This file incorporates comment from numerous stakeholders and building officials, staff, two BBRS advisory committees (SAC and C34AC), and others into the original redline code proposal approved by the BBRS in 2012.

780CMR: MASSACHUSETTS AMENDMENTS TO THE INTERNATIONAL EXISTING BUILDING CODE 2009

CHAPTER 34: EXISTING BUILDINGS AND STRUCTURES

CHAPTER 34: Delete in its entirety and replace with the International Existing Building Code 2009 (IEBC 2009) including its appendices, and as modified with Massachusetts Amendments as follows:

101.1 Replace as follows:

101.1 Title. These regulations shall be known as the Existing Building Code of Massachusetts, hereinafter referred to as “this code.”

101.2 Replace as follows:

101.2 Scope. The provisions of this code shall apply to the repair, alteration, change of occupancy, addition, and relocation of existing buildings. See Table 101.2 below which includes, but is not limited to, applicable laws and specific use of other regulations.

TABLE 101.2 APPLICABLE LAWS AND REGULATIONS

Unless directed otherwise in this code, reference to: / Shall mean to use the requirements found in:
International Plumbing Code / 248 CMR Board of Plumbers and Gas Fitters Regulations
International Property Maintenance Code / 780 CMR 1
International Fire Code (IFC)
Table 101.2: The IFC reference was synched with proposed language in Chapter 1. / Reference to the IFC for fire prevention issues shall be considered reference to 527 CMR Board of Fire Prevention Regulations. 527 CMR is enforced by the fire official.
IFC provisions for prospective building code issues not otherwise addressed in 780 CMR are adopted. Retroactive building code provisions of the IFC are not adopted by 780 CMR. 780 CMR is enforced by the building official.
International Electrical Code / 527 CMR 12 Massachusetts Electrical Code
International Energy Conservation Code (IECC) / 780 CMR 13 and 51 (IECC with MA amendments)
International Mechanical Code (IMC) / Reference to the IMC for sheet metal work only shall be considered reference to 271 CMR Board of Examiners of Sheet Metal Workers, otherwise the IMC shall be used.
International Fuel Gas Code / 248 CMR Board of Plumbers and Gas Fitters Regulations
International Residential Code (IRC) / 780 CMR 51 Residential Volume (IRC with MA amendments).
International Building Code (IBC) or 780 CMR / 780 CMR Base Volume a.k.a. IBC with MA amendments.
Construction in flood areas / 780 CMR Appendix G
Accessibility / 521 CMR Architectural Access Board Regulations
Elevators and lifts / 524 CMR Board of Elevator Regulations
Sprinkler Systems / This code (780 CMR 34) or if applicable M.G.L. c. 148, § 26A, 26A1/2, 26G, 26G1/2, 26H or 26I, or M.G.L. c. 272 §§ 86 through 86d
Other requirements / Refer to:
for Carbon Monoxide Protection in all R-Uses / 780 CMR 9
for A-2 Nightclubs Use / 780 CMR 1, 3, 9 and 10

Table 101.2: CO and nightclub requirements were moved from elsewhere in the document to this table.

101.5.0 Add subsections:

Section 101.5.0: After SAC review, structural compliance alternatives were allowed. The original proposal precluded this but earlier code editions did not.

101.5.0 Compliance Alternatives. Where compliance with the provisions of the code for new construction, required by this code, is impractical because of construction difficulties or regulatory conflicts, compliance alternatives may be accepted by the building official. The building official may accept these compliance alternatives, archaic materials and assemblies in Resource A of this code, or others proposed. If the compliance alternative involves fire protection systems the building official shall consult with the fire official.

101.5.0.1 Submittals. The application for a permit shall be in accordance with 780CMR 1 and identify all items of non- or partial compliance with the requirements of this code, and compliance alternatives, if any are proposed, for approval by the building official. The building official shall respond to the acceptability of any proposed compliance alternatives within 30 days of the filing of the permit application. Where proposed compliance alternatives are, in the opinion of the building official, unacceptable, or where issues of non-compliance remain, the permit applicant shall have the remedies prescribed by 780CMR 113.

