The Titan 600 series features four models - the Titan 630, 640, 660 and 680. They feature one acrylic window and a single door as standard or can be supplied with two windows or double doors 1395mm wide 55 as optional extras. . A full range of accessories is also available for Titan 600 garden sheds including additional windows, benching, shelving, double doors, wooden floors, and alarm. . Siting Titan sheds must be bolted down onto a flat and level concrete base. The recommended thickness of the base is 100mm and the base dimensions are shown in the dimensions table. . Roof style The 630, 640, 660 and 680 have an Apex roof style.