Pillars are usually constructed with apply cement mixtures around highly strenghtened rods. The image could be downloaded as SVG, JPG or as PNG images. This image is available for download in various sizes as mentioned.
The image shows a beam structure placed on a number of pillars. Pillars are supporting structures of the buildings. Pillars could be called the backbones of the buildings, as they carry all the weight of the building. The nodes in the vector image could be edited as per your requirements.