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Posts by Engineer Eric

link to How to Calculate Balanced Snow Loads per ASCE 7-16

How to Calculate Balanced Snow Loads per ASCE 7-16

A few years back, my group of engineers got a question from the shop floor: "We're seeing the conduits from the ceiling snaking back and forth a lot, is the roof okay?" This was amid some of the...

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link to What is the Modular Ratio in Structural Engineering?

What is the Modular Ratio in Structural Engineering?

While the underlying equations governing structural mechanics may be complex, they can be made much more manageable with a few simplifying assumptions. Most introductory "mechanics of materials"...

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link to What is the Size Factor in Wood Design?

What is the Size Factor in Wood Design?

Traditionally, individual pieces of wood were assigned qualitative ratings by expert "visual graders", based solely on the outward visual appearance. As a piece of wood gets bigger, the chance of a...

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link to What is the Temperature Factor in Wood Design?

What is the Temperature Factor in Wood Design?

Many engineering materials suffer from decreased mechanical properties at elevated temperatures. Aside from the obvious melting problem, even metals that don't rely on heat-treatment processes often...

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link to What is the Wet Service Factor in Wood Design?

What is the Wet Service Factor in Wood Design?

Wood, like soil, is able to hold varying amounts of moisture within its porous structure. Also like soil, the mechanical properties of wood vary based on the moisture content. Totally separate...

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link to What is the Load Duration Factor in Wood Design?

What is the Load Duration Factor in Wood Design?

Unlike almost every other engineering material, the strength of a wood structural member depends on the total duration that the member is subjected to the peak expected load. The implications of...

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About the Author

Eric is a licensed Professional Engineer working as a structural engineer for an architectural facade manufacturer, which straddles the line between structural and mechanical engineering. He holds an MS in Structural Engineering from the University of Minnesota.

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