About: http://webisa.webdatacommons.org/37975475

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This can be done using sheet metal, wood, styrofoam blocks, stone or other materials fastened to the ledges to achieve the desired angle.
http://www.w3.org/ns/prov#wasQuotedFrom	cfhs.ca