I am building a new wheel for my family bike: there will be a kid seat on the back rack over the wheel. I picked up some cheap double butted flat aero spokes (not elliptical but flat). From reading around forums these should be no different to a standard round spoke.
My question is this: is the double butted flat spoke weaker regarding the situation, not road/race but weight carrying?
Safety is important. No I am not looking for speed I got them as they were cheap clearance (Pro-Lite Gavia Aero Spokes).