Fire watch during combustible construction. Section 3314.1 is amended to read as follows: A fire watch shall be provided during nonworking hours for construction that exceeds 40 feet (12 192 mm) in height above the lowest adjacent grade at any point along the building perimeter for new multistory construction with an aggregate area exceeding 20,000 square feet (1858 m2) per story or as required by the Fire Department or Inspections Division. Accessibility For Emergency Vehicles. Section 3314.2 is added to read as follows: "Accessibility for Emergency Vehicles During Construction Operations." At the beginning of construction operations and during construction, the contractor shall provide and maintain at all times a minimum twelve (12) foot wide vehicular access roadway that will allow unimpeded access by fire and emergency rescue vehicles from the improved street to within two hundred (200) feet of the most remote building under construction on the site. The vehicular access roadway surface shall be of a compacted material of stone, blacktop or other suitable material to support a twenty (20) ton vehicle under all weather conditions.