780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS

Transcription

1 780 CMR: MASSACHUSETTS AMENDMENTS TO THE INTERNATIONAL EXISTING BUILDING CODE 2009 CHAPTER 34: EXISTING STRUCTURES Replace as follows: Title. These regulations shall be known as e Existing Building Code of Massachusetts, hereinafter referred to as "is code." Replace as follows: Scope. The provisions of is code shall apply to e repair, alteration, change of occupancy, addition, and relocation of existing buildings. See Table below which includes, but is not limited to, applicable laws and specific use of oer regulations. TABLE APPLICABLE LAWS AND REGULATIONS Unless directed oerwise in is code, reference to: Shall mean to use e requirements found in: International Plumbing Code International Property Maintenance Code International Fire Code (IFC) International Electrical Code International Energy Conservation Code (IECC) International Mechanical Code (IMC) International Fuel Gas Code International Residential Code (IRC) International Building Code (IBC) or 780 CMR Construction in flood areas Accessibility Elevators and lifts 248 CMR: Board of Plumbers and Gas Fitters Regulations 780 CMR 1.00: Scope and Administration Reference to sections of e International Fire Code (IFC) for fire prevention requirements shall be considered reference to 527 CMR: Board of Fire Prevention Regulations. The fire official enforces e provisions of 527 CMR. Reference to sections of e International Fire Code (IFC) 2009 Edition for building code requirements are adopted, except at retroactive requirements of e IFC are not adopted. The building official enforces 780 CMR and all adopted IFC requirements. Also see MGL c. 148, CMR 12.00: Massachusetts Electrical Code (Amendments) 780 CMR 13 and 51 (IECC wi MA amendments) Reference to e IMC shall apply to all mechanical systems except for at which is defined as sheet metal work by M.G.L. c. 112, 237. The provisions of 271 CMR shall apply to all sheet metal work as defined by M.G.L. c.112, 237. Note: 527 CMR may cover certain fire protection requirements of e IMC. 248 CMR: Board of Plumbers and Gas Fitters Regulations 780 CMR 51.00: Residential Volume (IRC 2009 Edition wi MA amendments). 780 CMR Base Volume a.k.a. IBC wi MA amendments. 780 CMR: Appendix G: Flood-resistant Construction 521 CMR: Architectural Access Board Regulations 524 CMR: Board of Elevator Regulations Sprinkler Systems This code (780 CMR 34.00) or if applicable M.G.L. c. 148, 26A, 26A½, 26G, 26G½, 26H or 26I, or M.G.L. c rough 86d Oer requirements for Carbon Monoxide Protection in all R-Uses Refer to: 780 CMR 9.00: Fire Protection Systems for A-2 Nightclubs Use 780 CMR 1.00, 3.00, 9.00 and /11/ CMR - Eigh Edition - 133

