Building Plans Shed Porch Roof. Products%202/48%20Header%20Details/sshot-5.jpg' alt='Roof Symbols Autocad' title='Roof Symbols Autocad' />The full set of house drawings you need and the most commonly used symbols. 3Par Mib S. W001 basic back arrow side W010 flare bevel, both sides W019supplementary concave W028 groove flare V, other side W002 basic fillet, arrow side.