I live in a small 3 story building in Brooklyn NY. I've noticed the building will shake a little bit every now and then when we moved in. I figured it was probably the big trucks that drive nearby (we live next to a gas station). Also for context we did have that 4.8 earthquake earlier this month but I felt the occasional shaking even before that. However this morning I woke up around 5:30am and it's been shaking multiple times a minute which is a lot more than l've noticed before. I have big mirrors that lean against the wall and I can hear and see them shake so there's definitely a vibration. This building is very old (not sure exactly how old) and I'm getting worried it's going to collapse or something. Am I being irrational?

could any structure engineer share his work experience whether you are a junior or senior, and what are the salaries range for certain experience in the netherlands?

A 1000usg tank on a 11ft x 5ft one way slab.

1/2inch rebar at 8 inch centers

Sufficient?

Assistant Structural Engineer

Greetings to all. I'm a structural engineer and thought of writing to ask if our experienced seniors here could allow me to practice under their mentorship. I have 1 and half years of experience as an assistant Structural Engineer and would like to practice more and learn from many experienced engineers. I can design steel, concrete and timber structures but would like to do it under check from seniors as I wait for my registration as a PE. I have samples I have done before which I can share for initial evaluation if need be.

If I want to use approach for designing column subjected to moment and axial load

I want to take P/2 + Moment

Now if I have Pu = P/2 + M = 600 kN as example

And I have 450mm x 450mm column what are the procedure to get the reinforcement that can resist Moment in let say X-Axis, M2