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Every sleeping room below the fourth story shall have at least one operable window or exterior door approved for emergency egress or rescue. The units must be operable from the inside opening without the use of separate tools. Where windows are provided as a means of egress or rescue, they shall have a sill height of not more than 44″ above the floor. All egress or rescue windows from sleeping rooms must have a minimum net clear opening of 5.7 square feet. The minimum net clear opening height dimension shall be 24″ and the minimum net clear opening width dimension shall be 20″. Bars, grilles or screens, placed over emergency escape windows shall be releasable or removable, from the inside, without the use of a key, tool or excessive force.
Lewisville Egress Code
Safety Glass (Laminated or Tempered) glass is required for windows that are within eighteen inches of the doors vertical edges when the door is in a closed position. It is also required in windows that are within eighteen inches of the floor, but only if that piece of glass is larger than nine square feet in size. Safety Glass is also required for glass that is within 60 inches of a bathtub or shower drain or “in the vicinity of” a pool area. For this reason many builders and re-modelers use operating windows that are “oriole” in style. An Oriole is a single or double hung window that has a smaller bottom sash than top sash. These are usually split up as 60% on Top and 40% on the bottom. By doing this even a large 40 X 78 window can still be used in a close to the ground application without safety glass.