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HomeMy WebLinkAboutVail Code Analysis 021710 5339 Alpha Road T 972.701.9636 Architecture Suite 300 F 972.701.9639 Planning Dallas, Texas 75240 W humphreys.com Interiors HUMPHREYS & PARTNERS ARCHITECTS, L.P. Dallas • Irvine • New Orleans • Orlando © Humphreys & Partners Architects, L.P. 2/17/2010 CODE ANALYSIS FOR VAIL TIMBER RIDGE HPA Project Number 2009024 Town of Vail, Colorado Adopted Codes: 2009 International Building Code, including Appendix Chapters B, C, E, G, J, K. 2009 International Fire Code, including Appendix Chapters B, C, D, E, G, H, I and J. 2009 International Mechanical Code, including Appendix A. 2009 International Plumbing Code 2009 International Fuel Gas Code 2009 International Energy Conservation Code 2008 National Electrical Code Scope of Work: The project is comprised of a 5-story wood-framed apartment building of Type III-A Construction wrapped around a 5 level enclosed parking garage of Type I-A Construction. The Ground Level is a basement. The project includes 352 dwelling units, a clubhouse/leasing facility, and resident storage facilities. The project has three elevators and all dwelling units will be covered dwelling units complying with the Fair Housing Act and the adopted building code. 2% of the total number of dwelling units (8 units) will be defined as Type A dwelling units and will dispersed among the unit classes. Occupancies Classified: Principal Occupancy: Wood-framed apartments – R-2 Separated Occupancies: Storage Facilities inside garage – S-1; 1-hour fire barrier per Table 508.4. Separated Occupanices: Wood-framed clubhouse – A-3; 1-hour fire barrier per Table 508.4. Actual A-3 + Actual R-2 < 1 Allowable A-3 Allowable R-2 7,911 SF + 3,066 SF = .26 42,000 SF 43,200 SF Enclosed parking garage – S-2; 1-hour fire barrier per Table 508.4 Actual S-2 + Actual R-2 < 1 Allowable S-2 Allowable R-2 32,841 SF + 11,552 SF = .27 ∞ 43,200 SF Incidential Uses: Waste Collection Rooms over 100 square feet/Trash Chute Termination Rooms – 1-hour fire barrier. Page 2 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Building Attributes The building is equipped throughout with an automatic fire sprinkler system per NFPA 13. The allowable areas are: R-2 = 24,000 SF/floor + 200% increase for NFPA 13 sprinkler = 72,000 SF/floor 72,000 SF x 3 for multi-story building = 216,000 SF divided by 5 stories = 43,200 SF/floor A-3 = 14,000 SF/floor + 200% increase for NFPA 13 sprinkler = 42,000 SF/floor S-2 = Unlimited area No increase for frontage has been considered. Fire Area 1 Actual Area Fire Area 2 Actual Area Fire Area 3 Actual Area Basement Basement Basement R-2 3,066 R-211,552 R-2 8,298 A-3 7,911 S-225,155 First Floor First Floor First Floor R-2 25,135 R-211,363 R-2 25,004 S-232,841 Second Floor Second Floor Second Floor R-2 25,463 R-211,363 R-2 25,319 S-232,841 Third Floor Third Floor Third Floor R-2 25,377 R-211,278 R-2 22,880 S-232,841 Fourth Floor Fourth Floor Fourth Floor R-2 25,504 R-211,419 R-2 21,907 S-232,841 Fifth Floor Fifth Floor Fifth Floor R-2 18,980 R-20 R-2 18,825 S-219,693 Building Height in Feet Allowable Heights: R-2 = 85 feet with NFPA 13 increase of 20 feet A-3 = 85 feet with NFPA 13 increase of 20 feet S-2 = Unlimited Actual Heights: This is still under review but confident that the height will be approximately 20 feet below the maximum allowable height. *Towers and other roof structures, not used for storage or habitation and constructed of combustible materials, can extend 20 feet above the allowable building height of 85 feet. Building Height in Stories Allowable Heights: R-2 = 5 stories with NFPA 13 increase of 1 story A-3 = 4 stories with NFPA 13 increase of 1 story S-2 = Unlimited Page 3 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Actual Heights: R-2 = 5 stories with a basement A-3 = 2 stories S-2 = 4 stories with roof level parking (5 levels) Story Above Grade Plane. Any story having its finished floor surface entirely above grade plane, or in which the finished surface of the floor next above is: 1. More than 6 feet above grade plane; or 2. More than 12 feet above the finished ground level at any point. This is a terraced building. Per Figure 502-6 of the 2006 IBC Handbook, a terraced building can be evaluated in segments to determine the number of stories. Sprinkler System The buildings will be sprinkled throughout with an NFPA 13 fully-automatic sprinkler system. Construction Type R-2 = Type III-A A-3 = Type III-A S-2 = Type I-A Table 601 Building Element Type I-A Type III-A Page 4 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Primary Structural Frame 3 hours 1 hour Bearing walls Exterior Interior 3 hours 3 hours 2 hours 1 hour Nonbearing walls Exterior See Table 602 Nonbearing walls and partitions Interior 0 hours 0 hours Floor construction and secondary members 2 hours 1 hour Roof construction and secondary members 1 ½ hours 1 hour Fire Separation Distance The distance measured from the building face to one of the following: 1. The closest interior lot line; 2. To the centerline of a street, an alley or public way; or 3. To an imaginary line between two buildings on the