Can you use a 10*1/4 steel pipe to give more support in construction? like a column?

Answer 1

If concrete filled and fitted with flanges,
it would be called a 'Lalley Column`,
and be considered standard practice.
( Six inches is most common. The concrete
fill adds both strength and rigidity.)
* Threaded flanges will give you a bit of
height adjustment.)

Answer 2

You can use virtually anything as a support, however it is important to have some idea what the load bearing capacity is of the materials you will be using. Obviously the 10-1/4" steel pipe will have a substantial weight capacity, and common sense would tell you that it may be adequate to support the load, however code requirement may demand that you identify the capacity before proceeding. You will also need to make sure that the method of attachment has been approved from the wood to the pipe.

Answer 3

Used for a column should be OK, I had to install some for a project that required me to be able to adjust the height of the column at a later date. We welded a washer and nut together and placed them on the top of the pipe, then we welded a nailing plate to the bolt, this allowed me to spin the nut and adjust up or down as needed. We boxed the pipe in 1 x 4 cedar to hide it, looks like regular post.