That depends on how heavy it is.
Steel beams are measured by height and width and weight-per-length
As an example A beam you describe as measured in the UK could be 200mm X 100mm X 30kg/m
12 feet is approx 4m so total beam weight 120kg.
This is just an example and it all depends on the unit weight. If you measure the thickness of the steel then look up steel tables online you should get a pretty good idea.
cost of steel 12''x18' i-beam per linear foot?
99lbs
A 12 inch 25 foot you beam would be between $5 and $8 worth in scrap.
90 lbs
Probably around 45.
How much does a 16 foot 12 inch mdf weigh
You should weigh around 65 to 70 lbs.
130 pounds
you should weigh between 112-125
It doesn't matter as long as you're healthy
They should weigh between 70 and 80 pounds.
That is the average weight. I am 13 and weigh 78 lbs. I am underweight, but not that much