Project Pic and Question

[SgtRock]

Below is a pretty simple railing I made for my Dad's wheelchair ramp. Now that I have him sold on the idea, I want to finish the rest of the ramp. This one is a bit different from what I have planned for the rest. The middle rail on this is 1/8" x 2" plate and the remainder is 1" 14 ga square tube. The mount is 1 1/4" 14 ga on 1/8" plate. The railing can be lifted out of the mounts pretty easily, although it is a tight fit. I took a die grinder to knock the weld down on the inside of the 1 1/4" tube. The 1" tube was notched on each side a 1/2" with the angle grinder and the ends bent in a bit with the hammer. I then welded the gap remaining and ground them to a smooth taper to make it easy to start it into the mount.

The rest of the railing will not be removable. This piece was removable in the event that something needs to be moved in/out of the kitchen. The remainder will use 1" sq. tube for the middle rail instead of the 1/8" bar.

My question is this - I've seen software for sale that is used to design railings. Has anyone used any of these tools and what is your opinion? I'm looking at it primarily to validate materials lists, dimensions, and angles.

Thanks,
Eric