Can a D-Beam be moment connected to a flange of the steel column?
NO. The D-Beam should not be used in a moment connection.9. I am a structural engineer and have a job where some floors will be topped with 2″ of concrete and other floors will simply have a light weight leveling material over the plank. I am satisfied with my calculations and see that I can use the DB 8 x 42 in both conditions. I want the economy of specifying the same DB shape throughout the job. Your design guide suggests I use the DB 9s with 2″ concrete topping. Must I use the DB 9?No. As engineer of record it is your decision what is the most economical solution for your client. We offer the DB 9 for a topped job because it is deeper (stiffer). Notice; the DB 9 x 41 is one pound per foot lighter, and of course the bottom flange is minimal and the top flange is concealed in the topping. Remember, “When concrete topping is used, attain specified strength of grout prior to placement”.
