S.C. Code Ann. § 24-13-450
An inmate of a state, county, or city correctional facility or a private entity that contracts with a state, county, or city to provide care and custody of inmates, including persons in safekeeper status, acting alone or in concert with others, who by threats, coercion, intimidation, or physical force takes, holds, decoys, or carries away any person as a hostage or for any other reason whatsoever shall be deemed guilty of a felony and, upon conviction, shall be imprisoned for a term of not less than five years nor more than thirty years. This sentence shall not be served concurrently with any sentence being served at the time the offense is committed.