2 Add subsections: Compliance Alternatives. Where compliance wi e provisions of e code for new construction, required by is code, is impractical because of construction difficulties or regulatory conflicts, compliance alternatives may be accepted by e building official. The building official may accept ese compliance alternatives, archaic materials and assemblies in Resource A of is code, or oers proposed. If e compliance alternative involves fire protection systems e building official shall consult wi e fire official Add subsection: Submittals. The application for a permit shall be in accordance wi 780 CMR 1.00: Scope and Administration and identify all items of non- or partial compliance wi e requirements of is code, and compliance alternatives, if any are proposed, for approval by e building official. The building official shall respond to e acceptability of any proposed compliance alternatives wiin 30 days of e filing of e permit application. Where proposed compliance alternatives are, in e opinion of e building official, unacceptable, or where issues of non-compliance remain, e permit applicant shall have e remedies prescribed by 780 CMR, section Investigation and Evaluation. For any proposed work regulated by is code and subject to 780 CMR, section 107, as a condition of e issuance of a permit e building owner shall cause e existing building (or portion ereof) to be investigated and evaluated in accordance wi e provisions of is code The investigation and evaluation shall be in sufficient detail to ascertain e effects of e proposed work on at least ese systems: structural, means of egress, fire protection, energy conservation, lighting, hazardous materials, and ventilation for e space under consideration and, where necessary, e entire building or structure and its foundation if impacted by e proposed work. The results of e investigation and evaluation, along wi any proposed compliance alternatives, shall be submitted to e building official in written report form CMR using 100% of e prescribed forces. For existing buildings wi seismic force resisting systems found in Table , e values of R, 0, and C dfrom is table shall be used in e analysis. For seismic force resisting systems not found in Table , e values of R, 0, and C dused for analysis in accordance wi 780 CMR 16.00: Structural Design shall be ose specified for structural systems classified as "Ordinary" in accordance wi Table of ASCE 7, unless it can be demonstrated at e structural system satisfies e proportioning and detailing requirements for systems classified as "Intermediate" or "Special" Insert Table TABLE BASIC SEISMIC-FORCE-RESISTING SYSTEM R 0 Cd Bearing Wall Systems 3 Steel concentrically braced frame (CBF) wi diagonal or X-bracing CBF per 6 Edition SBC except for section 9.5 of 1992 AISC Seismic Provisions Oerwise Steel CBF wi V, Inverted V or K bracing V or Inverted V bracing per 6 Edition SBC V or Inverted V bracing, oerwise K bracing Reinforced concrete shear walls wi boundary elements and wiout coupling beams, in accordance wi 780 CMR a, 5 Edition Reinforced concrete shear walls wi reinforcing steel less an required by, or wi spacing greater an permitted by Section of ACI Unreinforced concrete shear walls Reinforced masonry shear walls 5 Class A Class B Class C Unreinforced masonry shear walls /11/ CMR - Eigh Edition - 134

3 Table continued Light-framed walls sheaed wi wood structural panels or diagonal sheaing Oer light-framed walls Building Frame Systems 3 Steel concentrically braced frame (CBF) wi diagonal or X-bracing CBF per 6 Edition SBC except for section 9.5 of 1992 AISC Seismic Provisions Oerwise Steel CBF wi V, Inverted V or K bracing V or Inverted V bracing per 6 Edition SBC V or Inverted V bracing, oerwise K bracing Reinforced concrete shear walls wi boundary elements and wiout coupling beams, in accordance wi 780 CMR a, 5 Edition Reinforced concrete shear walls wi reinforcing steel less an required by, or wi spacing greater an permitted by section of ACI Unreinforced concrete shear walls Reinforced masonry shear walls 5 Class A Class B Class C Unreinforced masonry shear walls Light-framed walls sheaed wi wood structural panels or diagonal sheaing Oer light-framed walls Moment Resisting Frame Systems Steel moment frames Special Moment Frame per 6 Edition SBC Ordinary Moment Frame per 6 Edition SBC Moment frame, oerwise Reinforced concrete moment frames 8 Class A Class B Dual Systems (See ASCE 7, Section ) Steel concentrically braced frame (CBF) wi steel moment frames (MF) CBF and Special Moment Frame, per 6 Edition SBC st CBF and Moment Frame per 1 rough 5 Editions SBC, except V, Inverted V or K Braced Frames st CBF and Moment Frame per 1 rough 5 Editions SBC, wi V, Inverted V or K Braced Frames Oerwise Reinforced concrete shear walls wi boundary elements and wiout coupling beams, in accordance wi 780 CMR a, 5 Edition, wi reinforced concrete moment frames, Class A 8 Ordinary reinforced concrete shear walls, as defined in 8 Edition SBC, wi reinforced concrete moment frames, Class A /11/ CMR - Eigh Edition - 135

