Abstract: An existing vertical monopole tower is reinforced by a plurality of vertically extending metal reinforcing members in the form of elongated channel members or angle plate members or ribbed plate members. The reinforcing members have longitudinally spaced holes which align with vertically spaced holes in the tower wall, and blind fasteners extend through the aligned holes to secure the reinforcing members to the tower. The fasteners provide for transferring only tensile forces or tensile and shear forces to the reinforcing members. Vertically aligned reinforcing members have adjacent end portions spliced together by splice plates and blind fasteners, and the splice plates are fastened to the web portions of the channel members or the ribs of the rib plate members or the wing portions of the angle plate members. Shear plates and pin assemblies may also be used to transfer shear forces and in splicing vertically aligned reinforcing members.