Using hooked bars in lieu of threaded bars for soil nailed wall
Using hooked bars in lieu of threaded bars for soil nailed wall
(OP)
I wonder if anyone has experience using bars with a standard 90 degree bend instead of threaded bars for soil nailed retaining walls (shotcrete fascia). We typically use a minimum 3 inch thick shotcrete facing, although actual concrete use indicates an average thickness of more than 4 inches.. Typically these walls are temporary (1-6 months).
I understand there may be a problem with minimum cover in attaining required development length in the bend. I also understand ties may be necessary to compensate for the minimum cover. However,the shotcrete facing is almost always very thick in the immediate vicintiy of the nail.
Would a layer of welded wire fabric (6"x6"X WW2.9, the old 6x6x6 gage)placed over the full length of the bend with at least 2.5 inches of shotcrete placed over the bend be sufficient to reach the full tensile strength of the bar with an ACI standard bend length?
I understand there may be a problem with minimum cover in attaining required development length in the bend. I also understand ties may be necessary to compensate for the minimum cover. However,the shotcrete facing is almost always very thick in the immediate vicintiy of the nail.
Would a layer of welded wire fabric (6"x6"X WW2.9, the old 6x6x6 gage)placed over the full length of the bend with at least 2.5 inches of shotcrete placed over the bend be sufficient to reach the full tensile strength of the bar with an ACI standard bend length?





RE: Using hooked bars in lieu of threaded bars for soil nailed wall
RE: Using hooked bars in lieu of threaded bars for soil nailed wall
RE: Using hooked bars in lieu of threaded bars for soil nailed wall
The code normally requires closely spaced stirrups along the hooked length if you are using the minimum development length for hooked bars. We are using wire mesh (6x6x6 gage) above and below the bar instead of stirrups. I am wondering if I could use a hooked length somewhere in between the minimum development length for hooked and straight bars.
RE: Using hooked bars in lieu of threaded bars for soil nailed wall