They concluded that the effects of increasing shear span on the shear strength of I-joists with rectangular holes appear to be minimal and that a web stiffener is effective in shifting the critical stress from the web hole to the bottom flange at the point of maximum moment.
Web stiffeners were installed at the reaction and load points.
Column web stiffeners do not affect characteristics of the connection area.
Subsequent to calculations, it may be noted that the transverse column web stiffeners increase the initial rotational stiffness and the design moment resistance of the joints.
(2) Parametric case of the web stiffening using web stiffeners shows a simple possibility to increase the web and joint stiffness and strength.
Same joint with column web stiffeners is ideally rigid, because the joint has no components where elastic deformations occur.