I am working on a foundation job where we I am laying out about 50 concrete steel reinforced caissons.....25 of the require setting anchorbolts. I have done this once before with bad results. On a previous job I gave the contractor plenty of offset points for control to set the anchor bolts, I was even there when they set the anchor bolts...I pulled string lines, and measured swing ties...everything was good. Only to find out the next day that the contractor never fastened down the template and it shifted overnight. I assumed that the contractor was going to take care of this. So anyway I don't want this to happen again, so I would like some direction on how I should layout and set the anchor bolts, and mainly I want to come up with some kind of system so that every time I layout similar bolt patterns i can use the same template and be able to lock in down easily once it is in place. I am laying out 36", 48" and a few 60" caisons. 3/4" to 1" bolts with an average of 24" embeddment. the bolt patterns are either a 4 bolt pattern or an 8 bolt pattern.