Beam and Slab Spans

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Rakan Ayyoub

March 12, 2024 18:19

Do you need to memorize all the different spans for structural elements? I thought the test didn't rely on memorization, please help here 

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  Garret Feasel, AIA March 13, 2024 18:26

  You do not need to memorize all the spans but do need to know when to use each type of structural member and when. For example, if you need to worry about floor to floor space and are locked in how high the building can go then you may want to use a system that lowers your overall floor to floor height such as concrete compared to steel joists. 

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  yulinpeng December 20, 2024 06:30

  🤞 thinking the exam is about logically making selections on structural systems, so a broad understanding of their characteristics will help picking the right one under the application scenario. Below are what I encountered --

  for mechanical systems and structural system integration: Wood Trusses or Open-Web Joist

  for long span (>60'): Glulam Beam, Long-Span Open-Web Joist (LH, DLH), Steel Rigid Frame

  for short span: perhaps Wood I-Joist, Timber Truss (Heavy Timber Frame, in general), Steel Girder are most appropriate

  for Max floor height: concrete flat slab with column + capital and drop panels

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