property. The distance shall be measured at right angles from the face of the wall. Table 602 Fire Separation Distance = x (feet) Type of Construction Occupancy Group A, R, S-2 X < 5 All 1 5 ≤ X < 10 IA IIIA 1 1 10 ≤ X < 30 IA IIIA 1 1 X ≥ 30 All 0 The northeast side of the building is 20 feet from the property line, which has the smallest fire separation distance. Per Table 705.8, there is no limit to unprotected openings with a building equipped throughout with an automatic sprinkler system per NFPA 13. Chapter 4 Motor-Vehicle Related Occupancies 406.2.2 The clear height of each floor level in vehicle and pedestrian traffic areas shall not be less than 7 feet. Vehicle and pedestrian areas accommodating van-accessible parking required by Section 1106.5 shall conform to ICC A117.1 (8’-2” clear height). There is one van parking space located on Level 1. 406.2.4 Vehicle barrier systems not less than 2’-9” high shall be placed at the end of drive lanes, and at the end of parking spaces where the vertical distance to the ground or surface directly below is greater than 1 foot. 406.2.5 Vehicle ramps shall not be considered as required exits unless pedestrian facilities are provided. Vehicle ramps that are utilized for vertical circulation as well as for parking shall not exceed a slope of 1:15 (6.67%). Zoning requires 6% maximum slope. 406.2.7 Parking garages shall be separated from other occupancies in accordance with Section 508.1. The parking garage will be separated from Fire Area 1 and Fire Area 2 by a 3-hour fire wall. The parking garage will be separated from Fire 2 by a 1-hour fire barrier per Table 508.4. 406.4.2 A mechanical ventilation system shall be provided in accordance with the International Mechanical Code. Two vertical shafts are provided in the southern corners. Page 5 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Chapter 10 Egress Quantity of exits: Minimum of two per floor per fire area. A maximum of 50% may be horizontal exits. One exit from each dwelling unit. Capacity of exits: All occupant loads will be noted on the exiting plan provided at Plan Check. Occupant Load Per Table 1004.1.1 Residential = 200 gross Assembly: unconcentrated (tables and chairs) = 15 net Parking Garage = 200 gross Exercise Room = 50 gross Business Areas = 100 gross Accessory Storage, Mechanical equipment Room = 300 gross Dead Ends 1018.4 Dead ends. Where more than one exit or exit access doorway is required, the exit access shall be arranged such that there are no dead ends in corridors more than 50 feet in length (Occ. R-2, S with NFPA 13 sprinkler system); 20 feet in length otherwise. Exit Access Travel Distance 1016.1 Travel distance limitations. Exits shall be so located on each story such that the maximum length of exit access travel, measured from the most remote point within a story along the natural and unobstructed path of egress travel to an exterior door at the level of exit discharge, an entrance to a vertical exit enclosure, an exit passageway, a horizontal exit, an exterior exit stairway or an exterior exit ramp, shall not exceed the distances given in Table 1016.1. Table 1601.1 Occupancy With Sprinkler System (feet) A, R, S-1 250 S-2 400 Exit Access 1014.3 Common path of egress travel. In occupancies other than Groups H-1, H-2 and H-3, the common path of egress travel shall not exceed 75 feet. Exceptions: 1. The length of a common path of egress travel in Group B, F and S occupancies shall not be more than 100 feet, provided that the building is equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1(NFPA 13). 4. The length of a common path of egress travel in Group R-2 occupancy shall not be more than 125 feet, provided that the building is protected throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1 (NFPA 13). The common path of travel will not exceed 125 feet in R-2; 100 feet in S-1/S-2; 75 feet in A-3. Exit and Exit Access Doorways 1015.1 Exit or exit access doorways required. Two exits or exit access doorways from any space shall be provided where one of the following conditions exists: 1. The occupant load of the space exceeds the values in Table 1015.1. Exception: In Group R-2 occupancies, one means of egress is permitted within and from individual dwelling units with a maximum occupant load of 20 where the dwelling unit is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 (NFPA 13). 2. The common path of egress travel exceeds the limitations of Section 1014.3. 3. Where required by Sections 1015.3, 1015.4 and 1015.5, 1015.6 or 1015.6.1. Page 6 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Where a building contains mixed occupancies, each individual occupancy shall comply with the applicable requirements for that occupancy. Where applicable, cumulative occupant loads from adjacent occupancies shall be considered in accordance with the provisions of Section 1004.1. Table 1015.1 Occupancy Maximum Occupant Load A 49 S 29 R 20 per exception 1 1015.2.1 Two exits or exit access doorways. Where two exits or exit access doorways are required from any portion of the exit access, the exit doors or exit access doorways shall be placed a distance apart equal to not less than one-half of the length of the maximum overall diagonal dimension of the building or area to be served measured in a straight line between exit doors or exit access doorways. Interlocking or scissor stairs shall be counted as one exit stairway. Exceptions: 1. Where exit enclosures are provided as a portion of the required exit and are interconnected by a 1-hour fire-resistance-rated corridor conforming to the requirements of Section 1017, the required exit separation shall be measured along the shortest direct line of travel within the corridor. 