5

It's definitely for a future bathroom. One of the 1.5" is going to be your vanity drain. Usually there's a 2" under the slab that you can bust out of install a shower or bathtub. The 3" is definitely for a toilet. One of the 1.5" pipes is going to be your vent.


3

The guide to the 2021 IRC code regarding the ceiling height for the basement is provided below: New Construction: According to the IRC (International Residential Code), that basement ceiling height requirements for any habitable basement space, laundry rooms, toilet rooms, bathrooms, or corridors must meet a minimum standard height of 7 feet 0 inches in new ...


2

The Code requires a minimum ceiling height of 7’-0” for habitable spaces, unless 1) it’s a slopped ceiling, 2) basement remodel, 3) bathroom or shower. (See R305.1) Slopped ceilings shall have at least 50% with at least 7’ and slope down to no more than 5’. Basements can have 6’-8” ceilings in non-habitable spaces. (Habitable spaces are for living, ...


1

That rust looks very mild, even near the floor where I'd expect it to be the worst. I'd have no concerns about wiping it down and spraying it with a primer designed to handle rust. You probably wouldn't need to do much sanding unless you plan to leave it exposed and want it smooth. Even then I'd consider a textured paint.


1

Use the rest of the house as a guide. Add up the floor areas (example 1400 square feet) and add up all the return grille openings (example 7 grilles with total 14 sq ft,) In this example there is 1 sq ft return grille area per 100 sq ft floor area. So in this example your basement office return grille would be 1.4 square feet. A 6-inch round duct would be ...


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