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  1. Part one:
    We are installing a new dormer/bath at our cottage in Leelanau county, MI. Local code folks have been pressed on this issue, because the MI code, reads, “…facing wondows…”. They said yesterday (kind of referring to your comment of an often ignored rule) that they would approve our window placement (barely w/in the 60″ rule) if we could just provide any building (BOCA, etc) practice language to “…protect their butts”. Can you provide any assistance here… please? Our contractor missed this rule and we have special order windows now on site… w/o tempered glass, and cost asisde, it will take Anderson 4-5 wks to deliver the tempered sashes..

    HELP! And, in advance, many thanks.

    Bob & Barb Featherly

    Part two:
    As I read what you’ve offered, along with other language, this regulation seems to be referring to glass w/in 60” vertically from the tub standing surface, or shower drain… hence the “…bottom of the exposed window” statement. Other references even show a diagram showcasing a vertical distance, or referring to windows above the tub/shower. Our issue involved windows on the opposite wall of the bathroom from the shower, and horizontally measured, barely w/in the 60” requirement.

    Our bath layout: The shower is located in the inside corner or the new 7.5’ x 8’ room. The window in question is centered on the opposite, outside wall. By my calculations, the center of the shower door is 60” from the bottom center of this window. The closest corner of the window is 58” from the center of the shower door. Does this window need to tempered glass?

    Again, many thanks for the response.

    Best regards,
    Bob & Barb

    • Hi Bob and Barb,
      I’m not sure what exactly they need and what you’re trying to say. Do they need a paragraph from the code book stating that a window is permitted within 60″ from the standing surface of the shower or tub? I’ve never seen such statement.
      The only statement applying to a bathroom area is that it’s considered “hazardous location” and any glass sections (except for a glass block which is considered masonry / not glazing) within 60″ from the standing surface of the shower or tub must be safety glass type.
      If they are looking for a code paragraph to confirm this requirement I only have 2006 International Building Code Book & 2006 International Residential Code but this rule goes back to 1991:
      Glass & Glazing
      2406.3 Hazardous locations.
      The following shall be considered specific hazardous locations requiring safety glazing materials:

      5. Glazing in doors and enclosures for hot tubs, whirlpools,
      saunas, steam rooms, bathtubs and showers.
      Glazing in any portion of a building wall enclosing
      these compartments where the bottom exposed edge of
      the glazing is less than 60 inches (1524 mm) above a
      standing surface.
      6. Glazing in an individual fixed or operable panel adjacent
      to a door where the nearest exposed edge of the
      glazing is within a 24-inch (610 mm) arc of either vertical
      edge of the door in a closed position and where the
      bottom exposed edge of the glazing is less than 60
      inches (1524 mm) above the walking surface.

      Part two answer:
      You’re correct, it does refer to a vertical distance to the glass on walls enclosing the tub, shower base, hot tub, etc., and from the base surface level. Since the window is not located on any of the walls “enclosing” the shower base, that rule should not apply to it / you wouldn’t need a safety glass window. There’s also nothing that refers to the center of the shower door and window(s) on the opposite side of the shower enclosure / not installed within it.

      However, item #6 from the code might apply to your window if you have a bathroom entrance door within 24” from the glazing and the glazing is less than 60” from the floor walking surface (both distances must be present to apply this rule).

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