This model made in Blender and texture Made by substance painter . Evrything are in qaud . No n gon or triangle. Triangle it while importing it in any game engine

It has only 2724 vertices Face orientatior are ok , I put a render of normal Scale Every floor height 10 feet and those column are 12X14 Inches

Available format -fbx -obj -blend pack file

Texture Resolution 4096X4096 Maps -Base color -Roughness -Normal -Displaement

I put every texture in zip file

Feel free to massage me if something missing