mm” in 3.2.3 of the original standard TO
“the vertical clearance, from the seat index point (in accordance with GB/T 8591)
to the underside of the section of the overhead guard under which the operator’s
head is located when the operator is in the normal operating position, shall not be
less than 903 mm” in 3.3.3 in this Standard.
– ADD an example of reducing the normal overhead guard height (3.3.5 of this
Standard);
– ADD the content of “Where the manufacturer of the overhead guard has been
informed that the user may be at risk from falling objects which could pass through
the 150 mm opening, then the guard shall be constructed to remove that risk, with
the opening set as necessary based upon the information supplied” (3.3.6 of this
Standard);
– ADD Figure 4, Figure 5, Figure 6 and Figure 7;
– REMOVE the content of static test in 4.2 of the original standard;
– ADD “The first of the nine drops to be from a point at the front of the overhead
guard” to the test method of dynamic test (3.4.2.3 of this Standard);
– ADD the impact drop test (3.4.3 of this Standard);
– ADD the operators’ legs and feet protection test (3.4.4 of this Standard);
– ADD requirements following the impact drop test and the operators’ legs and feet
protection test to the clause on performance requirements (3.5.2 and 3.5.3 of this
Standard);
– ADD “Requirements for variable reach trucks with operator position not protected
by the boom” (Clause 4 of this Standard).
This Standard is proposed by China Machinery Industry Federation.
This Standard is under the jurisdiction of Beijing Materials Handling Research Institute.
The organization responsible for drafting this standard: Beijing Materials Handling
Research Institute.
Organizations participating in the drafting of this Standard: Anhui Heli Co., Ltd.,
Zhejiang Hangcha Engineering Machinery Co., Ltd., Ningbo Ruyi Joint Stock Co. Ltd.,
Zhejiang Noblift Machinery Co., Ltd., Baoji Shuangli Forklift Manufacturing Co., Ltd.
and Tianjin Port (Group) Co., Ltd.
The main drafter of this standard: Zhao Chunhui.
The previous versions of the standard replaced by this Standard are GB/T 5143-1985
and GB/T 5143-2001.
Industrial trucks - Overhead guards - Specification and
testing
1 Scope
This Standard specifies the requirements and testing of overhead guards, operators’ legs
and feet protection, roll-over protection system (ROPS) and falling-object protection
system (FOPS) for any type of high lift, rider operated, powered industrial truck with a
lift height exceeding 1 800 mm.
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/T 8591, Earth-moving machinery - Seat index point (GB/T 8591-2000, eqv
ISO 5353:1995)
GB 10827, Powered industrial trucks - Safety code (GB 10827-1999, eqv ISO
3691:1980)
GB/T 17771, Earth-moving machinery - Falling-object protective structures -
Laboratory tests and performance requirements (GB/T 17771-1999, eqv ISO
3449:1992)
GB/T 17772, Earth-moving machinery - Laboratory evaluations of protective
structures - Specifications for deflection-limiting volume (GB/T 17772-1999, idt
ISO 3162:1995)
GB/T 17922, Earth-moving machinery - Roll-over protective structures -
Laboratory tests and performance requirements (GB/T 17922-1999, idt ISO
3471:1994)
ISO 13564-1, Powered industrial trucks – Test methods for verification of visibility
– Part 1: Sit-on and stand-on operator trucks and variable-reach trucks up to and
including 10 t capacity
Where there is reduced vertical clearance, information shall be provided with the
overhead guard specifying any limits associated with the height of operators who may
use trucks on which the guard is fitted.
3.3.6 Where the manufacturer of the overhead guard has been informed that the user
may be at risk from falling objects which could pass through the 150 mm opening (see
3.3.2), then the guard shall be constructed to remove that risk, with the opening set as
necessary based upon the information supplied.
3.4 Testing
3.4.1 General
3.4.1.1 A dynamic and an impact drop test shall be carried out on a guard fitted to a
truck of the type and rated capacity for which it has been designed. Alternatively, the
guard may be mounted on a test chassis provided that the mounting is the same as that
on the truck for which it was designed.
3.4.1.2 The same overhead guard and mounting shall be used for both tests. The
dynamic test, as described in 3.4.2, shall be conducted first, followed by the impact
drop test, as described in 3.4.3.
3.4.1.3 In the case of specially designed overhead guards fitted to trucks, other means,
such as calculation methods that have been verified through tests on comparable guards,
may be used to determine compliance with the requirements.
3.4.1.4 For trucks with an elevating operator position and an auxiliary lifting equipment
with a lift height up to and including 1 800 mm in relation to the operator platform, the
impact test is not required.
3.4.2 Dynamic test
3.4.2.1 The purpose of this test is to determine the resistance to permanent deflection
of the portion of the overhead guard under which the operator sits or stands.
Note: In the case of overhead guards fitted to trucks of special design, other means,
such as computation or prior test results, may be used to determine compliance
with the requirements.
3.4.2.2 The test object shall be a mass of 45 kg having a square striking face with a side
dimension of 300 mm. The striking face shall be of oak wood or material of a similar
density and at least 50 mm thick. The corners and edges shall have a radius of 10଴ାହmm.
3.4.2.3 The test object shall be positioned to drop in free fall with the striking face
approximately parallel to the top of the overhead guard, so as not to strike with a corner
or an edge. The test object shall be dropped a distance of 1.5 m 10 times. The first drop
shall be from a point with the centre of the test object vertically above the seat index
point of the operator’s seat (in accordance with GB/T 8591, with the seat in its mid-
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.