4 Table continued Notes: 1. Systems of previous editions of e State Building Code at meet e ductility requirements of e 8 Edition of e Code are not included in is table. 2. SBC refers to 780 CMR Commonweal of Massachusetts State Building Code. 3. A diagonal brace is one at frames from a beam-to-column connection diagonally to anoer beam-to-column connection or to a column at its base plate. 4. The seismic resistance of e frame shall be based on its seismic connections being subject to two times e computed forces and moments resulting from seismic load. 5. Class A reinforced masonry shear walls have a minimum total area of reinforcement in e vertical and horizontal direction at least times e gross cross-sectional area of e wall, wi a minimum area in each direction at least times e gross cross-sectional area of e wall. Maximum spacing of reinforcing steel bars in grouted cells or bond courses is 6'-0" in one direction and 4'-0" in e oer direction, but not more an a of e leng or height of e wall, whichever is less, in each direction. Class A walls satisfy oer requirements for reinforced masonry of e base code. 6. Class B reinforced masonry shear walls satisfy all requirements for Class A walls, except at spacing limits for reinforcing steel bars are exceeded. 7. Class C reinforced masonry shear walls satisfy all requirements for reinforced masonry of e base code. 8. Class A reinforced concrete moment frames satisfy requirements of Sections , , and of 780 CMR 5 Edition and Sections and of ACI 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 la, and stucco on metal la may be used to resist in-plane shear, where e walls are anchored to floors and to e floor or roof construction above such at ey can transfer e shear between floors and to e foundation. Gypsum sheaing, la, wall board, drywall, fiberboard and particle board are not permitted to resist in-plane shear unless originally designed in accordance wi 780 CMR for at purpose Add ese exceptions to Item Add subsection: Exceptions: CMR using 50% of prescribed forces when directed here by section CMR using eier a. 50 % of prescribed forces when directed here by section and when e vertical addition increases e building area less an or equal to 30% or, b. 75% of prescribed forces when directed here by section and when e vertical addition increases e building area more an 30% but less an 50% Cumulative Effects of Alterations, Additions, or Changes of Occupancy on Structural Elements. As noted in several sections of is code, evaluation of structural elements and eir connections shall consider e cumulative effects of alterations, additions, or changes of occupancy since original construction. Exception. When structural work: 1. does not involve more an 2% of e total tributary area of horizontal framing members of any existing framed floor or roof and, 2. does not alter shear walls above e foundation and, 3. does not alter columns or diagonal braces and, 4. does not create an opening in any framed floor or roof at has an area more an 2% of e framed floor or roof and, 5. does not alter any floor or roof diaphragm and its connections such at in-plane shear resistance is reduced by more an 5% and, 6. does not remove or reconfigure lateral load resisting frames, or foundations supporting em. 4/11/ CMR - Eigh Edition - 136

5 102.2 Replace as follows: Oer Laws and Specialty Codes. See 780 CMR 1.00: Scope and Administration. PART 2 - ADMINISTRATION AND ENFORCEMENT and all sections contained wiin it, replace wi: PART 2 - ADMINISTRATION AND ENFORCEMENT. For administration and enforcement provisions refer to 780 CMR Replace two and add two definitions as follows: CODE OFFICIAL. See BUILDING OFFICIAL in 780 CMR 2.00: Definitions. COMPLIANCE ALTERNATIVE. An alternative life-safety construction feature which meets or exceeds e requirements or intent of a specific provision of 780 CMR. The building official is auorized to approve or disapprove compliance alternatives. Compliance alternatives are allowed only for existing buildings. HOUSE MUSEUM. A house museum is an historic building or structure. The principal use of such must be as an exhibit of e building or e structure itself which is open to e public not less an 12 days per year, alough additional uses, original and/or ancillary to e principal use shall be permitted wiin e same building up to maximum of 40% of e gross floor area. All entries into e house museum list shall be certified by e Massachusetts Historical Commission. The list can be found at REGISTERED DESIGN PROFESSIONAL IN RESPONSIBLE CHARGE. REGISTERED DESIGN PROFESSIONAL in 780 CMR 2.00: Definitions. See Add a last sentence as follows: Addition or replacement of roofing or replacement of equipment shall comply wi section and as applicable After e first sentence, add is sentence: The cumulative effect of e load increase since original construction shall be considered After e first sentence, add is sentence: Add Section: The cumulative effect of e load increase since original construction shall be considered Seismic Hazards. Compliance wi is section is required where e work area exceeds 50% of e aggregate area of e building Wall Anchors for Concrete and Masonry Buildings. For any building assigned to Seismic Design Category B, C, D, E or F wi a structural system consisting of concrete or reinforced masonry walls wi flexible roof or floor diaphragms or unreinforced masonry walls wi any type of roof or floor diaphragm, e alteration work shall include installation of wall anchors at e roof and floor levels to resist e reduced IBC-level seismic forces specified in section , unless an evaluation demonstrates compliance of existing wall anchorage Bracing for Unreinforced Masonry Parapets. Parapets constructed of unreinforced masonry in buildings assigned to Seismic Design Category B, C, D, E or F shall have bracing installed as needed to resist e reduced IBC-level seismic forces specified in section , unless an evaluation demonstrates compliance of such items. Parapet corrective work shall be performed in conjunction wi e installation of tension roof anchors. The minimum height of a parapet above any wall anchor shall be 12 inches. Exception: If e maximum height of an unbraced unreinforced masonry parapet above e lower of eier e level of tension anchors or e roof sheaing does not exceed a height-to-ickness ratio of 2.5, en bracing is not required. 4/11/ CMR - Eigh Edition - 137

