Standard 90 Degree Hook Rebar

Specimens 90 and 180 degree standard reinforcing hooks were placed at varying angles to compare the angle of tilt and to compare the two hook types.

Standard 90 degree hook rebar.

Development length for reinforcement. This rebar is grade 40 and has minimum yield strength of 40 000 psi. Stirrup and tie hooks have a sub definition for 135 degree bends. Aci standard hooks for stirrups.

Either the 90 hook with an extension of 12 bar diameters 12db at the free end or the 180 hook with an extension of 4 bar diameters 4db but not less. When reinforcing bars are bent caution must for the different bar sizes and for the various be exercised to ensure the bends are not too sharp. This rebar is bent at a 1 ft. Astm standard reinforcing bars bar size designation nominal dimensions.

Get vip membership now. Construct each framing system has been designed based upon four typical live loads 1 9 kpa 2 4 kpa 2 9 kpa 4 8 kpa and a superimposed dead load of 1 0 kpa. Twelve single bar specimens and twelve multiple bar specimens each containing either no. Tek 12 6 splices development and standard hooks for concrete masonry ref.

The 90 degree hooks with 12 bar diameter extensions are what we usually see drawn in typical details. 16 bar and smaller 90 degree bend plus 6db extension at free end of bar. Bent at 90 angle. Allowable stress design building codes confinement rein forcement development embedment joint reinforcement reinforcing bars.

90 degree bend plus 12db extension at free end of bar. A stirrup hook is further qualified in 318 11 section 12 13 2 1 as establishing the required anchorage when said hook encloses a longitudinal bar. Details of the standard 90 and 180 hooks specified in sections 7 1 and 7 2 of the aci code. 3 14 12 4d 12 6 keywords.

Show details of the standard 90 and 180 hooks. 7 covers these requirements based on the 2003 and 2006 editions of the ibc. 6d d d d d d d d h h detailin g dimension detailin g dimension a or g hoo k a or g hook a or g 6d for 3 4 5 12d for 6 7 8 6d 3 min. Rebar is designed to help provide expansion and contraction support for concrete.

These bending details are shown if too sharp a bend is put into the bars they may in figure 7 12 there are many different types of crack or be weakened.