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K series joists are secondary structural members with an open web system and are used to support floor and roof systems.  They are uniformly loaded and are designed as a simple span member. They are commonly referred to as shortspan joists.
A way of communicating the safe uniformly distributed load-carrying capacities for a K series joist is 30K350/95 where the first number (30) is the nominal joist depth (in inches) at mid span , the 350 represents the total gravity load (dl+ll) PLF and the /95 represents the uplift load (dl-wl) caused by wind.

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