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About this event

This session is part of the Seismic Retrofit Strategies for Existing Structures webinar series, a technical series spotlighting seismic retrofit design challenges across URM and precast systems jointly hosted by Calcs.com and PYTHON Fixings.

In this webinar, join Robert Hudson, PYTHON Fixings VP of Engineering, on Tuesday, September 23, 2025 from 10 am to 11 am New Zealand Time (NZT) to examine the complex issue of anchoring to, and retrofitting of, hollowcore floors.

Drawing from experimental research and current design practice, this session will address how anchors actually behave in this material under seismic loads, the applicability and code requirements around use of C2 capacities, and the latest approaches being used to minimize the cost associated with seismically retrofitting these units. 

Ideal for structural engineers, peer reviewers, and consultants working on commercial and institutional buildings with precast flooring systems.

All registered attendees will receive a recording of the webinar after the event.

In this webinar, we will cover:

• Summary of current state of hollowcore retrofit requirements in NZ.
• Experimental research investigating the use of mechanical anchors as supplementary shear reinforcement for hollowcore floor units.
• Anchorage techniques for hollowcore floors, benefits and limitations.
• "C2 Capacities" - Use and applicability in the context of anchorage to hollowcore floors for seismic retrofit and services connections.

The session will help engineers make informed choices around anchorage to, and seismic seismic retrofitting of, hollowcore systems.