ap and Rp for steel trellis?

[awa5114]

I am designing a steel trellis and was instructed by our principal engineer to use ASCE 7 Chapter 13 to determine the seismic loads. I am looking at Table 13.5-1 (Coefficients for Architectural components), but I am not sure what I should be using for ap and Rp. It doesnt seem like any of the categories apply. Somebody please help?

 

[sandman21]

Should fall under chapter 12 or 15, cantilever column. If you want to use ch 13, you would fall under section 13.1.5, Rp is equal to the R listed in ch 15 and an ap from footnote a of table 13.5-1

 

[wannabeSE]

A trellis is not necessarily a freestanding structure. If it is supported on two ends (simply supported) similar to a ceiling or interior partition, I would use ap=1.5 and Rp=2.5. If it cantilevers, I would use ap = 2.5 and Rp = 2.5 (like cantilever interior nonstructural walls).