U.S.-based engineered support structure manufacturer Sabre Industries Inc.'s credit measures are improving due to better-than-expected operating results (especially in its Utility Structures segment), as well as because of continued efficiency gains and cost reductions. As a result, we are revising our rating outlook on Sabre to positive from stable and affirming our 'B-' corporate credit rating on the company. At the same time, we are affirming our 'B' issue-level ratings on the company's $65 million revolving credit facility due 2020 and $255 million term loan due 2022. The recovery ratings on the senior secured facilities are unchanged at '2'. The positive outlook reflects our expectations that Sabre's operating performance will continue to improve over the next 12 months, supported by