I-Shaped Joist Attributes

The I-shaped joist is a truss shaped profile that can more easily accommodate mechanical, plumbing, and HVAC systems (Figure 2). The joist would be fabricated by a continuous rollforming process with punched web openings and closed formed flanges that are mechanically clinched. The chords are pentagonal shaped that provide flat vertical surfaces for attachment to end closures, hangers, and


M. Pandey et al. (eds), Advances in Engineering Structures, Mechanics & Construction, 393-399. © 2006 Springer. Printed in the Netherlands.

brackets (Figure 2). The trapezoidal shaped formed web openings along the length of the joist can accommodate large diameter utility passage within the floor cavity. The trapezoidal web openings are edge stiffened to provide for enhanced shear strength (Figure 3).