Reply by bruc101

For 1/2 inch osb shelves up to 10 inches wide and 48 inches long with 2 corbels. The more wight you use on the shelf the wider you want to make the front support…usually up to 2 inches for this width and length self.
Put a corbel on each end.

-- Bruce http://plans.testsitem3.info http://www.sawmillgirls.com