Every sleeping room shall have at least 1 emergency escape and rescue opening. Windows: sill height of window above floor will not to exceed 44” Minimum opening area: ≥ 5.7 square feet Minimum opening height: ≥ 24 inches Minimum opening width: ≥ 20 inches Window Well horizontal dimensions: ≥ 9 square feet Window Well horizontal projection: ≥ 36 inches Ladders: Required on window wells deeper than 44 inches. Must be permanently affixed to the well. Inside width of ladder or rungs ≥ 12 inches & must project at least 3 inches from the wall, but no more than 6 inches. The ladder or rungs cannot be spaced more than 18 inches vertically apart. Grates: Shall be removable from the inside of the well without any special tools
Please note that the description above is a brief summary of the Egress Qualifications and is not all inclusive or intended to be used a substitute for the official International Residential Code™ (IRC 2015).