Preview of the MA Building Code (780 CMR) 9 th edition Presented by: Ron Melucci, P.E. Engineering Planning and Management, Inc rbm@epm inc.com www.epm inc.com 508 875 2121
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9 TH Edition MSBC Based on 2015 IBC July 2016 adoption date No 6 month grace period Need to apply for variance Many granted administratively (without hearing). Should be easy to obtain at first (e.g. August), more difficult to justify later (e.g. December). 4
307.4 Facilities Generating Combustible dust To determine occupancy classification (F or H) a technical report must be provided to the building official that provides all necessary information for a qualified decision as to the potential combustible dusts hazard (307.4, 2012 edition) 5
Combustible Dust Classification (E, F, G) Explosibility Screening Test Go / No go Classification Explosion Severity Test (Maximum Explosion Pressure, Kst) Minimum Ignition Energy (MIE) Test Dust Cloud Processing, coating, woodworking, manufacturing, atritors, compounding, mixing, etc. NFPA 70, Class II locations NFPA 654, NFPA 499 Detailed analysis that determines the entire code approach 6
308.4 Group I classification 308.4 Group I 2 occupancy classification Six or more incapable of self preservation and receiving care on a 24 hour basis. Day surgery, oral surgery etc. not I 2 Group I Condition Condition 1, slower, self evacuation (long term, residential) Condition 2, assisted evacuation 7
IBC 2015 Commentary 8
311.1.1 Accessory Storage Spaces Storage rooms less than 100 sf shall be same occupancy classification as main building Aggregate area shall not exceed allowable area of 508.2: 10 percent of the floor area of the story (accessory) Tabular allowable area for nonsprinklered buildings 9
Accessory Storage Example 4 story sprinklered multifamily building (Group R 2) Type IIB Const Actual area 52,000 sf, Allowable area 48,000 sf 10 small storage rooms each of 80 sf (Group R 2) One large storage room 6,000 sf (Group?) Is total area of S less than allowable area for S (52,000 sf)? Yes Total area less than 5,200 sf? no 8 small rooms are Group R One large room is Group S 1 10
Accessory Storage Example 11
Accessory Storage Example Compliance approach options: Accessory Occupancy? Only small rooms Non Separated Mixed Occupancy? No Separated Mixed Occupancy (508.4)? Maybe See below Separate Buildings with Firewall? Yes Upgrade Construction Type? Yes Yes, if sum of ratios actual/allowable building area is less than 1 43,000/48,000 + 6,000/52,500 = 0.88 + 0.11 = 0.99 Yes 12
Accessory Storage Spaces Example Question: Do these storage spaces need to be separated from the main building use with fire resistance rated construction? Answer: The large ones do, because we used a separated mixed use approach. 13
Accessory Storage Spaces Example Question: What about the 90 sf storage rooms? Answer: Maybe. Still may need to be separated if also classified as an incidental use 14
Incidental Uses Section 509 Ancillary functions associated with a given occupancy that generally pose a greater level of risk to that occupancy. Specifically defined in Table 509 15
Incidental Uses 16
Incidental Use Example University studio arts building (B), 4 stories, Type (IIB) construction with paint shop room (F 1 or S 1) in Basement Allowable height for B is 4 stories, S 1 or F 1 is only 3 stories Options to comply with building height requirements: Can use accessory area strategy only if < 10%, but still need 1 hour FRR and sprinklers per Table 508.2.5 Use separated mixed occupancy strategy (1 hour FRR horizontal sep). B B B B S 1
403.1 Applicability of High Rise Provisions Airport traffic control towers in accordance with Section 412.3. Open parking garages in accordance with Section 406.5. The portion of a building containing a Group A 5 (stadiums etc.) occupancy in accordance with Section 303.6. Special industrial occupancies in accordance with Section 503.1.1. Buildings with: A Group H 1 occupancy, A Group H 2 occupancy in accordance with Sections 415.8, 415.9.2, 415.9.3 or 426.1; or, A Group H 3 occupancy in accordance with Section 415.8. 18
403.6.1 Fire service access Two (2) fire service access elevators are now required in high rise buildings greater than 120 ft. in height (403.6.1) elevators Intended for rescue, staging, etc. 19
Fire Service Access Elevator MSBC 403.6.1 requirements in compliance with IBC 3007 Direct access from stair Elevator lobby minimum 150 s.f. s/e power and 1 hour FRR for all el. & lobby circuits 20
