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
That really depends upon the load you need to carry and the material that the beam is made of.
That always depends on what the beam will be carrying. You will need to consult a building contractor to size any beam correctly. IT ALSO DEPEND ON ITS MATERIAL &ALSO HOW MANY STOREY CONSTRUCTION REQUIRED ON THIS
big one
1200 foot propane furnace what size do i need
What size steel I beam do I need to span a 32 feet garage with a floored storage above and no posts
first you need to calculate the load on the entire floor. Different uses mean different loads, you look that up in the building code. Then you calculate how much of the floor is held up by the beam. Then you look up what size of beam to use for the number of pounds per lineal foot. For 1 or 2 family homes you can have a lumber yard do this for you. For commercial construction it has to be done by an architect or an engineer.
Low beam is a 9006 bulb, high beam is a 9005.
250 mm x 400mm
The same size as the pipe it is hooked up to in the well.
8 indian size
That really cannot be answered without looking at the entire set of plans.