The company I represent has an inventory of approximately 250 towers most of which are in the 35-40 year age range. We have a climbing inspection performed at a 4-6 year interval. I have been asked to begin reviewing the inspection reports and photographs to develop a plan/budget to correct any problems/issues found. If required, the towers were originally painted but over time virtually all have been converted to strobe lighting and painting is a thing of the past. I am seeing a lot of rusty tower members, U bolts on antenna supports, hose clamps, guy wire saddle clamps, etc. In a few cases the weep holes on diagonal members are showing signs of internal member rust present. Questions: 1)Is there any method to determine how severe the rusty U bolts, saddle clamps, etc is? Is failure imminent? 2) Is there a method to determine how severe the structural member rust is? How much life is left in the member? That's probably a hard one to address given a host of factors but it's the degree of rust I concerned about. 3) It there any sacrifice in strength in replacing [formerly] galvanized U bolts/nuts etc with stainless steel vs replacing with new galvanized? 4) What about rusty guy wires? I am seeing a wide variety of situations ranging from one strand on a wire rusty, to several strands, to all strands, to only one wire at an elevation, to all wires at an elevation to all wires at all elevations. Thanks in advance for your input.