Where can I find information (decent book/web site) about making beams and box beams....the how's and load/span formulas...
Thanks much
Chuck (CA)
Here is a link to an APA design for plywood box beams used as garage headers. These could be used for other loads as well (pdf file).
http://www.apawood.org/pdfs/managed/Z416.pdf
(http://tinypic.com/x4tuc)