Standard end bearing depth of a k-series joist is 2 1/2 in. Thus, the correct option is option B.
What is K-series joist?
As used herein, "Open Web Steel Joists K-Series" refers to open web, parallel chord, load-bearing members made of hot-rolled or cold-formed steel, including cold-formed steel whose yield strength* has been attained through cold working, that are suitable for direct support of floors and roof decks in buildings.
To support the uniformly distributed loads listed in the Standard Load Tables for Open Web Steel Joists, K-Series, attached hereto, K-Series Joists must be designed in accordance with this specification. When trying to choose joists to support uniform plus concentrated loads or other non-uniform loads, specifying professionals face a challenge that the KCS Joist, a K-Series Joist, is designed to address.
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