U bars 3

[snghabhay16]

Hi all, I just recently got an introduction to this handy tool as a recent industry grad.

I was just wondering about the need to use a U bar instead of a typical straight reinforcement bar anywhere on slabs?

Your help will be much appreciated!

 

[phamENG]

Straight bars are less expensive, easier to fabricate cages, cause less congestion, etc. BUT...they require longer development lengths so they don't always fit. If you don't have enough room to develop a straight bar, hooks (90 degree, 180degree/'candy cane', etc.) become viable options to reduce development length, but at the cost of rebar congestion, more expensive fabrication, etc.

 

[hokie66]

I like to use U-bars in two situations:

1) Maximum efficiency of opening joints, particularly in retaining walls.
2) Anchor bolts.

 

[EZBuilding]

I also use U-bars at edges of slabs where a parapet, railing or similar appurtenance can induce a moment in both directions.