What is the outside #4 hoop dimension for 42 inch square column?
What is the outside #4 hoop dimension for 42 inch square column?
(OP)
To all - I am managing the installation of 42-inch square footing pedestals for a small substation. A very large and reputable reinforcing steel company detailed the outside dimension of the hoops as 38-inches square. All the site steel has been detailed assuming the outside clearances are at minimums. While the hoops hold the 38-inch dimension well, we are fighting a lack of 2-inch clearance to the face of the steel forms on just about every footing. Some footings, we are lucky if we get 1-1/2 inches clear.
Was this a mistake? Should the hoops been detailed for 37 or 36 inch square?
Was this a mistake? Should the hoops been detailed for 37 or 36 inch square?






RE: What is the outside #4 hoop dimension for 42 inch square column?
RE: What is the outside #4 hoop dimension for 42 inch square column?
RE: What is the outside #4 hoop dimension for 42 inch square column?
I thought it was 1.5" clear to the ties. That would give 39".
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: What is the outside #4 hoop dimension for 42 inch square column?
A 38" outside dimension for stirrups provides 2" clear cover and would be standard steel detailing practice. But even if the cover in some locations is as low as 1-1/2", there is nothing much to worry about.
BA
RE: What is the outside #4 hoop dimension for 42 inch square column?
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: What is the outside #4 hoop dimension for 42 inch square column?
RE: What is the outside #4 hoop dimension for 42 inch square column?
Again the question remains whether using 38 inches as the out-to-out tie dimension requires near perfection to maintain even a minimum 1.5 inch clearance (2 inches minus a 1/2 inch placement tolerance.
RE: What is the outside #4 hoop dimension for 42 inch square column?
RE: What is the outside #4 hoop dimension for 42 inch square column?
But it does require very accurate placement to maintain a 2" cover on each of the four sides.
BA