Access to fire escapes shall be any one of the following:
1. Through a room between the corridor and the fire escape if the door to the room is capable of being opened from the corridor side without the use of a key, tool, or special knowledge or effort, or by an alternate method of access, as determined by the Chief.
2. By a door capable of being opened to a fire escape from the interior without the use of a key, tool, or special knowledge or effort, as determined by the Chief.
3. By a window capable of being opened from the interior without the use of a key, tool, or special knowledge or effort, as determined by the Chief. Such window shall have a minimum dimension of 29 inches when open. The sill shall be not more than 30 inches above the floor and landing.