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1

If you use machine bolts and washers on the side that doesn’t line up with your joists (through the 3/4 board ) that should provide the strength you need.


2

This shouldn't be a big ordeal - just get a 2x6 and cut it so that it spans at least 2 joists when oriented in the direction you want the pullup bar (perpendicular). Use lag bolts to secure the 2x6 to the joists, then use more lag bolts to secure the pullup bar to your 2x6. If that seems to have too much flex for you (I doubt it), you can always double up ...


2

I doubt the wall between the living and dining area is structural. It appears you have a one-story (in that area) living space with roof trusses spanning 26’ from front to back of your house indicating no load don that wall. Things to consider: I’d go down in the basement below that wall and see if there is any posts coming down through the wall above, ...


3

Unless you are happy betting your house (which you will be) the correct answer is to pay a local licensed professional engineer to inspect and be sure. The cost is a small fraction of "Whoops, I broke my house because some folks on the internet said..." They can also tell you what needs to be done if it is load-bearing and you still want to remove it. You ...


0

You can answer this sort of question with basic engineering and on-line data and calculators. Here's a calculator for beam deflection, assuming the beam is firmly fixed in concrete at the bottom. The Young's Modulus for steel is 200Gpa The moment of inertia for a 0.1m square beam is 0.000008333 (a hollow beam will be less stiff than a solid one, but not ...


1

You could have a tremendous amount of dead weight on the platform without any trouble -- it's the liveliness of the load that causes problems. A single person weighing under 200 pounds can cause some sway in a 20,000+ pound bus by standing in the aisle and throwing his weight about, for instance. Consider the activities that will occur up there. Have you ...


0

If you dig the posts 3' into the ground and concrete them in, this will be a fine solution. If it was a deck with a lot of movement on it, or if you wanted to hunt from the platform, I would say that bracing would be mandatory, but for your use case, the steel legs should be very sturdy. There might be a little wiggle at the top when you walk, but I think ...


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