Leveling should have been done on the floor and walls. By the time you get to the ridge you should be able to measure and get it level.
I'm afraid we do not have all the information needed to amswer your question. Your safety is important, and you would be better served to discuss your needs with a engineer that can look at the whole picture.
Roof Line 30 Foot Span
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hand span, arm span, foot, cubit
The Blue Ridge Mountains, or Smokies, are located in North America. They span several states, including Tennessee and Kentucky.
Span/load beam questions really cannot be answered. You will need to have the plans looked at by a engineer. At the very least the lumber yard selling the beam may have an on-staff engineer to have a look at it.
A foot span is a term used in the roofing industry to calculate the area of a roof. It is necessary to calculate how many shingles per foot. This measurement will vary depending on the type of shingles used.
A span is not a standard measure, a foot is. So there is no definitive answer.
You can find the South Pole at 90 degrees S, a single GPS point.
Tell us the size of the span, and what it is made from, and we may be able to get you an estimate. A single 6 foot board is 5 seconds, a 300 foot long concrete and steel span takes a little longer.
a big spider that has a leg span of 1 foot
A 2x8 refers to a 2 inch by 8 foot piece of wood. The span of a 2x8 is 8 feet.