La. Public Health and Safety § 40:1679
All contractors and owners, lessees and subcontractors, when constructing buildings where the plans and specifications require the floors to be arched between the beams or where the floors are fireproof material or brick work, shall complete the flooring or filling in as the building progresses, to not less than within three tiers or beams below and on which the iron work is being erected. If the plans or specifications do not require the filling in between the beams with brick or fireproof material, the contractor shall lay in the under flooring or a safe temporary floor, on each story as the building progresses to not less than within two stories of the floor below, to which the building has been erected and where double floors are not to be used shall keep planks over the floor, to two stories of the floor below the story where the work is being performed, and if the floor beams are not of iron or steel, the contractor for the iron or steel work in the course of construction or the owner shall thoroughly plank over the entire tier of iron or steel beams, on which the structural iron or steel work is being erected, except such places as are necessary for the proper construction of the iron or steel work, and for raising or lowering of material to be used on the building. All openings in the floor shall be railed as required by R.S. 40:1677.
La. Public Health and Safety § 40:1679