elevation provides an 18 + or - 1 foot clearance over a 6 ft tall person standing on the top platform of the RCF.
(elevation; provides; an 18 + or - 1 foot clearance over a 6 ft tall person) (a 6 ft tall person; standing; on the top platform of the RCF)
elevation a 6 ft tall person
provides standing
an 18 + or - 1 foot clearance over a 6 ft tall person
on the top platform of the RCF