About: http://webisa.webdatacommons.org/256524922

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	Also, any suitable material, such as aluminum or a desired alloy can be used if desired and the size of the components and the number of bracing members used will vary depending on the strength of the material selected.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com