Sloped Joist

I am aware that RAM SS designates a joist as SP, when the slope is greater than 1/2" rise per 12" span.  My question is, for a 2 1/4":12" slope, when the design is given as SP, say 16K4 SP, is the joist designed as 16K4? Or is there any other design I need to perform outside of RAM SS to size these joists? 

Would really appreciate any insights.