§95.1315 Antenna height restriction.
The highest point of any MURS antenna must no be more than 18.3 meters (60 feet) above the ground or 6.10 meters (20 feet) above the highest point of the structure on which it is mounted.
sort of confusing and nonsensical. It applies to "any MURS station". So maybe using the logic of the FCC a window washer could use the radio to the roof plus 20 feet, even if he was on a skyscraper.
Now if he is a tree climber, the 60 foot rule would prevail.
§ 95.2741 MURS antenna height limit.
The highest point of any MURS station antenna
must not be more than 18.3 meters (60 feet) above
the ground or 6.10 meters (20 feet) above the
highest point of the structure on which it is mounted.
MURS station antennas must also meet the
requirements in § 95.317 regarding menaces to air
navigation. See 47 C.F.R. § 95.317 and consult Part
17 of the FCC’s Rules for more information.