2. Where a building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2, the separation distance of the exit doors or exit access doorways shall not be less than one-third of the length of the maximum overall diagonal dimension of the area served. 1021.2 Single exits. Only one exit shall be required from other buildings as indicated in Table 1021.2. Occupancies shall be permitted to have a single exit in buildings otherwise required to have more than one exit if the areas served by the single exit do not exceed the limitations of Table 1021.2. Mixed occupancies shall be permitted to be served by single exits provided each individual occupancy complied with the applicable requirements of Table 1021.2 for that occupancy. Where applicable, cumulative occupant loads from adjacent occupancies shall be considered in accordance with provisions of Section 1004.1. Basements with a single exit shall not be located more than one story below grade plane. Table 1021.2 Story Occupancy Maximum Occupants (or Dwelling Units) per Floor and Travel Distance A 49 occupants and 75 feet travel distance S w/NFPA 13 49 occupants and 100 feet First story or basement R 10 occupants and 75 feet travel distance S 29 occupants and 75 feet travel distance Second story R-2 4 dwelling units and 50 feet travel distance Third story R-2 w/ NFPA 13 or 13R and egress windows 4 dwelling units and 50 feet travel distance Some of the Ground Floor units (classified as a basement) will have exterior unit entries to satisfy the maximum occupants requirements of Table 1021.2. The interior corridor and stair will not serve as an exit for the units with access directly to the exterior. Page 7 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Egress Illumination 1006.1 Illumination required. The means of egress, including the exit discharge, shall be illuminated at all times the building space served by the means of egress is occupied. Exception: 3. Dwelling units in Group R-2. 1006.2 Illumination level. The means of egress illumination level shall not be less than 1 foot- candle at the walking surface. 1006.3. Illumination emergency power. The power supply for means of egress illumination shall normally be provided by the premises’ electrical supply. In the event of power failure, an emergency electrical system shall automatically illuminate all of the following areas: 1. Aisles and unenclosed egress stairways in rooms and spaces that require two or more means of egress. 2. Corridors, exit enclosures and exit passageways in buildings required to have two or more exits. 3. Exterior egress components at other than their levels of exit discharge is accomplished for buildings required to have two or more exits. 4. Interior exit discharge elements, as permitted in Section 1027.1, in buildings required to have two or more exits. 5. Exterior landings as required by Section 1008.1.6 for exit discharge doorways in buildings required to have two or more exits. The emergency power system shall provide power for duration of not less than 90 minutes and shall consist of storage batteries, unit equipment or an on-site-generator. The installation of the emergency power system shall be in accordance with Chapter 27. Exit Signs 1011.1 Where required. Exits and exit access doors shall be marked by an approved exit sign readily visible from any direction of egress travel. The path of egress travel to exits and within exits shall be marked by readily visible exit signs to clearly indicate the direction of egress travel in cases where the exit or the path of egress travel is not immediately visible to the occupants. Intervening means of egress doors within exits shall be marked by exit signs. Exit sign placement shall be such that no point in an exit access corridors or exit passageway is more than 100 feet or the listed viewing distance for the sign, whichever is less, from the nearest visible exit sign. Exceptions 1. Exit signs are not required in rooms or areas that required only one exit or exit access. 2. Main exterior exit doors or gates that area obviously and clearly identifiable as exits need not have exit signs where approved by the building official. 3. Exit signs are not required in dwelling units in Group R-2. 1011.2 Illumination. Exit signs shall be internally or externally illuminated. Exception: Tactile signs required by Section 1011.3 need not be provided with illumination. 