We engineer how concrete pieces would be made if the job comes to fruition. We have a letter of intent that allows us to proceed with Engineering Drawings. Should the job never come to fruition, my opinion is we cannot file a lien on the project where we have no tangible personal property. My ultimate question is what should my first furnishing date be when i submit the file to Zlien/Levelset? My opinion is once we have constructed product and ship to the job site. We also construct concrete pieces that are on our property where we have issued a bill of sale to the Owner/GC so we can be paid for such. Should the Owner/GC refuse to pay, do we have a lien claim for these items that have not shipped to the site?