4.1. PCSR 10-22-2019 - Laserfiche WebLink

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PRESCRIPTIVE COMPLIANCE METHOD .2. Buildings assigned to Seismic -Design Category A, B or C whose substantial structural damage was not caused by earthquake need not be evalu- ated or rehabilitated for load combinations that include earthquake effects. [B] 404.4 Less than substantial structural damage. For damage less than substantial structural damage, repairs shall be allowed that restore the building to its predamage state, based on material properties and design strengths applicable at the time of original construction. New structural meth the ers and connections used for this repair shall comply detailing provisions of the International Buhlding location. de for new buildings of similar structure, purpose [B] 404.5 Flood hazard areas. For buildings and structures in flood hazard areas established in SSection constitutes the h International Building Code, any rep sub- stantial improvement of the existing structure, as defined in Section 202, shall comply with the flood design requirements for new construction, and all aspects of the existing structure shall be brought into compliance with the requirements for new construction for flood design. For buildings and structures in flood hazard areas estab- lished in Section 1612.3 of the International Building Code, any repairs that do not constitute substantial improvement or repair of substantial damage of the existing structure, as defined in Section 202, are not required to comply with the flood design requirements for new construction. SECTION 405 FIRE ESCAPES [131405.1 Where permitted. Fire escapes shall be permitted only as provided for in Sections 405.1.1 through 405.1.4. [B] 405.1.1 New buildings. fire escapes shall not consti- tute any part of the required means of egress in new build- ings. [B] 405.1.2 EAsting fire escapes. Existing fire escapes shall continue to be accepted as a component in the means of egress in existing buildings only. [B] 405.1.3 New fire escapes. New fire escapes for exist- ing buildings shall be permitted only where exterior stairs cannot be utilized due to lot lines limiting stair size or due to the sidewalks, alleys or roads at grade level. New fire escapes shall not incorporate ladders or access by win- dows. [B] 405.1.4 Limitations. Fire escapes shall comply with this section and shall not constitute more than 50 percent of the required number of exits nor more than 50 percent of the required exit capacity. [B] 405.2 Location. Where located on the front of the build ing and where projecting beyond the building line, the lowes landing shall not be less than 7 feet (2134 mm) or more that 12 feet (3658 mm) above grade, and shall be equipped with counterbalanced stairway to the street. In alleyways and thot oughfares less an feet 144 mm) wide, the clearanc under he lowestllanding shall ) not be less than 12 feet (365 mm). [B] 405.3 Construction. The fire escape shall be designed to support a live load of 100 pounds per square foot (4788 Pa) and shall be constructed of steel or other approved noncom- bustible materials. Fire escapes constructed of wood not less than nominal 2 inches (51 mm) thick are permitted on build- ings of Type V construction.'Walkways and railings located over or supported by combustible roofs in buildings of Type III and IV construction are permitted to be of wood not less than nominal 2 inches (51 mm) thick. 405.4 Dimensions. Existing and replacement fire escape stairs shall meet the minimum width, capacity, riser height, and tread depth as specified in Table 405.4. TABLE 405.4 DIMENSIONS FOR EXISTING AND REPLACEMENT FIRE ESCAPE STAIRS SERVING MORE SERVING 1D FEATURE THAN 10 OR FEWER OCCUPANTS OCCUPANTS 22 inches 18 inches Minimum Width 12 inches Maximum Riser Height 9 inches 9 inches 6 inches Minimum Tread Depth For SI: 1 inch = 25.4 mm. [B] 405.5 Opening protectives. Doors and windows along the fire escape shall be protected with'/4 hour opening protectives. M N M N M N M N M N M N M N M N M N M N M N M N M SECTION 406 GLASS REPLACEMENT [B] 406.1 Conformance. The installation or replacement of ,,i:,cc shall be as required for new installations. SECTION 407 CHANGE OF OCCUPANCY 407.1 Conformance. Changes in the use or occupancy of any building that would place the building in a different division of the same group of occupancy or in a different group of occupancies shall be permitted if such building is made to comply with the requirements of the International Building Code for such division or group of occupancy. Subject to the approval of the building official, the use or occupancy of existing buildings shall be permitted to be changed and the building is allowed to be occupied for purposes in other groups without conforming to all of the requirements of this code for those groups, provided the new or proposed use is equally or less hazardous, based on life and fire risk, than the existing use based on Table 407.1. TABLE 407.1 LIFE SAFETY AND FIRE RISK IELATIVE HAZARD OCCUPANCY CLASSIFICATION 1 H, I-2,1-3 (Highest Hazard) 2 I-4, A-1 3 E, I-1, R-1, R-2, A-2, A-3, A-4 4 B, F-1, R-3, R-4, S-1, M, A-5 5 (Lowest Hazard) F-2, S-2, U 2015 MINNESOTA CONSERVATION CODE FOR nC M N A M N M N M A N M N M N M N M A N M A N M N A M N MA N M, N M N A M N.A M N M., N M N^ M nr" N M., N M N,