1011.3 Tactile exit signs. A tactile sign stating EXIT and complying with ICC A117.1 shall be provided adjacent to each door to an area of refuge, an exterior area for assisted rescue, an exit stairway, an exit ramp, an exit passageway and the exit discharge. Egress Width 1005.1 Minimum required egress width. The means of egress width shall not be less than required by this section. The total width of means of egress in inches shall not be less than the total occupant load served by the means of egress multiplied by 0.3 inches per occupant for stairways and by 0.2 inches per occupant for other egress components. The width shall not be less than specified elsewhere in this code. Multiple means of egress shall be sized such that Page 8 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 the loss of any one means of egress shall not reduce the available capacity to less than 50 percent of the required capacity. The maximum capacity required from any story of a building shall be maintained to the termination of the means of egress. Exception: Means of egress complying with Section 1028. 1005.2 Door encroachment. Doors, when fully opened, and handrails shall not reduce the required means of egress width by more than 7 inches. Doors in any position shall not reduce the required width by more than one-half. Other nonstructural projections such as trim and similar decorative features shall be permitted to project into the required width a maximum opening into the path of egress travel shall not reduce the required width to less than one-half during the course of the swing. When fully open, the door shall not project more than 7 inches into the required width. Exception: The restrictions on a door swing shall not apply to doors within individual dwelling units of Group R-2. Exit Enclosures 1022.1 Enclosures required. Interior exit stairways and interior exit ramps shall be enclosed with fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 712, or both. Exit enclosures shall have a fire-resistance rating of not less than 2 hours where connecting four stories or more and not less than 1 hour where connecting less than four stories. The number of stories connected by the exit enclosure shall include any basements but not any mezzanines. Exit enclosures shall have a fire-resistance rating not less than the floor assembly penetrated, but need not exceed 2 hours. Exit enclosures shall lead directly to the exterior of the building or shall be extended to the exterior of the building with an exit passageway conforming to the requirements of Section 1023, except as permitted in Section 1027.1. An exit enclosure shall not be used for any purpose other than means of egress. 1022.3 Openings and penetrations. Exit enclosure opening protectives shall be in accordance with the requirements of Section 715. Openings in exit enclosures other than unprotected exterior openings shall be limited to those necessary for exit access to the enclosure from normally occupied spaces and for egress from the enclosure. Elevators shall not open into an exit enclosure. 1022.6 Exit enclosure exterior walls. Exterior walls of an exit enclosure shall comply with the requirements of Section 705 for exterior walls. Where nonrated walls or unprotected openings enclose the exterior of the stairway and the walls or openings are exposed by other parts of the building at an angle of less than 180 degrees, the building exterior walls within 10 feet horizontally of a nonrated wall or unprotected opening shall have a fire-resistance rating of not less than 1 hour. Openings within such exterior walls shall be protected by opening protectives having a fire protection rating of not less than 3/4 hour. This construction shall extend vertically from the ground to a point 10 feet above the topmost landing of the stairway or to the roof line, whichever is lower. All exterior walls will be one-hour rated but openings will be rated only if within the mandated distance. 1022.7 Discharge identification. A stairway in an exit enclosure shall not continue below its level of exit discharge unless an approved barrier is provided at the level of exit discharge to prevent persons from unintentionally continuing into levels below. Directional exit signs shall be provided as specified in Section 1011. The garage exit stairs discharge at the 4th level. Approved barriers will be in place to keep occupants from the 4th and 5th level from continuing downward. Page 9 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 1022.8 Floor identification signs. A sign shall be provided at each floor landing in exit enclosures connecting more than three stories designating the floor level, the terminus of the top and bottom of the exit enclosure and the identification of the stair or ramp. The signage shall also state the story of, and the direction to, the exit discharge and the availability of roof access from the enclosure for the fire department. The sign shall be located 5 feet above the floor landing in a position that is readily visible when the doors are in the open and closed positions. Floor level identification signs in tactile characters complying with ICC A117.1 shall be located at each floor level landing adjacent to the door leading from the enclosure into the corridor to identify the floor level. Horizontal Exits 1025.1 Horizontal exits. Horizontal exits serving as an