I'm new to Solidworks. I'm just learning the basics. So I'm trying to extrude a T-steel but Extrude feature displaying without Merge check box. The T-steel just had one top sketch profile. It was extruded with merged automatically two tangent lines. I don't want that. I've also searched for answers but couldn't find the best answers. Could anyone help me? Any help will be greatly appreciated. I'm running SW 2013. I also attached file for your review. Excuse for my English.