101.5.1 Replace as follows:

101.5.1 Prescriptive compliance method. Repairs, alterations, additions, and changes of occupancy complying with Chapter 3 of this code in buildings complying with these sections of the International Fire Code:

1.  803 Interior Wall and Ceiling Finish and Trim in Existing Buildings

2.  804 Interior Wall and Ceiling Trim in New and Existing Buildings

3.  4603 Fire Safety Requirements for Existing Buildings

4.  4604 Means of Egress for Existing Buildings

shall be considered in compliance with the provisions of this code. In International Fire Code Section 4603 any reference to ‘fire code official’ shall mean ‘building official and fire official’ and in International Fire Code Section 4604 any reference to ‘fire code official’ shall mean ‘building official’. In addition to these requirements,

The investigation and evaluation report (Section 101.5.4.0) shall indicate how the building will comply with Sections 803, 804, 4603 and 4604 of the International Fire Code.

Note: This compliance method shall not apply to Group R occupancies unless the Group R occupancy is in compliance with the fire suppression provisions of the 6th or later edition of 780 CMR 9.

Section 101.5.1: The sprinkler requirement for R-Use found in the note was moved from its original location in Section 301.1.2. It is suggested that the 7th edition be used instead of the 6th edition. The Chapter 34 Advisory Committee (C34AC) agreed to retain this requirement for the Prescriptive Method.

101.5.4.0 Add subsection:

101.5.4.0 Investigation and Evaluation. For any proposed work regulated by this code and subject to 780CMR 107, as a condition of the issuance of a permit the building owner shall cause the existing building (or portion thereof) to be investigated and evaluated in accordance with the provisions of this code

The investigation and evaluation shall be in sufficient detail to ascertain the effects of the proposed work on at least these systems: structural, means of egress, fire protection, energy conservation, lighting, and ventilation for the space under consideration and, where necessary, the entire building or structure and its foundation if impacted by the proposed work.

The results of the investigation and evaluation, along with any proposed compliance alternatives, shall be submitted to the building official in written report form.

Section 101.5.4.0 was clarified to include the review of several key building systems in the I&E report.

101.5.4.1 Item 1. Replace this Item as follows:

1.780 CMR using 100% of the prescribed forces. For existing buildings with seismic force resisting systems found in Table 101.5.4.1.0, the values of R, Ω0, and Cd from this table shall be used in the analysis. For seismic force resisting systems not found in Table 101.5.4.1.0, the values of R, Ω0, and Cd used for analysis in accordance with 780CMR 16 shall be those specified for structural systems classified as “Ordinary” in accordance with Table 12.2-1 of ASCE7, unless it can be demonstrated that the structural system satisfies the proportioning and detailing requirements for systems classified as “Intermediate” or “Special”.

101.5.4.1.0 Insert Table 101.5.4.1.0

The formatting of this Table and Table A106.2 went awry during various revisions of this file. The original format, text, and data values will be retained in the final version.