exit in a means of egress system shall comply with the requirements of this section. A horizontal exit shall not serve as the only exit from a portion of a building, and where two or more exits are required, not more than one-half of the total number of exits or total exit width shall be horizontal exits. From the IBC Handbook, “A horizontal exit consists essentially of separating a floor into parts by dividing it with construction having a fire-resistance rating. The construction of one or more horizontal exit walls divides the floor into fire compartments. A horizontal exit may also be located between two buildings where travel occurs from one building to an area in another building at approximately the same level. This would include travel through a fire wall…Although horizontal exits are most frequently used only where the more traditional forms of egress design are not satisfactory, they can often be used quite effectively in many situations. In fact, in those instances where fire walls having a fire-resistance rating of not less than 2 hours are provided, the resulting arrangement is often tailor-made for use as a horizontal exit. “When properly constructed and installed, a horizontal exit may serve as a required exit. It may, in fact, be substituted on a one-for-one basis for other types of exits. Fire Area 1 & 2 have access to two vertical exit stair enclosures and a horizontal exit leading to the garage. 1025.2 Separation. The separation between buildings or refuge areas connected by a horizontal exit shall be provided by a fire wall complying with Section 706; or it shall be provided by a fire barrier complying with Section 707 or a horizontal assembly complying with Section 712, or both. The minimum fire-resistance rating of the separation shall be 2 hours. Opening protectives in horizontal exits shall also comply with Section 715. Duct and air transfer openings in a fire wall or fire barrier that serves as a horizontal exit shall also comply with Section 716. The horizontal exit separation shall extend vertically through all levels of the building unless floor assemblies have a fire-resistance rating of not less than 2 hours with no unprotected openings. Horizontal exit walls constructed as fire barriers shall be continuous from exterior wall to exterior wall so as to divide completely the floor served by the horizontal exit. 1025.3 Opening protectives. Fire doors in horizontal exits shall be self-closing or automatic- closing when activated by a smoke detector in accordance with Section 715.4.8.3. Doors, where located in a cross-corridor condition, shall be automatic-closing by activation of a smoke detector installed in accordance with Section 715.4.8.3. 1025.4 Capacity of refuge area. The refuge area of a horizontal exit shall be a space occupied by the same tenant or a public area and each such refuge area shall be adequate to accommodate the original occupant load of the refuge area plus the occupant load anticipated from the adjoining compartment. The anticipated occupant load from the adjoining compartment Page 10 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 shall be based on the capacity of the horizontal exit doors entering the refuge area. The capacity of the refuge area shall be computed based on a net floor area allowance of 3 square feet for each occupant to be accommodated therein. The area into which a horizontal exit leads shall be provided with exits adequate to meet the occupant requirements of this chapter, but not including the added occupant capacity imposed by persons entering it through horizontal exits from another area. At least one refuge area exit shall lead directly to the exterior or to an exit enclosure. Accessible Means of Egress 1007.1 Accessible means of egress required. Accessible means of egress shall comply with this section. Accessible spaces shall be provided with not less than one accessible means of egress. Where more than one means of egress is required by Section 1015.1 or 1019.1 from any accessible space, each accessible portion of the space shall be served by not less than two accessible means of egress. 1007.2 Continuity and components. Each required accessible means of egress shall be continuous to a public way and shall consist of one or more of the following components: 1. Accessible routes complying with Section 1104. 2. Stairways within vertical exit enclosures complying with Sections 1007.3 and 1022. 3. Exterior exit stairways complying with Sections 1007.3 and 1026. 4. Elevators complying with Section 1007.4. 6. Horizontal exits complying with Section 1025. 7. Ramps complying with Section 1010. 8. Areas of refuge complying with Section 1007.6. Exceptions: 1. Where the exit discharge is not accessible, an exterior area for assisted rescue must be provided in accordance with Section 1007.7. 1007.2.1 Elevators required. In buildings where a required accessible floor is four or more stories above or below a level of exit discharge, at least one required accessible means of egress shall be an elevator complying with Section 1007.4. Exceptions: 1. In buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2, the elevator shall not be required on floors provided with a horizontal exit and located at or above the level of exit discharge. With the horizontal exits present in the building, the elevator will not be a required means of egress. 