Montana Title 50. Health and Safety § 50-77-102. Temporary floors for protection of workers

(1) It is the duty of an owner, person, or corporation that has the direct and immediate supervision or control of the construction or remodeling of any building having more than three framed floors, whether some or all of the floors are above or below the established street grade, to provide and lay upon the upper side of the joists or girders, or both, of the first floor below the riveters and structural steel setters a plank floor, which must be laid to form a good substantial temporary floor for the protection of employees and all persons engaged above or below or on the temporary floor in the building.

(2) If the permanent floor is in place on the floor required to be planked, a temporary protective floor may not be required.

(3) If the floor or permanent floor of the second floor, any other floor above the second floor, or the roof is being placed previous to the permanent floor immediately below the floor that is being arched or planked, a good substantial temporary floor must be laid on the joists and girders of the next lower floor.

(4) For the purpose of this section, the lowest framed floor in the building is considered the first floor.