CODES

ADOPTS WITH AMENDMENTS:

International Existing Building Code 2015 (IEBC 2015)

Heads up: There are no suggested sections in this chapter.
Heads up: There are no amended sections in this chapter.

301.1 General

AMENDMENT
This section has been amended at the state or city level.
The repair, alteration, change of occupancy, addition or relocation of all existing buildings shall comply with one of the methods listed in Sections 301.1.1 through 301.1.3 as selected by the applicant. Sections 301.1.1 through 301.1.3 shall not be applied in combination with each other. Where this code requires consideration of the seismic force-resisting system of an existing building subject to repair, alteration, change of occupancy, addition or relocation of existing buildings, the seismic evaluation and design shall be based on Section 301.1.4 regardless of which compliance method is used.
Exception: Subject to the approval of the code official, alterations complying with the laws in existence at the time the building or the affected portion of the building was built shall be considered in compliance with the provisions of this code unless the building is undergoing more than a limited structural alteration as defined in Section 907.4.4. New structural members added as part of the alteration shall comply with the International Building Code. Alterations of existing buildings in flood hazard areas shall comply with Section 701.3.


Automatic sprinkler systems may be required by M.G.L. c. 148, §§ 26A, 26A1/2, 26G, 26G1/2, 26H, or 26I; or by M.G.L. c. 272, §§ 86 through 86D. See sections 101.4.5 and 903.2 of 780 CMR for additional guidance.
Repairs, alterations, additions and changes of occupancy complying with Chapter 4 of this code in buildings complying with the International Fire Code shall be considered in compliance with the provisions of this code.
Repairs, alterations, additions, changes in occupancy and relocated buildings complying with the applicable requirements of Chapters 5 through 13 of this code shall be considered in compliance with the provisions of this code.
Repairs, alterations, additions, changes in occupancy and relocated buildings complying with Chapter 14 of this code shall be considered in compliance with the provisions of this code.
The seismic evaluation and design shall be based on the procedures specified in the International Building Code or ASCE 41. The procedures contained in Appendix A of this code shall be permitted to be used as specified in Section 301.1.4.2.
Where compliance with the seismic design provisions of the International Building Code is required, the criteria shall be in accordance with one of the following:
  1. One-hundred percent of the values in the International Building Code. Where the existing seismic force-resisting system is a type that can be designated as "Ordinary," values of R, Ω0and Cd used for analysis in accordance with Chapter 16 of the International Building Code shall be those specified for structural systems classified as "Ordinary" in accordance with Table 12.2-1 of ASCE 7, unless it can be demonstrated that the structural system will provide performance equivalent to that of a "Detailed," "Intermediate" or "Special" system.
  2. ASCE 41, using a Tier 3 procedure and the two-level performance objective in Table 301.1.4.1 for the applicable risk category.
[BS] TABLE 301.1.4.1 PERFORMANCE OBJECTIVES FOR USE IN ASCE 41 FOR COMPLIANCE WITH INTERNATIONAL BUILDING CODE-LEVEL SEISMIC FORCES

RISK CATEGORY
(Based on IBC Table 1604.5)
STRUCTURAL PERFORMANCE LEVEL FOR USE
WITH BSE-1N EARTHQUAKE HAZARD LEVEL
STRUCTURAL PERFORMANCE LEVEL FOR USE
WITH BSE-2N EARTHQUAKE HAZARD LEVEL
I Life Safety (S-3) Collapse Prevention (S-5)
II Life Safety (S-3) Collapse Prevention (S-5)
III Damage Control (S-2) Limited Safety (S-4)
IV Immediate Occupancy (S-1) Life Safety (S-3)

