• ideCAD automatically designs beam-column joints in accordance with ACI 318-19.


Notation

h = overall thickness, height, or depth of member, in.


The shear resulting from moment created by gravity load, wind, earthquake or other lateral forces at beam-column joints should be considered in the design of the joint.

According to ACI 15.2.6, if a column extension provides continuity through a beam-colum joint in the direction of joint shear, it considered shall satisfy the following two conditions:

  • The column extends above the joint at least one column depth, h, measured in the direction of joint shear considered.

  • Longitudinal and transverse reinforcement from the column below the joint is continued through the extension.

According to ACI 15.2.7, if a beam extension provides continuity through a beam-colum joint in the direction of joint shear, it considered shall satisfy the following two conditions:

  • The beam extends at least one beam depth h beyond the joint face.

  • Longitudinal and transverse reinforcement from the beam on the opposite side of the joint is continued through the extension.

According to ACI 15.2.8, for a beam-colum joint to be considered confined for the direction of joint shear, two transverse beams should be satisfed the following three conditions:

  • Width of each transverse beam is at least three-quarters of the width of the column face into which the beam frames

  • Transverse beams extend at least one beam depth h beyond the joint faces

  • Transverse beams contain at least two continuous top and bottom bars satisfying ACI 9.6.1.2 and No. 3 or larger stirrups satisfying ACI 9.6.3.4 and 9.7.6.2.2.