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IS 3177 : 1999
Edition 3.2 (2003-07)
( Reaffirmed 2006 )

Indian Standard

CODE OF PRACTICE FOR ELECTRIC OVERHEAD TRAVELLING CRANES AND GANTRY CRANES OTHER THAN STEEL WORK CRANES ( Second Revision )
(Incorporating Amendment Nos. 1 & 2)

ICS

53.020.20

© BIS 2004

BUREAU

MANAK BHAVAN , 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002

OF INDIAN

STANDARDS

Price Group 15

Cranes, Lifting Chains and Related Equipments Sectional Committee, HMD 14

FOREWORD This Indian Standard (Second Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Cranes, Lifting Chains and Related Equipments Sectional Committee had been approved by the Heavy Mechanical Engineering Division Council. This standard covers mechanical and electrical aspects related to design, manufacture, erection and testing of electric overhead travelling cranes and gantry cranes used in hazardous areas like Gas Group 2c. Electrical motors and electric thruster unit for brakes, limit switches, Pendant push button station and panels shall be of flameproof suitable for Gas (Group 2c). An attempt is made here to include provisions: a) to bring this standard in line with the International Standards, b) to keep higher factor of safety for hoisting mechanisms compared to travelling mechanisms which may reduce cost of cranes without sacrificing safety, and c) to help standardization, as far as possible, relating requirements for components to basic duty factor for class of mechanisms. While preparing this standard assistance has been derived from various Indian, British, DIN, FEM and ISO standards to bring this standard in line with the International Standards. As followed in the International Standards, structural provisions for cabin, walkways and means of access are not included in this standard. It is proposed that the same should be added in IS 807. In line with this standard and new classifications now adopted, IS 807 should be modified. Provisions in IS 807 for allowable stresses, deflection criteria, wheel base to span ratio and tolerances on spans, wheel alignment, etc, be modified to bring the standard in line with International Standard. The new classification of cranes now coming into effect and the classification presently in use can approximately be compared as follows: Old Equivalent I II III IV New Classification M3 M5 M7 M8

This edition 3.2 incorporates Amendment No. 1 (December 2000) and Amendment No. 2 (July 2003). Side bar indicates modification of the text as the result of incorporation of the amendments. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values ( revised )’. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

IS 3177 : 1999

Indian Standard

CODE OF PRACTICE FOR ELECTRIC OVERHEAD TRAVELLING CRANES AND GANTRY CRANES OTHER THAN STEEL WORK CRANES ( Second Revision )
1 SCOPE This code covers mechanical, electrical, inspection and testing requirements relating to the design, manufacturing and erection of electric overhead travelling cranes, portal and semi-portal cranes, single girder, double girder or mono-box type ( see Fig. 1 ). It does not cover steel work cranes which are covered in IS 4137 : 1985 and new classification for the crane as a whole, which has been defined as from No. A1, A2, ...... A8 and crane mechanism has been defined as from Nos. M1, M2, ..... M8 according to IS 13834 (Part 1) : 1994. 2 REFERENCES 2.1 The Indian Standards listed in Annex F are necessary adjuncts to this standard.

FIG. 1 TYPICAL CRANE TYPES ( Continued ) 1

IS 3177 : 1999

FIG. 1 TYPICAL CRANE TYPES SECTION 1 3 TERMINOLOGY 3.1 General For the purpose of this standard the definitions...
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