1007.3 Stairways. In order to be considered part of an accessible means of egress, an exit access stairway as permitted by Section 1016.1 or exit stairway shall have a clear width of 48 inches minimum between handrails and shall either incorporate an area of refuge within an enlarged floor-level landing or shall be accessed from either an area of refuge complying with Section 1007.6 or a horizontal exit. Exceptions: 2. The clear width of 48 inches between handrails is not required at exit access stairway as permitted by Section 1016.1 or exit stairways in buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 (NFPA 13). 3. Areas of refuge are not required at exit stairways in buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 (NFPA 13). 4. The clear width of 48 inches between handrails is not required for exit stairways accessed from a horizontal exit. 7. The areas of refuge are not required in Group R-2 occupancies. No areas of refuge will be required in the project. Page 11 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Accessible Route 1104.1 Site arrival points. Accessible routes within the site shall be provided from public transportation stops; accessible parking; accessible passenger loading zones; and public streets or sidewalks to the accessible building entrance served. 1104.2 Within a site. At least one accessible route shall connect accessible buildings, accessible facilities, accessible spaces that have, as the only means of access between them, a vehicular way not providing pedestrian access. 1104.3 Connected spaces. When a building or portion of a building is required to be accessible, an accessible route shall be provided to each portion of the building, to accessible building entrances connecting accessible pedestrian walkways and the public way. 1104.3.1 Employee work areas. Common use circulation paths within employee work areas shall be accessible routes. 1104.4 Multilevel buildings and facilities. At one accessible route shall connect each accessible level, including mezzanines, in multilevel buildings and facilities. 1104.5 Location. Accessible routes shall coincide with or be located in the same area as a general circulation path. Where the circulation path is interior, the accessible route shall also be interior. Accessible Entrances 1105.1 Public entrances. In addition to accessible entrances required by Section 1105.1.1 through 1105.1.6, at least 60 percent of all public entrances shall be accessible. 1105.1.1 Parking garage entrances. Where provided, direct access for pedestrians from parking structures to buildings or facility entrances shall be accessible. 1105.1.3 Restricted entrances. Where restricted entrances are provided to a building or facility, at least one restricted entrance to the building or facility shall be accessible. Accessible Parking 1106.1 Required. Where parking is provided, accessible parking spaces shall be provided in compliance with Table 1106.1, except as required by Section 1106.2 through 1106.4. Table 1106.1 Total Parking Spaces Provided Required Minimum Number of Accessible Spaces 1 to 25 1 26 to 50 2 51 to 75 3 76 to 100 4 101 to 150 5 151 to 200 6 201 to 300 7 301 to 400 8 401 to 500 9 501 to 1,000 2% of total Page 12 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 1106.2 Group R-2. At least 2 percent, but not less than one, of each type of parking space provided for occupancy R-2, which are required to have Type A or Type B dwelling units, shall be accessible. Where parking is provided within or beneath a building, accessible parking spaces shall also be provided within or beneath the building. 1106.5 Van Spaces. For every six or fraction of six accessible parking spaces, at least one shall be a van-accessible parking space. 1106.6 Location. Accessible parking spaces shall be located on the shortest accessible route of travel from adjacent parking to an accessible building entrance. Where buildings have multiple accessible entrances with adjacent parking, accessible parking spaces shall be dispersed and located near the accessible entrances. Exceptions: 1. In multilevel parking structures, van-accessible parking spaces are permitted on one level. Dwelling Units 1107.4 Accessible route. At least one accessible route shall connect accessible building or facility entrances with the primary entrance of each Type A unit and Type B unit within the building or facility and with those exterior and interior spaces and facilities that serve the units.] 1107.6.2.1 Group R-2 Apartment Houses. Type A units and Type B units shall be provided. 1107.6.2.1.1 Type A units. In Group R-2 occupancies containing more than 20 dwelling units, at least 2 percent but not less than one of the units shall be a Type A unit. All R-2 units on a site shall be considered to determine the total number of units and the required number of Type A units. Type A units shall be dispersed among the various classes of units. 