I am needing to anchor some 2x2x3/16 thick pieces of angle to concrete. They are to be the track for a sliding assembly that haslarge (12in diameter) rolls. This all holds varying diameters of steel tanks up to 8 foot, 1/2 wall to be welded. The angle is going to be 8 foot long. There are going to be at least 4 pieces of angle I want to be as parrallel as possible for the casters to ride on. Part of the problem is when setting down there very heavy tanks they are possibly putting a lot of strees on things as they are put down withoverhead lift. The length of travel is 3 feet. I'm going to weld tabs on end of angle with holes and am afraid that the clearance I need in their holes will allow for movement. But I need holes to aligne. Can I drill oversize holes in concrete and put anchors into some sort of apoxy after aliging? I plan to weld all angles together if it works ok. I thought of making a bushing to go into my holes in the angle to get concrete drill started on center. Then taking this out and drilling size for anchors.