I have passed this information along to our field crew as well as our qualified person who will design the supports. I appreciate the help with this and will make sure that we brace all the rebar cages until the forms are installed and braced per the manufacturers design.
Thank you all for the information and the advice. I have spoken with a few of our guy onsite and they said once we get one stood and see how it acts with the 9'-6" #11 dowels and #11 verticals bars in the column then we will see what supports we may need to secure it until the forms are attached.
By column I mean just the rebar cage. Our GC wants to make sure the dowels that are embedded into the footer will be enough to keep the cage from tipping over. The 775 lbs is the force we came up with that would take to get the rebar cage to start rotating. I guess the real question is how do I...
we have to do a field check for overturning on a 25' tall rebar cage with 9'-6" column dowels extending from the footer. The force required to overturn the column is 775 lbs but I need to check what force it would take to make the column rotate over the 9'-6" dowel. The Cage weight is 5536 lbs...
I should add that I am aware field testing is not for acceptance and this is more for quality control to help the contractor achieve the required compaction. This is due to a faa project currently that has issues with the air voids being below 2 percent on the cores.
When taking an in-place field density testing on an FAA P-401 spec, do you use the theoretical maximum density (rice value) or the bulk specific gravity (marshall value as the others in my office call it). I have done 3 different airport jobs on the east coast and I always used the rice value in...