1107.6.2.1.2 Type B units. Where there are four or more dwelling units intended to be occupied as a residence in a single structure, every dwelling unit intended to be occupied as a residence shall be a Type B unit. 1017.2 Corridor width. The minimum corridor width shall be as determined in Section 1005.1, but not less than 44 inches. Exceptions: 2. Thirty-six inches (914 mm)—With a required occupant capacity of less than 50. 3. Thirty-six inches (914 mm)—Within a dwelling unit. The Ground Level is classified as a basement. Some areas do not have elevator service but are provided with an exterior accessible route to the pedestrian entry of the parking garage and the main entry to the clubhouse/leasing area. Fire-resistance of Building Elements Building Element Fire-resistance Rating (hours) Exterior Walls 1 Fire Walls 3 Fire Barriers – Exit Enclosures 2 Fire Barriers – Trash Rooms 1 Fire Barriers – Occupancy Separations 1 Fire Partitions – Party Walls 1 Fire Partitions – Corridor Walls 1 Horizontal Assemblies 1 Shafts – More than 3 stories 2 Page 13 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 Elevators 708.14 Elevator, dumbwaiter and other hoistways. Elevator, dumbwaiter and other hoistway enclosures shall be constructed in accordance with Section 708 and Chapter 30. 708.14.1 Elevator lobby. An enclosed elevator lobby shall be provided at each floor where an elevator shaft enclosure connects more than three stories. The lobby enclosure shall separate the elevator shaft enclosure doors from each floor by fire partitions. In addition to the requirements in Section 709 for fire partitions, doors protecting openings in the elevator lobby enclosure walls shall also comply with Section 715.4.3 as required for corridor walls and penetrations of the elevator lobby enclosure by ducts and air transfer openings shall be protected as required for corridors in accordance with Section 716.5.4.1. Elevator lobbies shall have at least one means of egress complying with Chapter 10 and other provisions within this code. Exceptions: 4. Enclosed elevator lobbies are not required where the building is protected by an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2. Stairways 1009.1 Stairway width. The width of stairways shall be determined as specified in Section 1005.1, but such width shall not be less than 44 inches. See Section 1007.3 for accessible means of egress stairways. Exceptions: 1. Stairways serving an occupant load of less than 50 shall have a width of not less than 36 inches. 1009.2 Headroom. Stairways shall have a minimum headroom clearance of 80 inches measured vertically from a line connecting the edge of the nosings. Such headroom shall be continuous above the stairway to the point where the line intersects the landing below, one tread depth beyond the bottom riser. The minimum clearance shall be maintained the full width of the stairway and landing. 1009.4 Stair treads and risers. Stair riser heights shall comply with Sections 1009.4.1 through 1009.4.5. 1009.4.2 Stair riser heights shall be 7 inches maximum and 4 inches minimum. Stair tread depths shall be 11 inches minimum. The riser height shall be measured vertically between the leading edges of adjacent treads. Rectangular tread depths shall be 11 inches minimum measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread’s leading edge. Winder treads shall have a minimum tread depth of 11 inches measured between the vertical planes of the foremost projection of adjacent treads at the intersections with the walkline and a minimum tread depth of 10 inches within the clear width of the stair. Exceptions: 4. Within dwelling units in Group R-2 occupancies; the maximum riser height shall be 7.75 inches; the minimum tread depth shall be 10 inches; the minimum winder tread depth at the walk line shall be 10 inches; and the minimum winder tread depth shall be 6 inches. A nosing not less than 0.75 inch but not more than 1.25 inches shall be provided on stairways with solid risers where the tread depth is less than 11 inches. 1009.5 Stairway landings. There shall be a floor or landing at the top and bottom of each stairway. The width of landings shall not be less than the width of stairways they serve. Every landing shall have a minimum dimension measured in the direction of travel equal to the width of the stairway. Such dimension need not exceed 48 inches where the stairway has a straight run. Doors opening onto a landing shall not reduce the landing to less than one-half the required width. When fully open, the door shall not project more than 7 inches into a landing. Page 14 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 1009.7 Vertical rise. A flight of stairs shall not have a vertical rise greater than 12 feet between floor levels or landings. 1009.12 Handrails. Stairways shall have handrails on each side and shall comply with Section 1012. Exceptions: 2. Stairways within dwelling units are permitted to have a handrail on one side only. 3. Decks, patios and walkways that have a single change in elevation where the landing depth on each side of the change of elevation is greater than what is required for a landing do not require handrails. 