6 606.2 To exceptions 1 and 2, add a second sentence as follows: The cumulative effect of e load increase since original construction shall be considered Add is exception: Exception: If e maximum height of an unbraced unreinforced masonry parapet above e lower of eier e level of tension anchors or e roof sheaing does not exceed a height-to-ickness ratio of 2.5, en bracing is not required Modify as follows: Roof Diaphragms Resisting Wind Loads in High Wind Regions. Where roofing materials are removed from e entire roof diaphragm of a building located where e basic wind speed is 115 mph or greater and e occupancy category is type IV as defined in Table of 780 CMR, roof diaphragms and connections at are part of e main wind-force resisting system shall be evaluated for e wind loads specified in 780 CMR, including wind uplift. If e diaphragms and connections in eir current condition do not comply wi ose wind provisions, ey shall be replaced or strengened in accordance wi e loads specified in 780 CMR Replace e exception as follows: Exception. Buildings in which e reconfiguration is exclusively e result of compliance wi e accessibility requirements of e Architectural Access Board at 521 CMR Add is exception: Exception. R-2 structures of ree units, undergoing Level 2 renovations, are exempt from e requirements of is section provided at: 1. The work area is on a single unit and, 2. No oer permits for Level 2 work have been issued for e building in e previous two years Item 3., , and Item 2. Delete e word 'municipal' Replace as follows: Supervision. Fire sprinkler systems required by is section shall be supervised in accordance wi 780 CMR 9.00: Fire Protection Systems rough , and Replace International Fire Code wi 780 CMR 9.00: Fire Protection Systems Delete Exception Insert after e '100' text as follows: 'and Nightclubs wi an occupant load of 50 or greater' Add is as a second sentence to Exception 1: The cumulative effect of e stress increase since original construction shall be considered for e purposes of is exception Add subsection: Irregularities. Where e alteration results in a structural irregularity as defined in ASCE 7, e lateral load-resisting structural elements shall comply wi e structural requirements specified in section /11/ CMR - Eigh Edition - 138

