If you wish to use a load that is not on the dropdown menu, just select other at the bottom of the list and enter the load details manually.
The steel beam calculator works on any internet enabled device including Macs.
The steel beam calculator will only design beams and not columns/posts.
I'm afraid this is not a services we offer.
The Chartered Association of Building Engineers offer a Basic Structural Design Training Course for Non-Structural Engineers https://www.cbuilde.com/home/.
Structures for Architects by Brian J.B. Gauld.
Those that are competent to do so, in accordance with our terms and conditions