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    Scott Barber

    Allison, if you have a general understanding of the different structural systems, that should be fine. You should  know the pros and cons of steel, concrete, wood, etc. given certain priorities or requirements to choose a structural system. This mainly falls under PPD, but there's a good amount of overlap between the two exams so it'd be helpful to know for PDD as well. 

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    Jorge De La Rosa

    I am on chapter 5 of BCI book and last night I was wondering the exact same thing. I decided to skip the memorization and just glance at which ones can span the furthest and which ones the least without even looking at the number of feet they can span, but I would LOVE to know this for sure as well. thanks for asking!

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    David Kaplan

    My recommendation is that you have an idea of what systems are "long spanning" and what systems are "short spanning."  I wouldn't take this memorization to the level of detail with regards to the actual spanning dimensions, but you should not that wood glulam beams are a "long spanning structure" and traditional 2 x 10's are a "short spanning structure."  Know the same as well for steel and concrete systems. 

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    Allison Burrell

    That's what I figured, that it is best just to know the spans relative to one another versus actual dimensions. Thanks everyone!

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    Jennifer Schuler

    Hi,

    I have a related question and wondering if you ended up finding any information in your studies which could help. I'm trying to decipher what factors determine when to use a glulam beam vs. a truss for a long span, say over 60', under 150'. I've come across conflicting answers on practice tests. From what I've read between BCI, ASC and AGS, I believe it would depend on whether it's a type I, II, III, IV or V building, occupancy type, cost impacts (I believe a truss would cost less as they use less material) and I'm not sure if the desired roof slope really matters all that much. Any insights would be appreciated!

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    Allison Burrell

    Jennifer - I did not find any information related to that in my studies! I wouldn't get too hung up on such a detailed scenario. I think knowing the basics of the different systems is enough!

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