So you need to check it for a combination of loads; both horizontal for bending and compression? Something also sounds a bit off about the information they have provided you. But anyways, as you have the grade of steel and some vertical load, all you need now are your variables (like wind loading) and you should be able to run quick second order analysis on your column. Other considerations: assuming this just being driven, you'll do yourself a favour to check the ground conditions are suitable to support all reactions. Never take anyone's word that it's all "OK".