never remove a support without consulting a building contractor. it's there for a reason.
when removing a support, you would have to replace or add plies to the existing beam in place, which is a complicated procedure.
We may suggest 20ft (6m) to be the criteria but i insist this is practically too short. Bridge span of 20meters or less may be a good standpoint reference of "short span".
No. Center support brackets are usually only needed for curtain rods spanning more than one standard-width window. In cases where the curtains are very light -- for example sheers or lace -- you may be able to span two windows without a center support.
2X8 set 16 inch on center.
Tsurumi Tsubasa Bridge has a center span of 890m making it the largest bridge in the world!
A 2x10 board can span up to 16 feet without additional support.
Denard Span plays for the Washington Nationals.
How far can 1 by 6 span without support
A 2x10 rafter can typically span up to 16 feet without additional support.
A 2x10 wooden board can span up to 16 feet without any additional support.
A 2x6 board can span up to 9 feet without any additional support.
A double 2x10 beam can typically span up to 12 feet without additional support.
A 2x10 board can span up to 16 feet without support, depending on the type of wood and load it will bear.