404.5 Atrium Smoke Control in Group I Occupancies 404.5 Smoke Control. Now required in atriums in Group I 2 and Group I 1 Condition 2, that connect two stories. Condition 2. Buildings in which there are any persons receiving custodial care who require limited verbal or physical assistance while responding to an emergency situation to complete building evacuation. 21
406.5.2.1 Parking Garage Openings Clear horizontal space adjacent to openings below grade for natural ventilation. 22
414.5.1 Hazardous Materials Inside storage, dispensing, and use requirements now consistent with IFC 2012. No longer limited to Use Group H. Applicable for lower quantities of chemicals if explosion hazard exists. Explosion control/venting Fire Detection Spill containment Standby Power Electrical hazard classification 23
424 Children s play structures Requirements regulate materials and combustibility and separation (20 ft). Children s play structures installed inside all occupancies covered by this code that exceed 10 feet in height and 150 square feet in area shall comply with Sections 402.12.1 through 402.12.4 424.2 through 424.5. No longer limited to covered malls 24
505.2 Mezzanine means of egress Mezzanine means of egress general reference to Chapter 10 single means of egress if complies as a room (OL, common POT, etc). 25
Table 602 Exterior wall FRR Nonbearing exterior walls with unlimited unprotected openings based on Table 705.8 are no longer required to have FRR due to fire separation distance. 26
Exterior wall rating Example New Type IIB, A 3 Use Maximize glazing (Table 705.8) Existing Type IIIB, B Use 27
Exterior wall rating Example New Type IIB, A 3 Use Maximize glazing Existing Type IIIB, B Use 28
Table 705.8 Exterior Wall Opening Protection 29
705.3 Buildings on Same Lot Exception now allows openings through adjacent exterior walls of a Group S 2 parking garage and a Group R 2 building. 30
901.8 Fire Pump rooms Fire Pump and riser rooms sized to facilitate maintenance (901.8, 2012 edition) service and remove largest piece of equipment. Section 901.8 establishes new requirements to ensure rooms housing fire protection system risers or fire pumps and their components have adequate space to facilitate their maintenance. 31
901.8 Fire Pump rooms 32
903.2.11.1.3 Sprinkler System in basement 903.2.11.1.3 basements with walls that can obstruct hose streams require sprinkler protection 33
1001.4 Evacuation plans Evacuation plans required in several building types per IFC Certain A, B, E, F, H, I, M and R, High rises Underground buildings Covered malls Buildings with atria 34
1001.4 Evacuation plans 35
1011.2 Floor level exit signs Floor level exit signs in Group R 1.(1011.2, 2012 edition) Where exit signs are required in Group R 1, additional low level exit signs shall be provided in all areas serving guestrooms in Group R 1. 36
1014.8 Handrail Projections The available egress width shall be reduced by the distance between the closest edges of each such intermediate pair of handrails that is greater than 6 inches (152 mm). 37
1014.8 Handrail Projections 38
1016.2 Egress through Intervening Spaces Exit access is permitted through an enclosed elevator lobby provided(1016.2): Access to at least one exit shall be provided without travel through the lobby. Protection required for lobby is not required to extend to exit unless access to the exit is required by other sections (e.g., fire service access elevator lobby requires direct access to an exit stairway per Section 3007.6.1). 39
1016.2 Egress through Intervening Spaces 40
1017.2.2 Travel Distance Increase for Groups F 1 and S 1 41
1020.2 Corridor Width and Capacity In Group I 2 occupancies, corridors are not required to have a clear width of 96 inches (2438 mm) in areas where there will not be stretcher or bed movement for access to care or as part of the defend in place strategy (1020.2) 42
1021.2.1 Single exit in Mixed Occupancies Number of Occupants served by a single exit by mixed use calculation (sum of ratios less than 1) 43
1705.17 Firestopping High rise and Risk Categories III and IV Need approved inspection agency as a part of the special inspection process. Special Inspection 44
1705.16 Firestopping Special Inspection Product is not rated the SYSTEM carries the rating Education of Building Inspectors and Contractors is growing Most overlooked fire protection SYSTEM 45
Questions? www.epm inc.com 508 875 2121 Ron Melucci, P.E., rbm@epm inc.com 46