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headed anchors for GR75 bar

headed anchors for GR75 bar

headed anchors for GR75 bar

(OP)
I am designing single bar tension reinforcement for piles - the tension center bar is GR75, non-threaded.  I was planning on using terminators to develop the bar but they are limited to GR60 bars.  If the bars were threaded I would use a plate and nut system; the bars are already on site so I have to use the non-threaded bars.  ACI 318-08, Section 12.6 states that anchors may not be used for bar fy > 60 ksi.  Any thoughts on other options?
Piles are 14 inch diameter w/ 6#6 cage bars that extend 18" into the cap, which is 3 ft. thick.
Thanks-  

RE: headed anchors for GR75 bar

dywidag has mechanical splices and terminations for Grade 75

RE: headed anchors for GR75 bar

Can you have them thread the ends of the rebar on site?

RE: headed anchors for GR75 bar

(OP)
The steel supplier sent us the wrong bars so we are going to use the ZAP screw lock system to splice short thread bars to the non-thread bars. The ZAP Type 2 splices are suitable for GR75 bars.  The std plate & nut will then be added to the spliced thread bars.  I will leave 4" clearance at the top of the cap for the short thread bars.

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