Editing Roof and tunnel hacking (section)

==Shafting==<!-- This section is linked from [[Shaft]] -->
Buildings may have [[maintenance shaft]]s for passage of [[pipe (material)|pipe]]s and [[Duct (HVAC)|duct]]s between floors.  Climbing these shafts is known as shafting. The practice is similar to [[buildering]], which is done on the outsides of buildings.

Regular use of a shaft can wear down insulation and cause other problems. To fix these problems, hackers sometimes take special trips into the shafts to correct any problems with [[duct tape]] or other equipment.

A dangerous variant of shafting involves entering [[elevator shaft]]s, either to ride on the top of the elevators, or to explore the shaft itself. This activity is sometimes called [[elevator surfing]]. The elevator is first switched to "manual" mode, before boarding or exiting, and back to "automatic" mode after, to allow normal operation (and avoid detection). Switching elevators, getting too near the ceiling (or under the elevator) or the counterweight (or cables), or otherwise failing to follow safety precautions can lead to death or injury. Crackdowns may increase in both frequency and harshness, both legally and with respect to physical access to coveted locations.

Some shafts (such as those intended for but lacking an elevator) are accessible by use of [[Single rope technique|rope]] but are not actually climbable by themselves.