301.1.4.2 Compliance With Reduced International Building Code-Level Seismic Forces

AMENDMENT
This section has been amended at the state or city level.
Where seismic evaluation and design is permitted to meet reduced International Building Code seismic force levels, the criteria used shall be in accordance with one of the following:
  1. The International Building Code using 75 percent of the prescribed forces. Values of R, Ω0 and Cd used for analysis shall be as specified in Section 301.1.4.1 of this code.
    Exceptions:
    1. 780 CMR using 50% of prescribed forces when directed here by section 807.5, provided there is no substantial structural alteration, as defined by 907.4.2.
    2. 780 CMR using either:
      1. 50% of prescribed forces when directed here by section 1103.3.1 and when the vertical addition increases the building area less than or equal to 30%; or
      2. 75% of prescribed forces when directed here by section 1103.3.1 and when the vertical addition increases the building area more than 30% but less than 50%.
  2. Structures or portions of structures that comply with the requirements of the applicable chapter in Appendix A as specified in Items 2.1 through 2.5 and subject to the limitations of the respective Appendix A chapters shall be deemed to comply with this section.
    1. The seismic evaluation and design of unreinforced masonry bearing wall buildings in Risk Category I or II are permitted to be based on the procedures specified in Appendix Chapter A1.
    2. Seismic evaluation and design of the wall anchorage system in reinforced concrete and reinforced masonry wall buildings with flexible diaphragms in Risk Category I or II are permitted to be based on the procedures specified in Chapter A2.
    3. Seismic evaluation and design of cripple walls and sill plate anchorage in residential buildings of light-frame wood construction in Risk Category I or II are permitted to be based on the procedures specified in Chapter A3.
    4. Seismic evaluation and design of soft, weak, or open-front wall conditions in multiunit residential buildings of wood construction in Risk Category I or II are permitted to be based on the procedures specified in Chapter A4.
    5. Seismic evaluation and design of concrete buildings assigned to Risk Category I, II or III are permitted to be based on the procedures specified in Chapter A5.
  3. ASCE 41, using the performance objective in Table 301.1.4.2 for the applicable risk category.
[BS] TABLE 301.1.4.2 PERFORMANCE OBJECTIVES FOR USE IN ASCE 41 FOR COMPLIANCE WITH REDUCED INTERNATIONAL BUILDING CODE-LEVEL SEISMIC FORCES
RISK CATEGORY
(Based on IBC Table 1604.5)
STRUCTURAL PERFORMANCE LEVEL FOR USE WITH BSE-1E EARTHQUAKE HAZARD LEVEL
I Life Safety (S-3)
II Life Safety (S-3)
III Damage Control (S-2). See Note a
IV Immediate Occupancy (S-1)

  1. Tier 1 evaluation at the Damage Control performance level shall use the Tier 1 Life Safety checklists and Tier 1 Quick Check provisions midway between those specified for Life Safety and Immediate Occupancy performance.
The provisions of Section 302 apply to all alterations, repairs, additions, relocations of structures and changes of occupancy regardless of compliance method.
Alterations, repairs, additions and changes of occupancy to, or relocation of, existing buildings and structures shall comply with the provisions for alterations, repairs, additions and changes of occupancy or relocation, respectively, in this code and the International Energy Conservation Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, International Plumbing Code, International Property Maintenance Code, International Private Sewage Disposal Code, International Residential Code and NFPA 70. Where provisions of the other codes conflict with provisions of this code, the provisions of this code shall take precedence.
Materials already in use in a building in compliance with requirements or approvals in effect at the time of their erection or installation shall be permitted to remain in use unless determined by the building official to be unsafe.
Except as otherwise required or permitted by this code, materials permitted by the applicable code for new construction shall be used. Like materials shall be permitted for repairs and alterations, provided no unsafe condition is created. Hazardous materials shall not be used where the code for new construction would not permit their use in buildings of similar occupancy, purpose and location.
When determining the appropriate application of the referenced sections of this code, the occupancy and use of a building shall be determined in accordance with Chapter 3 of the International Building Code.

302.6 Masonry Parapets

AMENDMENT
This section has been amended at the state or city level.
The following exception applies to requirements in 780 CMR 34.00 for masonry parapets:
Exception: If the height-to-thickness ratio of an unbraced unreinforced masonry parapet does not exceed 2.5, then bracing is not required. For the purpose of this exception, the height shall be measured from either the level of tension anchors or the roof sheathing, whichever is lower.

