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785 - IS 785:1998 Indian Standard REINFORCED CONCRETE POLES...

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IS 785:1998 Indian Standard REINFORCED CONCRETE POLES FOR OVERHEAD POWER AND TELECOMMUNICATION LINES - SPECIFICATION ( Second Revision ) ICS 91.100.30 0 BIS 1998 BUREAU OF INDIAN STANDARDS MANAKBHAVAN,9 BAHADURSHAHZAFARMARG NEW DELHI llOiJO2 March 1998 Price Group 4
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Cement Matrix Products Sectional Committee, CED 53 FOREWORD This Indian Standard ( Second Revision ) was adopted by the Bureau of Indian Standards, after the draft finalized by the Cement Matrix Products Sectional Committee had been approved by the Civil Engineering Division Council. This specification has been prepared with a view to clarifying and defining design requirements for different types of reinforced cement concrete poles used in overhead electric power transmission, telephone and telegraphs circuits. The specification relates to concrete poles in the manufacture of which mechanical compacting methods, such as vibration, shocking, spinning, etc, have been adopted, and does not relate to hand compacted poles. This standard was first published in 1957 and subsequently revised in 1964. The present revision has been taken up with a view to incorporating the modification found necessary in the light of experience gained with the use of this standard and due to revision of various referred standards, This revision incorporates significant modifications in respect of materials, design, depth of planting, testing, sampling and inspection. The composition of the technical committee responsible for the formulation of this standard is given in Annex B. 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.
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Indian Standard REINFORCED CONCRETE POLES FOR OVERHEAD POWER AND TELECOMMUNICATION LINES - SPECIFICATION ( Second Revision ) IS 785:1998 1 SCOPE 3.5 Working Load This standard covers reinforced concrete poles suitable for use in overhead power, traction and tele- communication lines. This standard does not cover prestressed concrete poles or prestressed concrete poles using untensioned reinforcement. The maximum load in the transverse direction, that is, ever likely to occur, including the wind pressure on the pole. This load is assumed to get at a point 600 mm below the top with the butt, end of the pole planted to the required depth as intended in the design. 2 REFERJENCES 4 OVERALL LENGTH OF POLES The Indian Standards listed in Annex A contain provisions which, through reference in this text, constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed in Annex A.
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