It has become all too common during structural maintenance and inspections to discover anchor bolts extending far above the top of the foundation. TIA design standards place limits on the height to maximize the bolt capacity. If not grouted, the height of the bottom of the anchor bolt above the concrete should not exceed one bolt diameter. It is important to note that some tower manufacturers require the use of grout and the grout should be placed in accordance with these recommendations while the height of the grout should not extend beyond the limitation set by the engineer of record.