5. Changes in room elevations of only one riser within dwelling units in Group R-2 occupancies do not require handrails. Concealed Spaces 717.3.2 Groups R-1, R-2, R-3 and R-4. Draftstopping shall be provided in floor/ceiling spaces in Group R-2 buildings with three or more dwelling units. Draftstopping shall be located above and in line with the dwelling unit separations. Exceptions: 1. Draftstopping is not required in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 (NFPA 13). There will be no draftstopping in the floor/ceiling spaces. 717.4.2 Groups R-1 and R-2. Draftstopping shall be provided in attics, mansards, overhangs or other concealed roof spaces of Group R-2 buildings with three or more dwelling units. Draftstopping shall be installed above, and in line with, dwelling unit separation walls that do not extend to the underside of the roof sheathing above. Exceptions: 2. Draftstopping is not required in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 (NFPA 13). There will be no draftstopping in the attics. LOCAL AMENDMENTS SECTION 1503.7 – SNOWGUARDS / RETENTION: This section is hereby amended to add the following language: The design of snow retention devices / snow guards shall be designed by a licensed structural engineer or as determined by the Building Official. Roof overhangs will be snow-melted. Is this still required? SECTION 1510.7 - SNOW RETENTION. This section is hereby amended to add the following language: Roofs shall be designed to prevent accumulation of snow from shedding onto exterior balconies, decks, pedestrian and vehicular exits from buildings, stairways, sidewalks, streets, alleys, areas directly above or in front of gas and electrical utility meters, or adjacent properties. The design of snow retention devices shall be provided by a licensed structural engineer or as determined by the Building Official. Exception: Roof areas with a horizontal dimension of no more than 48 inches that will not receive snow shedding from a higher roof are exempt from the requirement of design by a licensed structural engineer. The horizontal projection shall be measured perpendicular to the exterior wall line from the edge of the roof or eave to any intersecting vertical surface. SECTION 1603.2 - BOULDER WALLS: This section is hereby amended to add the following language: Boulder walls (rock walls) four feet and taller shall be designed by an engineer licensed to practice in the State of Colorado. Page 15 of 15 © Humphreys & Partners Architects, L.P. 2/17/2010 SECTION 1604.1.1 - HAZARD AREA REQUIREMENTS: This section is hereby amended to add the following language: All new structures and additions to existing structures located in mapped debris flow, rock fall, avalanche and flood hazards shall be designed in compliance with Hazard Regulations within Title 12, Zoning Regulations and Title 14, Development Standards, Vail Town Code. SECTION 1607.7.1 - HANDRAILS AND GUARDS: This section is hereby amended to add the following language: Maximum guardrail deflection shall be L / 180 between supports. SECTION 1608.2 - GROUND SNOW LOADS: This section shall be deleted in its entirety and shall be replaced with the following language: Designs for roof snow loads shall be as follows: Roof pitches of less than 4:12 shall be designed to carry a 100 pound per square foot snow load and roof pitches of 4:12 and greater shall be designed to carry an 80 pound per square foot snow load. There is no allowance for pitch reduction nor is there a requirement to increase loading due to wind, valleys, snow drifting or type of roof covering. Any modification for snow load design shall be accomplished using section 1604.1. SECTION 1608.2.1 - ALTERNATIVE ROOFS: This section is hereby amended to add the following language: Alternative roofs shall be designed to carry a roof snow load resulting from a ground snow load of 143 pounds per square foot. All provisions of section 1608 shall apply to the analysis of the roof structure except for reductions for unobstructed slippery surfaces. The Engineer of Record is responsible for determining increased localized snow loading due to architectural building features. SECTION 1803.2.1 - SOILS REPORT: This section is hereby amended to add the following language: Site specific soils and foundation investigation reports shall be prepared by a Registered Soils Engineer for the completion of construction documents. Assumption and "open hole” investigations are allowed for additions to an existing building of less than 2,000 square feet of floor area. SECTION 2301.2 - GENERAL DESIGN REQUIREMENTS: This section is hereby amended to add the following language: Item # 5: Stress increases shall not be permitted for snow load duration. TABLE 2902.1 - MINIMUM NUMBER OF REQUIRED PLUMBING FIXTURES: This Table is hereby amended as follows: 1. Footnote f is amended as follows: Drinking fountains are not required for an occupant load of 100 or less, or in A-2, B, or M occupancies, regardless of occupant load. 2. Footnote g is hereby added to read: Service Sinks are recommended, but not required in B or M occupancies with an occupant load of 50 or less if a lavatory is provided.