7 802.1 Replace is section as follows: High-rise Buildings. High-rise buildings as defined by 780 CMR 2.00: Definitions shall comply wi e requirements of section Delete e word 'municipal' which occurs in two locations Delete Exception At e end of is section add ese two sentences: Add sections: For e purposes of calculating demand-capacity ratios, e demand shall consider applicable load combinations wi design lateral loads or forces in accordance wi 780 CMR, sections 1609 and For purposes of is section, comparisons of demand-capacity ratios and calculation of design lateral loads, forces, and capacities shall account for e cumulative effects of additions and alterations since original construction Seismic Hazards. Compliance wi is section is required only when e work area exceeds 50% of e aggregate area of e building Wall Anchors for Concrete and Masonry Buildings. For any building assigned to Seismic Design Category B, C, D, E or F wi a structural system consisting of concrete or reinforced masonry walls wi flexible roof or floor diaphragms or unreinforced masonry walls wi any type of roof or floor diaphragm, e alteration work shall include installation of wall anchors at e roof and floor levels to resist e reduced IBC-level seismic forces specified in section , unless an evaluation demonstrates compliance of existing wall anchorage Bracing for Unreinforced Masonry Parapets. Parapets constructed of unreinforced masonry in buildings assigned to Seismic Design Category B, C, D, E or F shall have bracing installed as needed to resist e reduced IBC-level seismic forces specified in section , unless an evaluation demonstrates compliance of such items. Parapet corrective work shall be performed in conjunction wi e installation of tension roof anchors. The minimum height of a parapet above any wall anchor shall be 12 inches. Exception: If e maximum height of an unbraced unreinforced masonry parapet above e lower of eier e level of tension anchors or e roof sheaing does not exceed a height-to-ickness ratio of 2.5, en bracing is not required Add items 10. and 11. and e note as follows: 10. Day care. (see 780 CMR for classification) 11. Group homes. Note. Also see section 912 when change of occupancy classification occurs Add is as a second sentence to e exception: The cumulative effect of e stress increase since original construction shall be considered for e purpose of is exception Replace first paragraph and Exception 1 as follows: Delete Compliance wi e International Building Code Level Seismic Forces. Where a building or portion ereof is subject to a change of occupancy at results in e building being assigned to a higher occupancy category based on 780 CMR Table , e building shall comply wi seismic forces as specified in section for e new occupancy category. Exceptions: 1. Any occupancy being changed to Group A, E, I-1, R-1, R-2 or R-4 occupancies for buildings less an six stories in height and in Seismic Design Category A, B or C. 4/11/ CMR - Eigh Edition - 139

8 To exception 1 add a second sentence as follows: The cumulative effect of e stress increase since original construction shall be considered for e purpose of is exception Add a second sentence as follows: Where e addition increases e building area less an 50%, e evaluation and analysis shall demonstrate compliance wi reduced seismic force levels as specified in section To exception 1 add a second sentence as follows: The cumulative effect of e stress increase since original construction shall be considered for e purpose of is exception Replace is section as follows: Scope. It is e intent of is chapter to provide means for e preservation of historic buildings as certified by e Massachusetts Historical Commission. There is no obligation for owners of historic buildings to use e provisions of is chapter. This chapter shall preempt all oer regulations of 780 CMR governing e reconstruction, renovation, alteration, change of use and occupancy, repair, maintenance and additions for e conformity of historic buildings and structures to 780 CMR, wi e exception of 780 CMR, section 113 for appeals, or unless oerwise specified. In case of fire or oer casualty to a historic building, said building may be rebuilt, in total or in part, using such techniques and materials as are necessary to restore it to its original condition and use group. If a building or structure as a result of proposed work would become eligible for certification as a historic building and e Massachusetts Historical Commission so certifies by affidavit, and such affidavit is submitted to e building official wi e permit application, en e building official shall have e auority to allow e work to proceed under e provisions of is chapter Replace all references to 'museum' wi 'house museum' Add a second paragraph as follows: Where one or more floors of a house museum are limited to one means of egress, e occupancy load shall be computed as follows: 1. Floors below e First Story. Not more an one occupant per 100 square feet of gross floor area wi a maximum occupancy of First Story. Not more an one occupant per 50 square feet of gross floor area. 3. Second Story and Above. Not more an one occupant per 100 square feet of gross floor area, or 30 occupants per 22 inch unit of egress wid, whichever condition results in e lesser occupancy load Replace as follows: Fire Protection Equipment. Fire protection equipment shall be provided for house museums according to e following requirements: 1. Manual Fire Extinguishing Equipment. All use groups, oer an R-3 and R-4, shall have approved manual fire extinguishing equipment, as determined by e head of e local fire department. 2. Fire Alarm Systems. Use groups R-1, R-2 and R-3 shall conform to e requirements of 780 CMR 907, as applicable. All oer use groups shall comply wi section items 2.(a) and (b). (a) Locations. Provide smoke detectors in accordance wi manufacturers listing and spacing requirements, but not less an one, for every 1200 square feet of floor area per level. In addition, all lobbies, common corridors, hallways and exitway access and discharge routes shall be provided wi approved smoke detectors installed in accordance wi e manufacturers listing and spacing requirements but not more an 30 feet spacing between detectors. All required smoke detectors shall have an alarm audible roughout e structure or building. (b) Single Station and Multiple Station Smoke Detection Devices. As required by 780 CMR 9.00: Fire Protection Systems. 4/11/ CMR - Eigh Edition - 140

