Q Span Clamp in the Telecommunications Industry Q Span Clamp is designed for 1/4″ to 7/16″ messenger strand, used for mid-span drop wire take-offs, will hold cable away from obstacles in the line of aerial construction. Q Span clamp is used in drop cable installations as an attachment to the strand for either accepting the bail of drop wire clamps or for wrapping the support wire of drop cable. It can provide drop wire takeoffs along the span and relieve tension on the drop wire at this point.