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Stirrup splice for grade beam wall

Stirrup splice for grade beam wall

Stirrup splice for grade beam wall

(OP)
I have a contractor that wants to use a two piece stirrup for a grade beam wall. The approach they want to use is to place U-bars with double 135 degree hooks on both ends. For the top cap they want to use a bar with one 135 degree hook and one 90 degree hook. Their hook lengths are appropriate for the bar size but I have not seen this approach used before. Is the use of the hooks in this configuration adequate or do they need to use a standard double U-stirrup with a 1.3 X development length as shown in 318-25.7.1.7

RE: Stirrup splice for grade beam wall

I don't understand....if you have a double "U" bar with hooks each end why you then need a cap?

Don't you have a "U" bar with the bottom of the "U" on the bottom and another "U" bar with the "U" on the top?

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RE: Stirrup splice for grade beam wall

I think it's gotta be the 1.3 lab if you're going with the U-bar approach.

How tall are the walls? Where things start to take on the proportions of walls rather than beams, I've relaxed stirrup engagement requirements significantly.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

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