Gambrel roofs provides more storage than traditional sloped roofs. Three different shed lengths are detailed by these professionaly designed and formatted plans -- these sizes are as follows: 12' x 12', 12' x 16', and 12' x 20'. The plan gives the option to build on either a concrete slab, or on a joisted floor. Large-format measured shop drawings detail everything clearly, plus you get a list of the materials you'll need for each size shed, plus instructions from start to finish. You can do it yourself, or hire it out -- either way, the plans can ensure an accurate job. Techniques used in construction are all standard: 2x4's, 8' walls, etc.. This plan has been used successfully by hundreds of fellow woodworkers and as you can see from customer Franz Herrmann's returned photo, there are many options for this useful structure. Really nice design.