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+2+2
✉ Envelope #51: Size Effect Factor, AI Deep Research, and Hallucinations
May 09, 2025

✉ Envelope #51: Size Effect Factor, AI Deep Research, and Hallucinations

Andy Lin
Andy Lin
ConcreteConcrete
+2+2
Envelope #47: Bangkok skyscraper collapse
Apr 04, 2025

Envelope #47: Bangkok skyscraper collapse

Andy Lin
Andy Lin
ConcreteConcrete
+1+1
Envelope #30: “I feel like I should know this...” Concrete Refresher
Aug 31, 2023

Envelope #30: “I feel like I should know this...” Concrete Refresher

Andy Lin
Andy Lin
ConcreteConcrete
+2+2
Envelope #27: Changes to the “reduction of development length” that you might not know about
Apr 13, 2023

Envelope #27: Changes to the “reduction of development length” that you might not know about

Andy Lin
Andy Lin
MasonryMasonry
+6+6
Envelope #25: How do you keep track of IBC/CBC “Referenced Standards”?
Mar 16, 2023

Envelope #25: How do you keep track of IBC/CBC “Referenced Standards”?

Andy Lin
Andy Lin
ConcreteConcrete
+2+2
Envelope #24: Turkey earthquake
Mar 02, 2023

Envelope #24: Turkey earthquake

Andy Lin
Andy Lin
ConcreteConcrete
+1+1
Envelope #18: Super-Quick Concrete Beam Check
Aug 25, 2022

Envelope #18: Super-Quick Concrete Beam Check

Andy Lin
Andy Lin
ConcreteConcrete
+1+1
Envelope #16: Do you know the difference between A706 and A615 bars?
Jul 21, 2022

Envelope #16: Do you know the difference between A706 and A615 bars?

Andy Lin
Andy Lin
ConcreteConcrete
+2+2
Envelope #12: Composite decks – two checks that you wouldn’t want to miss
Jun 09, 2022

Envelope #12: Composite decks – two checks that you wouldn’t want to miss

Andy Lin
Andy Lin
ConcreteConcrete
+2+2
Envelope #11: Rule of thumb for concrete thickness (over steel deck) to meet fire rating requirement
Jun 02, 2022

Envelope #11: Rule of thumb for concrete thickness (over steel deck) to meet fire rating requirement

Andy Lin
Andy Lin
ConcreteConcrete
+3+3
Envelope #6: Skinniest tower, ever
Apr 21, 2022

Envelope #6: Skinniest tower, ever

Andy Lin
Andy Lin
MasonryMasonry
+3+3
Envelope #1: Site walls and earthquake
Mar 17, 2022

Envelope #1: Site walls and earthquake

Andy Lin
Andy Lin
Learn about structural engineering in just 5 minutes (once a week) -- brought to you by Andy Lin from Structural Engineer HQ

Back of the Envelope

Learn about structural engineering in just 5 minutes (once a week) -- brought to you by Andy Lin from Structural Engineer HQ

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