Entry Type ID Date Applicable Rating System Primary Credit Inquiry (LIs) Ruling (LIs) Related Addenda/LIs Related Resources Campus Applicable Internationally Applicable Country Applicability Reference Guide (Addenda) Page (Addenda) Location (Addenda) Description of Change (Addenda) "Rating System Correction, Reference Guide Correction" "100000708" "2010-11-03" "Schools - New Construction" "None" "None" "Green Building Design and Construction, 2009 edition" "Schools Rating System: 81, Reference Guide: 575" "Intent" "In the first line, replace ""facilitates"" with ""facilitate""" "Reference Guide Correction" "100001121" "2011-11-01" "Schools - New Construction" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 " "BD+C RG: 582" "Definitions" "Revise the definition for core learning spaces to be, ""Core learning spaces are spaces for educational activities where the primary functions are teaching and learning and where good speech communication is critical to a student\'s academic achievement. These spaces include, but are not limited to, classrooms, enclosed or open plan), instructional pods or activity areas, group instruction rooms, conference rooms, libraries, offices, speech clinics, offices used for educational purposes and music rooms for instruction, practice and performance.""" "Reference Guide Correction" "100000709" "2010-11-03" "New Construction, Schools - New Construction, Core and Shell" "None" "None" "Green Building Design and Construction, 2009 edition" "576" "Summary of Referenced Standards" "In the first standard (ANSI), remove ""/ASHRAE""" "Reference Guide Correction" "100001003" "2011-08-01" "Schools - New Construction" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "BD+C RG: 580" "Bullet item at top of page" "In the second line of the bulleted item, replace ""45 dBA"" with ""40 dBA""" "Reference Guide Correction" "100001106" "2011-11-01" "Schools - New Construction" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 " "BD+C RG: 582" "Definitions" "In alphabetical order, add the following definition for ancillary learning spaces, ""Ancillary learning spaces are spaces where good communication is important to a student\'s educational progress but for which the primary educational functions are informal learning, social interaction or similar activity other than formal instruction.\nThese areas include, but are not limited to, corridors, cafeterias, gymnasia, and indoor swimming pools.""\n" "Rating System Correction, Reference Guide Correction" "100001088" "2011-11-01" "Schools - New Construction" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 " "BD+C RG: 575, Schools RS: 104" "Sound Transmission" "Replace the text ""the building shell, classroom partitions and other core learning space partitions"" with ""classrooms and other core learning spaces"" so that the first sentence reads, ""Design classrooms and other core learning spaces to meet the Sound Transmission Class (STC) requirements of ANSI Standard S12.60-2002, Acoustical Performance Criteria, Design Requirements and Guidelines for Schools, except windows, which must meet an STC rating of at least 35.""" "Global ACP" "100001366" "2012-07-06" "Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "Schools RS: 103" "Sound Transmission" "Add the following sentence at the end of the paragraph: ""Projects outside the U.S. may use a local equivalent to ANSI Standard S12.60-2002.""" "Global ACP" "100001367" "2012-07-06" "Schools - New Construction" "None" "None" "X" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010" "Schools RS: 103" "Requirements" "Delete the Alternative Compliance Path for Projects Outside the U.S." "LEED Interpretation" "10095" "2011-08-01" "Schools - New Construction" "The STC 50 rating between core learning spaces required by ANSI S12.60-2002 challenges a wall assembly that has been the standard for public school construction in Ohio for decades. The construction of Otsego PK-5 is no exception as an 87,000 square foot combination masonry bearing and steel frame construction requiring durability, student security, ease of maintenance, and structural integrity on a predetermined budget developed and co-funded by the Ohio School Facilities Commission.\nThe design team has enlisted the services of a professional acoustician and reviewed the options for STC 50 wall construction. We have been advised against sand and grout filling CMU walls due to the difficulty it creates for future renovation, the unnecessary weight it adds to the building, and the uncertainty of knowing whether or not the fill was done properly. We feel that heavy weight block (48 lbs. or more) is not a practical building material due to the weight it adds to the building as well as increased construction time and labor. Additionally, enlarging the wall thickness between classrooms is not feasible due to the predetermined square footage requirements of the building set by the Ohio School Facilities Commission. The School District and design team strongly feel that metal stud and gypsum wall board construction, either as furring or stand alone construction will not provide the longevity required of classroom walls in a public school system and will quickly become a maintenance issue.\nANSI S12.60-2010 has acknowledged this design/construction dilemma by including a footnote in Table 4 (the equivalent of ANSI S12.60-2002 Table 2) associated with the STC 50 requirements for #Other enclosed or open-plan core learning space#etc.# which states, #A 20 cm (8#) concrete masonry unit wall having a surface weight area density of at least 180 kg/m2 painted and sealed on both sides, acoustically sealed at the entire perimeter and extending from the floor slab to the structural deck above, is an acceptable alternate assembly that conforms to the intent of 5.4.2.1#. 5.4.2.1 being Table 4 # Minimum STC ratings required for single or composite wall and floor-ceiling assemblies that separate a core learning space from an adjacent space.\nPlease note that ANSI S12.60-2010 Table 4 has also included an exception to the STC 53 requirement for core learning spaces adjacent to toilet rooms that states,# These requirements do not apply to toilets opening only into the core learning space and used only by occupants of the core learning space#, a condition that was found acceptable by a Credit Interpretation Ruling dated 4/21/2009 under LEED for Schools 2007 IEQ Prerequisite 3, Minimum Acoustical Performance.\nOtsego Local School District and the design team respectfully request that the above referenced normal weight 8# CMU wall construction now accepted by ANSI S12.60-2010 be considered suitable for compliance with the STC 50 rating requirement between core learning spaces associated with LEED for Schools 2009 IEQ Credit 9 Enhanced Acoustical Performance." "The project team is asking whether a wall construction (20 cm (8 in) concrete masonry unit wall having a surface weight area density of at least 180 kg/m2 painted and sealed on both sides, acoustically sealed at the entire perimeter and extending from the floor slab to the structural deck above) now accepted by ANSI S12.60-2010, is suitable for compliance with the STC 50 requirement for this credit. \n Yes, the use of the 2010 version of ANSI S12.60 is acceptable for this credit. " "None" "None"