Windows. This applies if the bottom edge of the glass is less than 18 inches above the floor and the top edge is over 36 inches from the floor.

....If there is glass below that height, it must be tempered. (most people have a bay/bow window there, in that rough opening, but the house I bought has these 3 windows) The interior seat (sill) is only 15 inches from the floor. I believe there are rules about this for upper story windows though, in that they need a barrier to keep children from being able to climb or fall out the opening. Glazing between the floor and a height of 24 inches shall ... Glazing in the following areas are subject to human impact and shall either be tempered or laminated safety glass, or approved plastic, and shall be labeled as such. Glass Safety glass that has been tested and labeled, such as tempered glass, is required in windows in the following locations: • Windows that are both within 24 inches of a door in a closed position and within 60 inches of the floor. The International Residential Code allows you to place a window as low as you want to the floor, and unless the piece of glass is 9 square feet or larger it doesn't have to be tempered. Any fixed or movable window that is bigger than 9 square feet should be made of tempered glass. The tempering process changes the properties of the glass, so that if it should be broken, it crumbles into dull cubes to minimize any injury. I can't remember ever seeing the height requirement being tied to a grade (i.e.

Also known as toughened glass, tempered glass is stronger and safer than regular glass. The requirement for tempered glass applies when the window or door is within 18" of the floor and the glass area is greater than X sq ft. (I think that X = 9). CRC R308.1 . Glass in walls used as a barrier for indoor or outdoor swimming pools or spas when both of the following exist: The bottom edge of the glazing is less than 60” above a pool side of the glazing The glazing is within 5 feet of a swimming pool or spa deck area; 6. 5. Codes will vary place to place, 18" is common for non-tempered glass. Windows that have the potential for human impact are legally required to contain tempered glass. This building code provides a safety factor for small children. Glass stair rails and baluster panels must be made of tempered glass. * If glass is 42” from the floor in a stairwell it has to be tempered. Minimum sill height for windows according to the 2012 International Residential Code.

Tempered glass must be used if the window has the bottom edge which is 18 inches above the floor, and the top edge over 26 inches above the floor. That being said, if it is within 24" of an exterior door opening it must be tempered regardless of size or height. Unless the code has been recently updated, anything within 20" of the floor has to be tempered, but there is no minimum sill height requirement above the floor, the window can go all the way to the floor. If the window is 36 inches within a walkway and the window is larger than 9 square feet then tempered glass must also be used.

Codes will vary place to place, 18" is common for non-tempered glass. outside the house) In some situations tempered glass is preferable. Code for Window Sill Height. Unless the code has been recently updated, anything within 20" of the floor has to be tempered, but there is no minimum sill height requirement above the floor, the window can go all the way to the floor.

2018 International Building Code (2406.4.3) specifies that tempered (safety) glass is needed if all these conditions exist: ... and safety division may require that all new windows have at least one pane tempered. Position