9 3. Manual Pull Stations. A manual fire alarm pull station shall be provided in e natural pa of egress in all use groups except R-3 and R-4. Manual pull stations shall be connected to e building fire warning system in conformance wi NFPA 72. Exception. House museums which are provided wi an approved automatic fire-extinguishing system roughout shall not be required to be provided wi manual fire extinguishing equipment. Smoke detection devices shall not be required in occupancies oer an Use Groups R-1, R-2, and R Supervision. Fire alarm systems required by is section shall be supervised in accordance wi e requirements 780 CMR 9.00: Fire Protection Systems. Exception. Residential single and multiple station smoke detectors Add a second exception as follows: Exceptions 2. House museums need not comply wi e wind load and seismic load requirements of is code Delete e first sentence of is section Add section: Peer Review. At e discretion of e building official, e owner shall engage a registered design professional to review e performance compliance evaluation and meodologies proposed to determine compliance wi is section. The registered design professional shall prepare a written report to e building official summarizing e results of eir review. Items identified by e registered design professional as needing modification in order to be in compliance wi is section shall be addressed to e satisfaction of e building official prior to e issuance of a building permit Add note as follows: Note. Automatic sprinklers required by M.G.L. c G need not be considered "Required sprinklers" for e purposes of is section Add two notes at e end of is section: Add section: Note 1. As applicable, Department of Environmental Protection (DEP) Regulations, 310 CMR 7.09: U: Dust, Odor, Construction and Demolition, and e requirements of M.G.L. c A, addressing disposal of demolition debris, must be satisfied. Note 2. As applicable, 527 CMR, in conjunction wi M.G.L. c A must be satisfied if fire protection systems are to be dismantled, shut-off, or modified Removal of Waste Material. Material shall not be dropped by gravity or rown outside e exterior walls of a building during demolition or erection, chutes shall be provided for e removal of such materials. Where e removal of any material will cause an excessive amount of dust, such material shall be wet down to prevent e creation of a nuisance. Exception. The requirements of is section may be waived based on site conditions if approved by e building official Replace 'e International Plumbing Code' wi 'e requirements of e Department of Public Heal and 248 CMR, as applicable' Replace 'section 110.3' wi 780 CMR 1.00: Scope and Administration Delete is section. 4/11/ CMR - Eigh Edition - 141

10 Appendix A106.2 Add subsection 4 as follows: 4. The values contained in Table A106.2 shall be used as material property values of e existing material listed erein, unless values are specified by oer provisions in is chapter, or values are used, based on available historical information for a particular type of masonry construction, prevailing codes, and assessment of existing conditions. A106.2 Insert TABLE A106.2 MATERIAL PROPERTY VALUES TABLE A106.2 MATERIAL PROPERTY VALUES Symbol/Notat ion Description Maximum Value Notes f m See section A psi Per section A108.3 E Elastic Modulus in Compression 550,000 psi Based on f = 1,000 psi m f sp See section A104 0 psi - v m Masonry wi running bond lay-up 20 psi - m v m Masonry, fully grouted, wi a lay-up oer an running bond 20 psi - v m Masonry, partially grouted or ungrouted, wi a lay-up oer an running bond 10 psi - (PAGES 143 THROUGH 146 ARE RESERVED FOR FUTURE USE.) 4/11/ CMR - Eigh Edition - 142