IS 5751 -1984 Code Book PDF free download
This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on 30 April 1984, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by the Civil Engineering Division Council. Precast concrete coping blocks serve as the first line of defense against the entry of moisture into hollow concrete block walls. The effectiveness in keeping water out of walls depends entirely upon the way in which the coping blocks are designed and constructed. The functional requirements to be met by a coping system are as follows:
a) It should prevent downward penetration of water through the coping system and damp-proof course should always be used;
b) It should direct water clear of the wall below;
c) It should resist lateral displacement by the forces likely to be applied to it in the situation in which it is used. This may be achieved either by its mass ( see 5.1 ) or mechanical means, for example, the form of the coping, the clip type ( see 3.1 ), or the use of cramps and dowels ( see 2.5 );
d) It should allow for thermal and moisture movements ( see 7.3 ); and
e) It should be durable. This can be achieved by selection of materials for the coping system ( see 2 ),
While it may not always be possible to meet all these requirements fully, this specification gives criteria by which coping blocks may be judged. This standard was first published in 1969. The present revision has been prepared with a view to incorporating the modifications found necessary in the light of experience gained during the use of this standard and to align with the requirements of various related standards which have been revised consequent to the publication of the earlier version of this standard. In this revision the requirements in respect of aggregates have also been modified. 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*. 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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