ASCE 7 Least Horizontal Dimension – Minimum Building Width

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From ASCE 7 (ASCE 7-22,16, 10 & previous standards):


The “Least Horizontal Dimension” can be taken as the shortest possible distance that can be taken between two parallel lines that fully encompass the building

The Least Horizontal Dimension is further demonstrated as follows:

Where ‘B’ is the Least Horizontal Dimension.


For further reference, see our article on ASCE 7 Wall Zones Explained.


Last Update: February 15, 2024  

March 17, 2021  Codes & Standards  
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