302.7 Structural Requirements Pertaining to Roofing Work

AMENDMENT
This section has been amended at the state or city level.
  1. Structural requirements of parapets of unreinforced masonry required by sections 403.5 and 707.3.1 of 780 CMR 34.00 shall only apply when the intended alteration requires a permit for reroofing and when roof covering is removed from the entire roof diaphragm and not by the 25% roof area trigger found in sections 403.5 and 707.3.1 of 780 CMR 34.00.
  2. Structural requirements of roof diaphragms resisting wind loads in high-wind regions required by sections 403.8 and 707.3.2 of 780 CMR 34.00 when the intended alteration requires a permit for reroofing, shall only apply when roof covering is removed from the entire roof diaphragm and the building is located where the ultimate design wind speed is greater than 150 mph and the building is Risk Category IV in accordance with Table 1604.5 of 780 CMR.

302.8 Structural Requirements Pertaining to Major Alterations

AMENDMENT
This section has been amended at the state or city level.
  1. Structural requirements required by sections 403.6 and 907.4.5 of 780 CMR 34.00 for unreinforced masonry walls shall apply to buildings in seismic design category B in addition to categories C, D, E, and F found in these sections and shall require roof and floor levels to be anchored to the walls.
  2. Structural requirements required by sections 403.7 and 907.4.6 of 780 CMR 34.00 for unreinforced masonry parapets shall apply to buildings in seismic design category B in addition to categories C, D, E, and F found in these sections

302.9 Provisions for Change in Occupancy Classification to R, I, or E-Use

AMENDMENT
This section has been amended at the state or city level.
Notwithstanding other requirements in 780 CMR 34.00, see 780 CMR 9.00: Fire Protection Systems and applicable provisions of 527 CMR: Board of Fire Prevention Regulations for certain carbon monoxide detection requirements when a change of occupancy classification to R, I, or E-Use occurs.

302.10 Fire Detection Systems in R-2 Uses Which Are Not Currently Equipped With Sprinklers

AMENDMENT
This section has been amended at the state or city level.
When 780 CMR 34.00 requires a smoke detection system in an R-2 Use and does not additionally require an NFPA 13, 13R, or 13D system installed throughout the building, then subsections 302.10.1 through 302.10.3 shall apply.

302.10.1 Heat Detection

AMENDMENT
This section has been amended at the state or city level.
If a building fire alarm system is provided, a heat detector shall be provided inside each dwelling unit within six feet of the entrance door. The heat detectors shall be connected to the building fire alarm system and cause a general alarm throughout the building upon activation. This shall also apply to the R-2 Use of a mixed use building.
Exception: Buildings containing three units or fewer and not provided with a building fire alarm system that comply with 302.10.3.1.

302.10.2 Common Area Detection

AMENDMENT
This section has been amended at the state or city level.
If a building fire alarm system is provided, smoke detectors shall be provided in the common areas of the building. The common area detectors shall be connected to the building fire alarm system and cause a general alarm throughout the building upon activation. This shall also apply to the R-2 Use of a mixed use building.
Exception: Buildings containing three units or fewer and not provided with a building fire alarm system that comply with 302.10.3.1.

302.10.3 Dwelling Unit Detection

AMENDMENT
This section has been amended at the state or city level.
Interconnected dwelling unit smoke detection shall sound within that dwelling unit only.
Exception: For buildings of three stories or fewer used exclusively as R-2 Use with six or fewer dwelling units and with at least two means of egress serving each dwelling unit, the fire detection system may comply with the all of the following requirements:
  1. Interconnected dwelling unit smoke detection shall sound within that dwelling unit only.
  2. Area smoke detection shall be provided throughout common uses spaces including shared means of egress.
  3. A heat detector shall be provided inside each dwelling unit within six feet of doors serving common areas.
Upon activation of either the common area smoke detection or the heat detection, a general alarm shall be sounded throughout the building.

302.10.3.1 Buildings With Three Dwelling Units or Fewer

AMENDMENT
This section has been amended at the state or city level.
In buildings containing three units or fewer, which are not protected with sprinklers and which are not provided with a building fire alarm system, each dwelling unit shall have additional interconnected smoke detectors on the stairway side of all doors leading to common interior stairways. If there is a common basement, a separate interconnected system of smoke detectors, including smoke detectors on the stairway side of all doors leading to interior stairways, shall be provided to serve the basement level only.
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