TABLE 101.5.4.1.0

BASIC SEISMIC-FORCE-RESISTING SYSTEM / R / Ω0 / Cd
Bearing Wall Systems
Steel concentrically braced frame (CBF) with diagonal 3 or X-bracing
CBF per 6th Edition SBC2 except for Section 9.5 of 1992 AISC Seismic Provisions / 3.5 / 2 / 3.5
Otherwise4 / 3 / 3 / 3
Steel CBF with V, Inverted V or K bracing
V or Inverted V bracing per 6th Edition SBC2 / 3 / 3 / 3
V or Inverted V bracing, otherwise4 / 3 / 3 / 3
K bracing / 1.25 / 1.25 / 1.25
Reinforced concrete shear walls with boundary elements and without coupling beams, in accordance with 780 CMR 1113.5.1.4a, 5th Edition / 5 / 2.5 / 5
Reinforced concrete shear walls with reinforcing steel less than required by, or with spacing greater than permitted by Section 11.9.9 of ACI 318-08 / 1.5 / 1.5 / 1.5
Unreinforced concrete shear walls / 1.25 / 1.25 / 1.25
Reinforced masonry shear walls
Class A5 / 4.5 / 2.5 / 3.5
Class B6 / 2.25 / 2.25 / 2.25
Class C7 / 1.25 / 1.25 / 1.25
Unreinforced masonry shear walls / 1.25 / 1.25 / 1.25
Light-framed walls sheathed with wood structural panels or diagonal sheathing / 4 / 2.5 / 3
Other light-framed walls10 / 2 / 2 / 2
Building Frame Systems
Steel concentrically braced frame (CBF) with diagonal 3 or X-bracing
CBF per 6th Edition SBC2 except for Section 9.5 of 1992 AISC Seismic Provisions / 4 / 2 / 3.5
Otherwise4 / 3 / 3 / 3
Steel CBF with V, Inverted V or K bracing
V or Inverted V bracing per 6th Edition SBC2 / 3 / 3 / 3
V or Inverted V bracing, otherwise4 / 3 / 3 / 3
K bracing / 1.5 / 1.5 / 1.5
Reinforced concrete shear walls with boundary elements and without coupling beams, in accordance with 780 CMR 1113.5.1.4a, 5th Edition / 6 / 2.5 / 5
Reinforced concrete shear walls with reinforcing steel less than required by, or with spacing greater than permitted by Section 11.9.9 of ACI 318-08 / 1.5 / 1.5 / 1.5
Unreinforced concrete shear walls / 1.5 / 1.5 / 1.5
34.00:continued
Table 101.5.4.1.0 - continued
Reinforced masonry shear walls
Class A5 / 5 / 2.5 / 4
Class B6 / 2.25 / 2.25 / 2.25
Class C7 / 1.5 / 1.5 / 1.5
Unreinforced masonry shear walls / 1.5 / 1.5 / 1.5
Light-framed walls sheathed with wood structural panels or diagonal sheathing / 4 / 2.5 / 3
Other light-framed walls10 / 2.5 / 2.5 / 2.5
Moment Resisting Frame Systems
Steel moment frames
Special Moment Frame per 6th Edition SBC2 / 8 / 3 / 5.5
Ordinary Moment Frame per 6th Edition SBC2 / 3.5 / 3.5 / 3.5
Moment frame, otherwise4 / 3 / 3 / 3
Reinforced concrete moment frames
Class A8 / 5 / 3 / 4.5
Class B9 / 2.5 / 2.5 / 2.5
Dual Systems (See ASCE 7, Section 12.2.5.1)
Steel concentrically braced frame (CBF) with steel moment frames (MF)
CBF and Special Moment Frame, per 6th Edition SBC2 / 5 / 2.5 / 4.5
CBF and Moment Frame per 1st through 5th Editions SBC2, except V, Inverted V or K Braced Frames / 3.5 / 2.5 / 3.5
CBF and Moment Frame per 1st through 5th Editions SBC2, with V, Inverted V or K Braced Frames / 3 / 2.5 / 3
Otherwise / 1.5 / 1.5 / 1.5
Reinforced concrete shear walls with boundary elements and without coupling beams, in accordance with 780 CMR 1113.5.1.4a, 5th Edition, with reinforced concrete moment frames, Class A8 / 6 / 2.5 / 5
Ordinary reinforced concrete shear walls, as defined in 8th Edition SBC, with reinforced concrete moment frames, Class A8 / 5.5 / 2.5 / 4.5
Notes:
1.Systems of previous editions of the State Building Code that meet the ductility requirements of the 8 th Edition of the Code are not included in this table.
2.SBC refers to 780 CMR Commonwealth of Massachusetts State Building Code.
3.A diagonal brace is one that frames from a beam-to-column connection diagonally to another beam-to-column connection or to a column at its base plate.
4.The seismic resistance of the frame shall be based on its seismic connections being subject to two times the computed forces and moments resulting from seismic load.
5.Class A reinforced masonry shear walls have a minimum total area of reinforcement in the vertical and horizontal direction at least 0.0020 times the gross cross-sectional area of the wall, with a minimum area in each direction at least 0.0007 times the gross cross-sectional area of the wall. Maximum spacing of reinforcing steel bars in grouted cells or bond courses is 6'-0" in one direction and 4'-0" in the other direction, but not more than 1/3 of the length or height of the wall, whichever is less, in each direction. Class A walls satisfy other requirements for reinforced masonry of the base code.
6.Class B reinforced masonry shear walls satisfy all requirements for Class A walls, except that spacing limits for reinforcing steel bars are exceeded.
7.Class C reinforced masonry shear walls satisfy all requirements for reinforced masonry of the base code.
8.Class A reinforced concrete moment frames satisfy requirements of Sections 1113.5.1, 1113.5.1.1, 1113.5.1.2 and 1113.5.1.3 of 780 CMR 5th Edition and Sections 11.12.1.1 and 11.12.1.2 of ACI 318-83 for reinforcing of beam to column joints.
9.Class B reinforced concrete moment frames do not satisfy requirements for Class A reinforced concrete moment frames.
10.Wood siding over horizontal or diagonal boards, plaster on wood or metal lath, and stucco on metal lath may be used to resist in-plane shear, where the walls are anchored to floors and to the floor or roof construction above such that they can transfer the shear between floors and to the foundation. Gypsum sheathing, lath, wall board, drywall, fiberboard and particle board are not permitted to resist in-plane shear unless originally designed in accordance with 780 CMR for that purpose.


34.00:continued