Bent UP Bars Details In this exclusive civil engineering article, you will get some vital information on bent up bars. The bent up bar alias crank bars play a vital role in R.C.C beam or slabs construction because if the hogging or negative is not checked properly, the structure can collapse or the strength of the structure is minimized significantly. The hogging bending moment is produced at the supports of the slabs and beams.
BENT UP BARS: 1. Bent-up bars are arranged in the ends on the top of the slab or in the top of the mid supports (if any type of mid-support exists) to resist the negative moment known as (Hogging) developed at that sections of the slabs and beams. 2. In the slabs, there are several angles on the crank bar (known as bends). In some cases, the straight bars are arranged at the end on the top of the slab and in some cases, 45 degree angles are provided on the crank bars. In some cases, the 30° bent is arranged if there are shallow beams at the end of the slabs. 3. Usually, the crank bar are minimum 300 millimetres long and the slope or bend on the crank bars (Bent up bars) should remain 1: 10.