In this episode, we talk with Jarrad Morris, P.E., RA, NCARB, a structural engineer with experience in architecture and construction, about his expertise in quality control and building dynamics. He highlights the importance of understanding the evolution of quality control in structural engineering and shares best practices for ensuring a high-quality product. Jarrad also explains the concept of stack effect in building design and offers insights into mitigating building movement, noise, and vibration. ***The video version of this episode can be viewed here.*** Engineering Quotes: Here Are Some of the Questions We Ask Jarrad: How has quality control evolved in structural engineering, and what are the current best practices in the field? How important is quality control in structural engineering, and could you explain the significance of the stack effect in building design? How do you handle and come up with innovative solutions for the challenges in your role? How does building movement play a critical role in structures? Are there additional factors contributing to building movement, and in addressing this, do you typically use slosh dampers, mass dampers, or employ alternative methods? How do you handle noise and vibration issues in buildings? What emerging technologies in structural engineering are you excited about, especially in quality control and building dynamics? Do you have advice for aspiring structural engineers, architects, or those interested in construction who are aiming for success and impact in their careers in this field? Here Are Some of the Key Points Discussed About the Evolution of Quality Control in Structural Engineering Practices: Jarrad started with construction basics but switched gears when faced with post-construction issues. Now, he's all about proactive planning, using flexible checklists to avoid last-minute chaos. The aim is for a smooth construction process with thorough preparation and minimal mistakes. In tall buildings, the stack effect, where hot air rises, can cause trouble. Elevator shafts and stairwells unintentionally turn into chimneys, creating issues like doors not closing, elevators malfunctioning, and potential damage to mechanical systems. Old codes worsened this with openings at the top of elevator shafts. The open ground floor introduces cool air, leading to a cascade of problems, affecting everything from functionality to safety. In tall buildings, the stack effect, driven by air buoyancy, becomes a challenge, particularly beyond 40 stories. The suggested approach involves isolating elevator shafts and stairwells, ensuring airtight seals, and avoiding unnecessary heating to mitigate airflow problems. The reverse stack effect in summer is highlighted, cautioning against open windows in multifamily dwellings. Construction may reveal initial airflow, but real issues emerge during the occupation, affecting elevators, doors, and occupant comfort. The taller the building, the more significant the stack effect, making preventive measures crucial, particularly beyond 40 stories. In today's tall glass buildings, specific codes ensure proper ventilation with enough light and air. However, if you open those large windows, it can throw off the carefully planned airflow. Apartments are structured to maintain positive pressure, a rule from these codes to stop unwanted air or smoke from spreading. Opening your window might upset this balance, letting air from other apartments in and causing issues for the ventilation systems in kitchens and bathrooms, disrupting the overall building dynamics governed by these codes. Tall buildings need to move to avoid damage, especially in the wind. The taller they are, the more they sway. Trying to make them too rigid can cause vibrations and iss...