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The fixture unit method (in some places called fixture value method) was developed by Roy B. Hunter from the US Bureau of Standards, based on research conducted by Hunter in the 1920s and 30s (Hunter, 1940). Every fixture in a...
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by Tom Walski

They are nonlinear, partial differential equations which are about the worst kinds of equations to solve. About the only things that can make them worse are changes in state (e.g. steam condensing) or non-Newtonian fluids (e.g. mudflows). Numerous researchers have...
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by Tom Walski

The problem was that the people who developed the data underlying the GIS/CAD (I’ll call it GIS in this blog) used to build the model were not careful in how they laid out intersections. They would run the same pipe...
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by Tom Walski

When I would walk into an engineering office (before the pandemic), I would be concerned by the lack of books on the shelves. I’m told that everything you need these days is on the internet....
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by Tom Walski

The exact right-of-way for a pipe or land acquisition for a tank or pump station is not generally considered in explicitly in master planning but can have a significant effect on costs. Costs can vary dramatically and are not simply...
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by Tom Walski

This blog series attempts to present some important considerations in system design that are important but generally are overlooked in schools. Experienced engineers will be familiar with these issues, but inexperienced engineers run into them frequently until they learn....
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by Tom Walski

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