Mega Guide to Roofing Beams, Joists, Rafters and Trusses
Joist - Wikipedia
I-beam - Wikipedia
DIY Loft conversion - DIYWiki
Girder - Wikipedia
Rafter - Designing Buildings
Joist - Wikipedia
Steel Beam - Open-Web Joist Dimensions & Drawings
Housebuilding: A Do-It-Yourself Guide, Revised & Expanded: DeCristoforo, R. J., DeCristoforo, Mary: 8601400353646: : Books