Beacons By Design – The structural & optical engineering of lighthouses
Lighthouses are among the most elegant intersections of civil, structural, and optical engineering. Built to guide mariners through hazardous coastlines, shoals, and harbor entrances, they embody a blend of durability, precision, and visibility. While they may appear simple from a distance—a tower with a light—their design involves complex considerations of structural stability, environmental loading, optics, […]
From the Same Barrel: The Engineering Divide Between Gasoline and Diesel Refining
Refining crude oil into finished transportation fuels is, at its core, an exercise in molecular sorting and transformation. From an engineering standpoint, the divergence between producing unleaded gasoline and diesel fuel reflects both the inherent chemistry of crude oil fractions and the performance specifications demanded of spark-ignition versus compression-ignition engines. While both fuels originate from […]
Vapor Intrusion (VI): Engineering Assessment and Mitigation of Subsurface Vapor Migration
Vapor intrusion (VI) is the process by which volatile chemicals migrate from contaminated subsurface media—typically soil or groundwater—into overlying buildings. From an engineering standpoint, vapor intrusion represents a coupled transport problem involving multiphase flow, diffusion, and pressure-driven advection through heterogeneous porous media and across building envelopes. It is most commonly associated with volatile organic compounds […]
Manual J: The Cornerstone of Residential HVAC Design
Manual J is the cornerstone of residential HVAC design in the United States, providing a standardized methodology for calculating building heating and cooling loads. Developed by the Air Conditioning Contractors of America, Manual J establishes a rigorous, physics-based framework that allows engineers and designers to move beyond rule-of-thumb sizing toward precise, data-driven system design. From an […]
A Texan in Iowa on a Cold January Day
David Recht Two weeks ago I visited Des Moines, and I’m glad I did! I live and work in Dallas, and have a couple of clients in Iowa. Along the way, I picked up some insider knowledge about an interesting part of the country. I arrived late on a Monday night at the airport. I […]
Brown Water Advisories in Hawaiʻi: The Civil Engineering Systems Challenge
Brown water advisories in Hawaiʻi represent a uniquely local intersection of hydrology, wastewater infrastructure, and coastal engineering. From a civil engineering perspective, they are not merely public health warnings but visible indicators of watershed-scale system performance—revealing how land use, drainage design, and legacy infrastructure interact under storm loading. Definition and Context A brown water advisory […]
Low-Pressure Systems: The Fundamental Drivers of Rainfall
Low-pressure systems are fundamental drivers of weather, particularly rainfall, across much of the globe. From a meteorological and physical standpoint, these systems represent regions where atmospheric pressure at the surface is lower than that of the surrounding environment. This pressure differential initiates a cascade of processes—air convergence, vertical motion, cooling, condensation, and ultimately precipitation—that govern […]
The Great Pacific Garbage Patch: A Systems-Level Engineering Failure”
The Great Pacific Garbage Patch (GPGP) is not a discrete island of debris, but a dynamic, diffuse accumulation of floating plastics and other anthropogenic materials within the North Pacific subtropical gyre. For engineers, it represents a systems-level failure spanning materials science, product design, waste management infrastructure, and oceanographic transport processes. Understanding the GPGP requires integrating […]
How Pre-Engineered Metal Buildings Are Designed, Built, and Erected
Pre-engineered metal buildings (PEMBs) represent one of the most efficient integrations of structural engineering, manufacturing logistics, and field erection practices in modern construction. Widely used for warehouses, distribution centers, manufacturing plants, aircraft hangars, retail centers, and even churches and schools, PEMBs are engineered as complete systems rather than as collections of discrete structural components. Their […]
How the Telecommunications Act of 1996 Rewired America’s Physical Infrastructure
The Telecommunications Act of 1996 represented the most sweeping overhaul of U.S. communications law since 1934. While it is often discussed in terms of deregulation, competition, and market structure, its most durable legacy may lie not in regulatory theory, but in concrete, steel, glass, and fiber. The Act fundamentally reshaped the incentives governing how telecommunications […]