criteria for localized floor deflection

[PSUengineer1]

Hello Engineers.

I have a 5-story condo building (no drawings, no site visit). I don't know what the floor framing is. Floor framing reportedly spans 24 feet. At the back side of one of the units I have a localized floor deflection of 1/2 inch over the last 4 feet from the sliding glass door (enough to put bubble out of lines on 4-foot level). The floor levels out away from the slider.

I think the problem is local to where the hardwood flooring meets the sliding glass door. The underlayment is probably over top the door flashing slightly, resulting in localized deflection. The engineer of record already checked (with laser) and ruled out deflection of the floor framing.

My question: Is there a structural performance standard that specifically addresses uneven or unlevel floors (outside of ACI and say floor covering manufacturer standards)? My gut tells me that the floor construction is wood-framed. If there is a standard, what is its name and what is the performance requirement for a wood-framed floor (i.e., floor shall not be more than 1/4" out of level over 32")?

Thank you.

 

[phamENG]

Are you referring to construction tolerance for wood framing? No enforceable standard that I'm aware of unless it was specified in the contract documents. Other than that, you have flatness requirements from flooring manufacturers. Carpet doesn't care, laminates and tile have more stringent requirements to prevent damage to the surface.

How old is the building?

 

[XR250]

Could be moisture damage. Pretty typical near exterior doors.