In this episode, we take a deep dive into mast frames a hybrid seismic system that challenges the traditional boundaries between elastic and energy‑dissipating components. Using the Samuel Merritt University project as a case study, we unpack why the design team stepped away from conventional BRB‑only frames and moment‑frame/dual systems, and instead embraced a BRBM (Buckling‑Restrained Brace + Mast) approach.

We explore how mast frames redistribute stiffness, improve drift control, and preserve architectural openness in ways that standard systems struggle to match. From nonlinear response history analysis to capacity design of mast members, we walk through the technical decisions that shaped the system. We also get into the practical realities detailing strategies that allow the mast to rock, base connections that handle massive overturning forces, and the construction challenges of erecting a tall, stiff truss inside a transparent building.

Finally, we zoom out to discuss where mast frames fit in the future of seismic design. Will hybrid systems like BRBM become more common in dense urban environments? How might codes evolve to better capture their behavior? And what lessons should engineers carry forward before attempting a similar system on their own project?

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In this episode, we break down the landmark introduction of Chapter 32 in ASCE 7-22. For the first time, tornado-resistant design moves from a voluntary recommendation to a codified requirement for specific Risk Categories. We explore the probabilistic shift in how we view tornado hazards and the practical hurdles of implementing these loads in the design.

Links & Resources:

StructurEd (our free study tool): TheEngineeringPodcast.com/StructurEd

Structural Trivia:

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Reach out to us:

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Sponsor:

This episode is sponsored by NEXT Insurance; affordable, engineer-friendly liability coverage starting at just $29/month, designed to give structural engineers the protection they need with zero hassle. Go to NextInsurance.com/sepodcast and get a free quote today!

In Episode 104, we dig into the world beneath our buildings, foundation systems. From shallow footings to deep foundations, we explore how engineers match soil behavior, structural demands, and constructability to choose the right system for the job.

We break down the fundamentals of spread footings, mats, piles, drilled shafts, and ground‑improvement‑based systems. You'll hear how load paths shift depending on soil conditions, why "simple" footings aren't always simple, and what engineers should watch for when coordinating with geotechnical reports, contractors, and owners.

Tune in to hear how foundation systems balance performance, risk, and practicality — and why the most important part of a building is often the part no one ever sees.

Structural Trivia:

Sign up for our structural trivia! A quick email mid-week will keep you sharp (FYI-Survey Monkey is often re-directed to the spam folder).

Reach out to us:

TheEngineeringPodcast.com

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Sponsor:

This episode is sponsored by NEXT Insurance; affordable, engineer-friendly liability coverage starting at just $29/month, designed to give structural engineers the protection they need with zero hassle. Go to NextInsurance.com/sepodcast and get a free quote today!