17.13(18) An ISO classified area constructed or renovated Change date to reflect a future date, Adjust to “Best Practice”. One 4’ hood after January 1, 2017 may not contain suggesting 18 months post provides much more dust collecting overhangs or ledges. publication. “ledge” area than a 0.25” ledge around a door in the clean room. Change verbiage to “An ISO classified area constructed or renovated after Pass-throughs need to have a wide Month Day, Year shall be constructed enough deck/ base for material to be set to minimize dust-collecting down onto it during transfer between unnecessary overhangs or ledges or rooms. Walls between the anteroom and Make this a best practice the adjacent space and between the recommendation anteroom and buffer room(s) would need be 24" + thick to remove all "dust collecting overhangs". Section Draft Recommendation Evidence Impact/Notes Beginning January 1, 2018, sprinkler heads in all Simplify to “sprinkler heads in all ISO Clarify: what is the importance of having 17.13(23) ISO classified areas shall be specifically designed classified areas shall be specifically the sprinkler heads being load-bearing? for clean rooms and installed in such a manner to designed for clean rooms”. This will be very confusing and difficult to withstand weight-bearing loads on the ceiling construct and adhere to.
17.13(18) An ISO classified area constructed or renovated after January 1, 2017 may not contain overhangs or ledges. Change date to reflect a future date, suggesting 18 months post publication. Change verbiage to “An ISO classified area constructed or renovated after Month Day, Year shall be constructed to minimize dust-collecting unnecessary overhangs or ledges or Make this a best practice recommendation Adjust to “Best Practice”. One 4’ hood provides much more dust collecting “ledge” area than a 0.25” ledge around a door in the clean room. Pass-throughs need to have a wide enough deck/ base for material to be set down onto it during transfer between rooms. Walls between the anteroom and the adjacent space and between the anteroom and buffer room(s) would need be 24" + thick to remove all "dust collecting overhangs". Section Draft Recommendation Evidence Impact/Notes 17.13(23) Beginning January 1, 2018, sprinkler heads in all ISO classified areas shall be specifically designed for clean rooms and installed in such a manner to withstand weight-bearing loads on the ceiling Simplify to “sprinkler heads in all ISO classified areas shall be specifically designed for clean rooms”. Clarify: what is the importance of having the sprinkler heads being load-bearing? This will be very confusing and difficult to construct and adhere to.