A method of supplying reinforcing bar comprising: forming the reinforcing bar from rovings of reinforcing fibers arranged generally longitudinal to the bar and a thermosetting resin permeated through the rovings to form a structure integrated by the permeated resin; wherein the step of forming the reinforcing bar includes providing a series of inner rovings of glass reinforcing fibers arranged longitudinal to the bar, providing a first helical wrapping or wrappings (16, 17) of at least one glass roving wrapped around the inner rovings in a first direction of wrapping, and providing a second helical wrapping or wrappings (16, 17) of at least one glass roving wrapped around the inner rovings in a second opposed direction of wrapping with the resin being permeated through both the inner rovings and through the wrappings to form a structure integrated by the permeated resin; wherein the bar has an outer surface portion which extends along at least most of the length of the bar and at the outer surface portion, the inner rovings have parts thereof between the first and second wrapping or wrappings exposed and bulged outwardly by tension applied by the wrapping or wrappings during curing, the bulged parts defining components of the outer surface portion of the bar which are thus rough and exposed for engaging a material to be reinforced so as to transfer longitudinal loads between the material to be reinforced and the inner rovings; and wherein, at the outer surface portion, the thermosetting resin is cured while the inner and wrapped rovings are free from external pressure such that the shape of the outer surface is defined solely by the shape of the inner and wrapped rovings as the resin is cured, characterized in that the method further comprises: coiling the formed bar to form a coil of the bar wrapped a series of times around an axis at right angles to the length of the bar to a radius of curvature less than 2.1 m (7 feet) with no damage; applying holding members to hold the bar in the coil; transporting the coil of the bar to a remote location; at the remote location, removing the bar from the coil and cutting the bar to a required length less than the length of the coil. forming the reinforcing bar from rovings of reinforcing fibers arranged generally longitudinal to the bar and a thermosetting resin permeated through the rovings to form a structure integrated by the permeated resin; wherein the step of forming the reinforcing bar includes providing a series of inner rovings of glass reinforcing fibers arranged longitudinal to the bar, providing a first helical wrapping or wrappings (16, 17) of at least one glass roving wrapped around the inner rovings in a first direction of wrapping, and providing a second helical wrapping or wrappings (16, 17) of at least one glass roving wrapped around the inner rovings in a second opposed direction of wrapping with the resin being permeated through both the inner rovings and through the wrappings to form a structure integrated by the permeated resin; wherein the bar has an outer surface portion which extends along at least most of the length of the bar and at the outer surface portion, the inner rovings have parts thereof between the first and second wrapping or wrappings exposed and bulged outwardly by tension applied by the wrapping or wrappings during curing, the bulged parts defining components of the outer surface portion of the bar which are thus rough and exposed for engaging a material to be reinforced so as to transfer longitudinal loads between the material to be reinforced and the inner rovings; and wherein, at the outer surface portion, the thermosetting resin is cured while the inner and wrapped rovings are free from external pressure such that the shape of the outer surface is defined solely by the shape of the inner and wrapped rovings as the resin is cured, coiling the formed bar to form a coil of the bar wrapped a series of times around an axis at right angles to the length of the bar to a radius of curvature less than 2.1 m (7 feet) with no damage; applying holding members to hold the bar in the coil; transporting the coil of the bar to a remote location; at the remote location, removing the bar from the coil and cutting the bar to a required length less than the length of the coil.