I weigh the frame and fork whenever I restore a bike. I have weighed all types and quality levels.
In general, high quality steel frames weigh from 4 to 4.5 lbs with larger frames weighing up to 5 lbs. The lightest steel frame I ever weighed was about 4 lb.
Average bike boom non cromo frames weigh about 6 lbs and bikes like the schwinn varsity weigh over 9 lbs (total weight 36.6 lb) .
The frame is only one part of the complete package and it is often possible to lighten the bike significantly by replacing heavy steel components with aluminum.
The above mentioned schwinn ended up at 32.6 pounds and could have lost another pound if I had replaced the ashtabula crank with an aluminum version.