Posted 2/23/2013 15:03 (#2920533 - in reply to #2920509) Subject: Good explaination crow
MI
Yup! there are many things in everyday life that show this...... trusses, steel joist, lattice boom cranes, even my old Link-Belt squirt boom had cutouts in the sides of the boom. A lot of flat bed semi trailers have the web cutouts to reduce weight.