I am studying Allowable area increase and reading IBC 2018. I noticed before IBC 2018, section 506.3 is applicable.
506.3 Automatic sprinkler system increase. Where a building is equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1, the building area limitation in Table 503 is permitted to be increased by an additional 200 percent (Is = 2) for buildings with more than one story above grade plane and an additional 300 percent (Is = 3) for buildings with no more than one story above grade plane.
However, in IBC 2018, I cannot find this 300% and 200% increase. Am I supposed to use Table 506.2? In table 506.2, TYPE IIB NS allowable area is 8,500 sq.ft and S1 is 34,000 sq.ft and SM is 25,500 sq.ft. It is more than 300% and 200%. It is actually 400% and 300%.
I'm confused . Can you guys help me with this?
Please sign in to leave a comment.