Existing and proposed mezzanines in live/work quarters shall be constructed and supported in accordance with the structural requirements of the building code except that they may be attached to the structural frame of the building for support without concern for the effect on the foundations. A guardrail at least thirty-six (36) inches in height shall be provided. Guardrail for storage portions for lofts may be removable for access. Mezzanines and their supports (if not a separation wall) raised floors, raised platforms, bleachers, seating platforms, ladders, stairs, guardrails, posts, enclosures, partitions may be of wood construction and will not change the classification of the building as Type I. (Prior code § 9.29.1309)