>>14387702this happened to a plaza building constructed after the year 2000 in my town. eventually dunkin donuts leased out the corner unit and put a drive thru in there. i worked at a shop in the building and eventually they had to sister each rafter with a steel composite rafter because the floors were bouncing and falling apart.
the new international code book that almost all states have starting using to appease the UN, enforcing on their 'legal residents', states that for a given run of beam span it can only deflect one sixteenth of an inch under load. if it deflects more than that then the beam needs to be sized up to another tier of dimensional lumber, ie a 2x8 becomes a 2x10 until your load table and span tables match, and you can draw a direct load path down to the foundation and the ground.
if you can do that, then you didn't draw it wrong. if it's level, square and plumb, then you didn't build it wrong. that's the problem with OSB joists, the gllue being amazing doesn't matter. all wood glue is that amazing. there are youtube channels that load test finger joints and dovetail joints, and modern wood glue is actually stronger than the hardwood grains in an oak dovetail joint. that doesn't stop the piece from bending or warping or bowing under load, and that's what you are looking to prevent.
until you can prove to the UN trained building inspector that your building can do this for each beam span, you are 'building at risk'. this means in those states the inspector can ask you to rip out any beam and replace it until they approve your building. you can go bankrupt waiting for approval for years, juts rebuilding the same property. for examples of this and how it ruins companies, look at Titan Construction in new england. the principal investors are all owning the cul de sacs they built because the new england states won't approve their houses even though they were built over code ten years ago.
