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ACI 543R

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If anyone out there has a more current edition of ACI 543R than the 1974 edition, could you check to see if the min. cover requirements for precast prestressed concrete pile in normal exposure has changed from 2-in.?  I'm looking at 1809.2.3.5 of the 2003 IBC, and it states that min cover shall be 1.25-in. for piles 12-in. or smaller.  I've got some 10-in. piles that I've detailed to have 2-in. of cover and the contractor wants to change it to 1.5-in.
 
Thanks,
Tripp Howard


Tripp Howard