fire 138Traditionally, structural fire protection is prescribed for structures after they have been optimised for ambient desn loads such as gravity, wind, and seismic, among others. This century-oldI 15 N HWY 138. Fire Detail. Name: I 15 N HWY 138: Incident Type Category: Wildfire: Fire Cause: Undetermined: Fire Discovery Date Time: July 15, 2025, 4:26 p.m.