About: http://webisa.webdatacommons.org/342017193

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	Although for small buildings angles as high as 45?? have been used, this is not recommended for school buildings where the truss would be likely to need to have a greater span than for some other types of building such as houses.
http://www.w3.org/ns/prov#wasQuotedFrom	howtopedia.org