Studrails in Post-Tensioned Slabs – Considerations for Design, Manufacturing and Installation-Studrails in Post-Tensioned Slabs – Considerations for Design, Manufacturing and Installation

Video Transcription

Video Summary

The Post-Tensioning Institute’s August webinar focused on stud rails—a critical material used for punching shear reinforcement in thin post-tensioned slabs. Hosted by Kyle Boyd and presented by Brandon Brower, VP of JSW Stud Rails, the session covered design, manufacturing, installation, and quality assurance of stud rails.<br /><br />Brandon introduced stud rails’ significance in reinforcing slab-column connections to prevent punching shear failure, likening them to “snowshoes” distributing loads. He discussed the evolution of drawn arc stud welding, the typical manufacturing methods (cold and hot forging), and the critical specifications from ACI, ASTM, AWS, and ICC ES codes. Emphasis was placed on ICC ES accreditation as key for quality assurance, ensuring manufacturers meet rigorous standards in material strength and weld integrity.<br /><br />Different types of shear studs were covered: the traditional Nelson-type and the punching shear resistor (PSR) studs, available in cold or hot forged versions. Design considerations include uniform stud spacing and heights, managing stepped or sloped slab edges, and recently introduced “piggybacking” provisions to accommodate longer studs per updated ACI 318-19 code. Brandon highlighted challenges in manufacturing, installation tolerances, and addressing field adjustments or conflicts with MEP penetrations.<br /><br />Various project examples demonstrated complex geometries and applications, including high-rises, bubble deck slabs, and foundation rails. Installation best practices were reviewed, stressing proper placement, concrete compaction, and clearance near openings. Post-manufacturing options such as galvanizing and tools like chairs for secure installation were also discussed.<br /><br />The webinar concluded with a Q&A notice and a preview of upcoming PTI webinars on prestress rock anchors, slab-on-ground performance, and AI use in PT design. Overall, the session provided a comprehensive overview of stud rails to enhance cost-effective, code-compliant post-tensioned slab design and construction.

Keywords

Post-Tensioning Institute

stud rails

punching shear reinforcement

post-tensioned slabs

drawn arc stud welding

ACI 318-19 code

ICC ES accreditation

cold and hot forging

punching shear resistor studs

installation best practices